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Cheap flights from Washington, D.C. Dulles Intl Airport to Seattle from £109

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
IAD — SEA
6 Jun — 13 Jun1
1 adult
Thu 6/6
Thu 13/6

Cheap flight deals from Dulles Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 1 June 2024.

Popular in

June

Cheapest in

January

Round-trip from

£453

One-way from

£187
High demand for flights, 20% potential price rise
Search Deals
Best time to find cheap flights, 11% potential price drop
Search Deals
From Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
Search Deals

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Users have found that booking a flight from Washington, D.C. Dulles Intl Airport to Seattle at least 53 days early can save you up to 60% on average compared to booking a flight this week. If booking 53 days before your flight isn’t an option for you, users have found flights from Washington, D.C. Dulles Intl Airport to Seattle for as little as £372 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £427 for flights departing within the next 3 days.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Seattle?

Our data shows that January tends to be the cheapest month to fly to Seattle from Washington, D.C. Dulles Intl Airport. Users have commonly found prices around £319 for the month, but tickets can be as low as £109. Due to multiple factors, prepare for potentially higher prices in June.

What is the cheapest time of day to fly from IAD to SEA?

When flying from Washington, D.C. Dulles Intl Airport to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap United Airlines flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by United Airlines for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
Peruse some of the lowest-priced United Airlines flights we've found from Washington, D.C. to Seattle. Make sure to double check the flight details before booking.
Tue 30/722:10IAD - SEA
Nonstop5h 44mUnited Airlines
Wed 7/822:30SEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 1/6£296
Thu 15/822:10IAD - SEA
Nonstop5h 44mUnited Airlines
Tue 20/822:50SEA - IAD
Nonstop5h 05mUnited Airlines
Deal found 1/6£301
Sun 11/822:10IAD - SEA
Nonstop5h 44mUnited Airlines
Sat 17/818:35SEA - IAD
1 stop7h 50mUnited Airlines
Deal found 1/6£305
Fri 23/817:26IAD - SEA
Nonstop5h 48mUnited Airlines
Mon 26/822:50SEA - IAD
Nonstop5h 05mUnited Airlines
Deal found 31/5£306
Mon 12/822:10IAD - SEA
Nonstop5h 44mUnited Airlines
Fri 16/818:35SEA - IAD
1 stop7h 50mUnited Airlines
Deal found 31/5£310
Tue 6/818:15IAD - SEA
1 stop9h 37mUnited Airlines
Wed 14/823:47SEA - IAD
1 stop7h 06mUnited Airlines
Deal found 31/5£311
Thu 15/817:20IAD - SEA
Nonstop5h 47mUnited Airlines
Sun 18/823:59SEA - IAD
1 stop8h 39mUnited Airlines
Deal found 31/5£313
Sat 17/812:35IAD - SEA
1 stop8h 47mUnited Airlines
Sun 25/818:45SEA - IAD
1 stop7h 39mUnited Airlines
Deal found 31/5£316
Thu 15/806:30IAD - SEA
1 stop8h 47mUnited Airlines
Wed 21/806:45SEA - IAD
2 stops11h 11mUnited Airlines
Deal found 31/5£320

Cheap Alaska Airlines flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Alaska Airlines for the route between Dulles Intl and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
To aid your search, here are some of the cheapest Alaska Airlines flights we've found from Washington, D.C. to Seattle. Deals are refreshing constantly so come back soon for more options.
Wed 21/816:16IAD - SEA
1 stop10h 26mAlaska Airlines
Tue 27/816:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 1/6£225
Sat 16/1107:00IAD - SEA
Nonstop5h 50mAlaska Airlines
Mon 18/1109:36SEA - IAD
1 stop8h 54mAlaska Airlines
Deal found 30/5£229
Tue 16/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Thu 18/723:43SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 30/5£234
Sun 8/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Wed 11/919:56SEA - IAD
1 stop16h 17mAlaska Airlines
Deal found 31/5£237
Fri 15/1117:15IAD - SEA
1 stop9h 29mAlaska Airlines
Wed 20/1108:50SEA - IAD
1 stop9h 40mAlaska Airlines
Deal found 31/5£242
Wed 21/817:38IAD - SEA
1 stop18h 16mAlaska Airlines
Tue 27/816:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 31/5£251
Sat 21/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Sat 28/907:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 1/6£256
Tue 16/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Tue 23/723:43SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 31/5£261
Tue 20/819:09IAD - SEA
Nonstop5h 51mAlaska Airlines
Mon 26/821:15SEA - IAD
1 stop16h 18mAlaska Airlines
Deal found 30/5£266

Cheap Dulles Intl to Seattle flights in June & July 2024

Find cheap flight options from Dulles Intl to Seattle specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 909,873 searches. Prices were last updated on 1 June 2024.
Scroll through some of the best deals on flights from Washington, D.C. to Seattle in 2024. Check back in a little while for more flight options.
Wed 26/611:16IAD - SEA
1 stop14h 38mSun Country Air
Tue 2/718:02SEA - IAD
1 stop13h 24mSun Country Air
Deal found 31/5£247
Sat 22/612:40IAD - SEA
1 stop22h 22mSun Country Air
Mon 1/723:59SEA - IAD
1 stop7h 58mSun Country Air
Deal found 31/5£255
Wed 26/611:16IAD - SEA
1 stop14h 38mSun Country Air
Mon 1/717:50SEA - IAD
1 stop14h 07mSun Country Air
Deal found 31/5£263
Tue 18/611:50IAD - SEA
1 stop24h 32mSun Country Air
Wed 26/617:43SEA - IAD
1 stop14h 37mSun Country Air
Deal found 31/5£267
Fri 7/612:33IAD - SEA
1 stop23h 29mSun Country Air
Mon 10/618:15SEA - IAD
1 stop13h 22mSun Country Air
Deal found 31/5£271
Wed 26/616:16IAD - SEA
1 stop10h 28mAlaska Airlines
Mon 1/723:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 31/5£273
Tue 11/611:30IAD - SEA
1 stop7h 45mSun Country Air
Tue 18/612:13SEA - IAD
1 stop19h 13mSun Country Air
Deal found 1/6£275
Tue 25/619:00IAD - SEA
Nonstop5h 53mAlaska Airlines
Mon 1/723:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 31/5£277
Fri 7/612:33IAD - SEA
1 stop30h 22mSun Country Air
Tue 11/617:20SEA - IAD
1 stop14h 06mSun Country Air
Deal found 31/5£279

Dulles Intl to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Dulles Intl and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
Scroll through some of the best deals on flights from Washington, D.C. to Seattle in 2024. Check back in a little while for more flight options.
Wed 21/807:00IAD - SEA
Nonstop5h 39mAlaska Airlines
Wed 28/816:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 31/5£218
Wed 21/807:30IAD - SEA
Nonstop5h 47mDelta
Mon 26/821:59SEA - IAD
Nonstop4h 57mDelta
Deal found 31/5£222
Wed 21/816:16IAD - SEA
1 stop10h 26mAlaska Airlines
Tue 27/816:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 30/5£225
Fri 5/707:30IAD - SEA
Nonstop5h 42mDelta
Thu 11/721:59SEA - IAD
Nonstop4h 57mDelta
Deal found 1/6£227
Sat 16/1107:00IAD - SEA
Nonstop5h 50mAlaska Airlines
Mon 18/1109:36SEA - IAD
1 stop8h 54mAlaska Airlines
Deal found 30/5£229
Tue 23/711:32IAD - SEA
1 stop26h 40mSun Country Air
Tue 30/711:20SEA - IAD
1 stop20h 10mSun Country Air
Deal found 31/5£232
Tue 29/1009:00IAD - SEA
1 stop10h 48mAlaska Airlines
Tue 12/1108:50SEA - IAD
1 stop9h 40mAlaska Airlines
Deal found 1/6£233
Fri 5/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Thu 11/723:43SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 31/5£234
Sat 7/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Mon 9/921:00SEA - IAD
1 stop16h 52mAlaska Airlines
Deal found 1/6£237

Direct flights to Seattle from Dulles Intl

Discover direct flight options from Dulles Intl to Seattle. Find direct flights with no stopovers, providing a convenient travel experience. Explore direct flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
If you're seeking options on non-stop flights from Washington, D.C. to Seattle, check out these fares. If you're looking for other options for flights from Washington, D.C. to Seattle, make sure to update the search form at the top of page.
Wed 21/807:00IAD - SEA
Nonstop5h 39mAlaska Airlines
Wed 28/816:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 31/5£218
Wed 21/807:30IAD - SEA
Nonstop5h 47mDelta
Mon 26/821:59SEA - IAD
Nonstop4h 57mDelta
Deal found 31/5£222
Fri 5/707:30IAD - SEA
Nonstop5h 42mDelta
Thu 11/721:59SEA - IAD
Nonstop4h 57mDelta
Deal found 1/6£227
Sat 21/917:20IAD - SEA
Nonstop5h 52mDelta
Sat 28/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 31/5£241
Tue 13/807:30IAD - SEA
Nonstop5h 47mDelta
Tue 20/821:59SEA - IAD
Nonstop4h 57mDelta
Deal found 31/5£246
Sat 24/817:36IAD - SEA
Nonstop6h 03mDelta
Sun 8/921:59SEA - IAD
Nonstop4h 57mDelta
Deal found 31/5£249
Tue 13/807:30IAD - SEA
Nonstop5h 47mDelta
Sun 18/821:59SEA - IAD
Nonstop4h 57mDelta
Deal found 30/5£254
Wed 21/807:30IAD - SEA
Nonstop5h 47mDelta
Sun 25/821:59SEA - IAD
Nonstop4h 57mDelta
Deal found 30/5£273
Mon 15/707:25IAD - SEA
Nonstop5h 46mDelta
Fri 26/721:59SEA - IAD
Nonstop4h 57mDelta
Deal found 30/5£277

Dulles Intl to Seattle flights leaving soon

Find last-minute flight options from Dulles Intl to Seattle for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
Users seeking a last-minute flight from Washington, D.C. to Seattle should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.
Fri 7/612:33IAD - SEA
1 stop23h 29mSun Country Air
Mon 10/618:15SEA - IAD
1 stop13h 22mSun Country Air
Deal found 31/5£271
Tue 11/611:30IAD - SEA
1 stop7h 45mSun Country Air
Tue 18/612:13SEA - IAD
1 stop19h 13mSun Country Air
Deal found 1/6£275
Fri 7/612:33IAD - SEA
1 stop30h 22mSun Country Air
Tue 11/617:20SEA - IAD
1 stop14h 06mSun Country Air
Deal found 31/5£279
Fri 7/612:33IAD - SEA
1 stop23h 29mSun Country Air
Fri 14/623:59SEA - IAD
1 stop9h 58mSun Country Air
Deal found 1/6£295
Fri 7/612:33IAD - SEA
1 stop23h 29mSun Country Air
Sun 9/623:59SEA - IAD
1 stop6h 58mSun Country Air
Deal found 31/5£326
Thu 6/612:03IAD - SEA
1 stop23h 05mSun Country Air
Mon 10/618:15SEA - IAD
1 stop13h 22mSun Country Air
Deal found 31/5£330
Tue 11/609:05IAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 11/613:45SEA - IAD
1 stop12h 55mAlaska Airlines
Deal found 31/5£335
Fri 7/612:33IAD - SEA
1 stop30h 22mSun Country Air
Fri 21/623:59SEA - IAD
1 stop8h 45mSun Country Air
Deal found 31/5£338
Sun 9/613:43IAD - SEA
1 stop21h 19mSun Country Air
Wed 12/611:20SEA - IAD
1 stop21h 26mSun Country Air
Deal found 31/5£342

One-way flights to Seattle from Dulles Intl

Search for one-way flight options from Dulles Intl to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.
Users travelling one-way from Washington, D.C. to Seattle can select one of these great deals. Users in need of a round-trip flight from Washington, D.C. to Seattle instead should update the search form at the top of page.
Wed 18/907:30IAD - SEA
Nonstop5h 59mDelta
Deal found 1/6£109
Fri 5/707:30IAD - SEA
Nonstop5h 42mDelta
Deal found 1/6£114
Wed 4/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Deal found 1/6£116
Tue 23/711:32IAD - SEA
1 stop26h 40mSun Country Air
Deal found 31/5£120
Thu 4/716:16IAD - SEA
1 stop10h 28mAlaska Airlines
Deal found 31/5£121
Sun 14/712:27IAD - SEA
1 stop22h 45mSun Country Air
Deal found 1/6£128
Tue 9/712:00IAD - SEA
1 stop7h 59mSun Country Air
Deal found 31/5£132
Wed 3/711:23IAD - SEA
1 stop23h 32mSun Country Air
Deal found 30/5£136
Mon 14/1007:02IAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 31/5£141

Find flights from Dulles Intl to Seattle within your budget

Customise your flight search to find flights from Dulles Intl to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 909,873 searches. Data last updated 1 June 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£218 - £296

Route

Depart

Return

Price

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 21/8

Nonstop6h 03m

Seattle/Tacoma Intl

Wed 28/8

Nonstop4h 57m

£218

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 21/8

Nonstop5h 47m

Seattle/Tacoma Intl

Mon 26/8

Nonstop4h 57m

£222

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 21/8

1 stop10h 26m

Seattle/Tacoma Intl

Tue 27/8

Nonstop4h 53m

£225

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 19/8

Nonstop5h 47m

Seattle/Tacoma Intl

Mon 26/8

Nonstop4h 57m

£227

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 16/11

Nonstop5h 50m

Seattle/Tacoma Intl

Mon 18/11

1 stop8h 54m

£229

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 23/7

1 stop26h 40m

Seattle/Tacoma Intl

Tue 30/7

1 stop13h 50m

£232

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 16/7

1 stop10h 28m

Seattle/Tacoma Intl

Thu 18/7

Nonstop4h 52m

£234

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 10/7

1 stop25h 39m

Seattle/Tacoma Intl

Fri 12/7

1 stop18h 38m

£240

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 30/7

Nonstop5h 44m

Seattle/Tacoma Intl

Wed 7/8

Nonstop4h 59m

£296

Flights are sorted by cheapest first

Deals found on 31/5

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

Use this chart to determine the optimal time to book a return flight from Dulles Intl to Seattle. Price data was last updated on 31 May 2024.
The best time to book flights from Washington, D.C. Dulles Intl Airport to Seattle is 34 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

Best time to book a flight from Dulles Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Dulles Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

5 - 19 °C

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 1 June 2024.
See what other customers who have flown with United Airlines, Alaska Airlines and Delta from Washington, D.C. to Seattle have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very Good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Alaska Airlines
8.1
Very Good
9,198 reviews
Alaska Airlines
8.1
Very Good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Delta
8.0
Very Good
10,410 reviews
Alaska Airlines
8.1
Very Good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

United Airlines
7.4
Good
10,754 reviews
Alaska Airlines
8.1
Very Good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Sun Country Air
7.2
Good
592 reviews
Alaska Airlines
8.1
Very Good
9,198 reviews
Check prices

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.1

Entertainment

7.3

Crew

8.6

Reviews

1 / 10

There were no major issues. A bit of delay but it was understandable. It was a good experience otherwise.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Washington, D.C. Dulles Intl?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl is the airport most travelers will use when flying to Seattle from Washington, D.C. Dulles Intl. Booking flights from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 13 daily inbound flights from Washington, D.C. Dulles Intl from 0 different airlines.

  • Can I find flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300. The cheapest flight booked recently is on Delta for just £218, but on average you can expect to pay £241.

  • Are there nonstop flights from Washington, D.C. Dulles Intl Airport to Seattle for under £300 on Cheapflights?

    Cheapflights has at least 20 direct flights from Washington, D.C. Dulles Intl Airport to Seattle under £300. A good price for a nonstop flight from Washington, D.C. Dulles Intl Airport to Seattle is less than £278.

  • Are there last-minute flights available from Washington, D.C. Dulles Intl Airport to Seattle for under £300?

    There are currently 20+ open flights from Washington, D.C. Dulles Intl Airport to Seattle within the next 7 days for less than £300.

  • What days are direct flights available from Washington, D.C. Dulles Intl Airport to Seattle?

    You can find direct flights on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Saturday.

  • How many flights depart from Washington, D.C. Dulles Intl Airport to Seattle on average per day?

    On average, you can expect to see 17 flights from Washington, D.C. Dulles Intl Airport to Seattle a day.
    Morning (6am - Midday) - 71% of flight departures
    Evening (6pm - Midnight) - 29% of flight departures

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Seattle?

    Delta, Alaska Airlines, and Sun Country Air can get you from Washington, D.C. Dulles Intl Airport to Seattle in just under 6h 03m. Your travel time can differ by up to 20h 37m. The distance from Washington, D.C. Dulles Intl Airport to Seattle is about 2313 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Seattle round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Seattle is Delta. Our recent data shows that you can find tickets from as low as £218 on this airline. Additional options worth looking into are Alaska Airlines and Sun Country Air, starting at £225 and £232 round-trip. Delta is 28% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Seattle one-way?

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as £109. However, be on the lookout for offers from Alaska Airlines and Sun Country Air, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to Seattle for a low price.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to Seattle?

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Seattle are Japan Airlines (90%), United Airlines (87%) and Air Tahiti Nui (85%).

  • What does IAD to SEA mean?

    Great question - IAD to SEA just means Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Dulles Intl to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Dulles Intl to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Dulles Intl to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Dulles Intl to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from Dulles Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Seattle.

  • Can I find deals for business class flights from Dulles Intl to Seattle?

    Yes. Cheapflights offers flight deals from Dulles Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Dulles Intl to Seattle that allow pets onboard?

    Many airlines flying from Dulles Intl to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Dulles Intl to Seattle?

    Yes, you can often find last-minute deals on Dulles Intl to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Washington, D.C. Dulles Intl Airport to Seattle flight deals updated?

    The Washington, D.C. Dulles Intl Airport to Seattle flight deals you see on this page were last updated on 1/6.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Seattle?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seattle (average of £576). Flying from Washington, D.C. Dulles Intl Airport to Seattle in July is currently the most expensive (average of £809). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Search flights from Dulles Intl to Seattle by cabin class

Find flights from Dulles Intl to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from Dulles Intl to Seattle

Find hourly flight availability from Dulles Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 June 2024.
1%of flight departuresEarly morningMidnight to 6 am
30%of flight departuresMorning6 am to noon
65%of flight departuresAfternoonNoon to 6 pm
4%of flight departuresEvening6 pm to midnight
Midnight
6 AM
Midday
6 PM

Weekly flight availability from Dulles Intl to Seattle

Explore weekly flight availability from Dulles Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 1 June 2024.
Monday14daily flights
Tuesday11daily flights
Wednesday13daily flights
Thursday12daily flights
Friday15daily flights
Saturday14daily flights
Sunday14daily flights

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When you search for this flight from Dulles Intl to Seattle, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Dulles Intl to Seattle?

Cheapflights simply makes it quick and affordable to book flights from Dulles Intl to Seattle by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Dulles Intl to Seattle with no change fees?

Need flexible booking options for your flight to Seattle from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Dulles Intl to Seattle become cheaper?

Yes, Cheapflights offers price alerts on Dulles Intl to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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