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Cheap flights from Washington, D.C. Dulles Intl Airport to Seattle from £110

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 17/9. 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
21 May — 28 May1
1 adult
Tue 21/5
Tue 28/5

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 16 May 2024.

Popular in

June

Cheapest in

January

Round-trip from

£460

One-way from

£176
High demand for flights, 20% potential price rise
Best time to find cheap flights, 10% potential price drop
From Washington, D.C. Dulles Intl to Seattle/Tacoma Intl
One-way flight from Washington, D.C. Dulles Intl to Seattle/Tacoma Intl

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 61% 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 £428 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 £321 for the month, but tickets can be as low as £110. Due to multiple factors, prepare for potentially higher prices in June.

When is the cheapest time to fly from Washington, D.C. Dulles Intl Airport to Seattle (IAD - 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 Delta flights from Dulles Intl to Seattle

Explore cheap flight options specifically provided by Delta 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 844,321 searches. Data last updated 16 May 2024.
Peruse some of the lowest-priced Delta flights we've found from Washington, D.C. to Seattle. Make sure to double check the flight details before booking.
Sat 2/1117:20IAD - SEA
Nonstop5h 52mDelta
Tue 12/1122:00SEA - IAD
Nonstop4h 56mDelta
Deal found 15/5£219
Thu 31/1007:50IAD - SEA
Nonstop5h 54mDelta
Wed 13/1108:05SEA - IAD
Nonstop5h 06mDelta
Deal found 15/5£223
Thu 31/1017:20IAD - SEA
Nonstop5h 52mDelta
Mon 4/1122:00SEA - IAD
Nonstop4h 56mDelta
Deal found 15/5£228
Tue 20/817:50IAD - SEA
Nonstop5h 47mDelta
Tue 27/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 16/5£234
Tue 3/907:00IAD - SEA
Nonstop5h 34mDelta
Fri 20/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£239
Sat 21/917:20IAD - SEA
Nonstop5h 52mDelta
Sat 28/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£242
Thu 5/907:00IAD - SEA
Nonstop5h 34mDelta
Mon 16/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£244
Tue 13/807:00IAD - SEA
Nonstop5h 34mDelta
Tue 20/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 16/5£247
Fri 20/917:20IAD - SEA
Nonstop5h 52mDelta
Mon 23/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£263

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 844,321 searches. Data last updated 16 May 2024.
To aid your search, here are some of the cheapest United Airlines flights we've found from Washington, D.C. to Seattle. Deals are refreshing constantly so come back soon for more options.
Thu 6/617:23IAD - SEA
Nonstop5h 47mUnited Airlines
Mon 10/623:29SEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 16/5£307
Fri 16/822:10IAD - SEA
Nonstop5h 44mUnited Airlines
Fri 23/823:59SEA - IAD
1 stop8h 39mUnited Airlines
Deal found 16/5£315
Sat 17/818:15IAD - SEA
1 stop9h 37mUnited Airlines
Sat 24/808:53SEA - IAD
2 stops12h 06mUnited Airlines
Deal found 16/5£316
Fri 16/817:36IAD - SEA
1 stop8h 09mUnited Airlines
Sat 24/806:00SEA - IAD
2 stops11h 56mUnited Airlines
Deal found 16/5£321
Fri 16/806:30IAD - SEA
1 stop8h 47mUnited Airlines
Fri 23/818:45SEA - IAD
1 stop7h 39mUnited Airlines
Deal found 16/5£322
Thu 18/722:10IAD - SEA
Nonstop5h 44mUnited Airlines
Mon 22/722:30SEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 16/5£334
Wed 12/622:15IAD - SEA
Nonstop5h 44mUnited Airlines
Mon 1/700:30SEA - IAD
1 stop8h 22mUnited Airlines
Deal found 16/5£337
Tue 9/722:08IAD - SEA
1 stop12h 54mUnited Airlines
Thu 11/723:35SEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 15/5£344
Fri 14/622:15IAD - SEA
Nonstop5h 44mUnited Airlines
Tue 16/723:35SEA - IAD
Nonstop4h 59mUnited Airlines
Deal found 16/5£357

Cheap Dulles Intl to Seattle flights in May & June 2024

Find cheap flight options from Dulles Intl to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 844,321 searches. Prices were last updated on 16 May 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.
Mon 3/617:25IAD - SEA
1 stop20h 15mSun Country Air
Thu 13/618:18SEA - IAD
1 stop15h 39mSun Country Air
Deal found 16/5£225
Wed 26/611:16IAD - SEA
1 stop14h 38mSun Country Air
Tue 2/718:02SEA - IAD
1 stop13h 24mSun Country Air
Deal found 16/5£233
Sun 26/512:30IAD - SEA
1 stop22h 25mSun Country Air
Wed 29/517:45SEA - IAD
1 stop13h 47mSun Country Air
Deal found 16/5£241
Thu 30/508:30IAD - SEA
1 stop11h 30mSun Country Air
Sun 2/618:30SEA - IAD
1 stop19h 01mSun Country Air
Deal found 16/5£249
Mon 10/618:10IAD - SEA
Nonstop5h 40mAlaska Airlines
Tue 11/623:28SEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 15/5£250
Mon 10/618:10IAD - SEA
Nonstop5h 40mAlaska Airlines
Thu 13/623:38SEA - IAD
Nonstop4h 52mAlaska Airlines
Deal found 16/5£255
Mon 3/617:25IAD - SEA
1 stop20h 15mSun Country Air
Wed 5/617:15SEA - IAD
1 stop14h 58mSun Country Air
Deal found 16/5£256
Thu 30/508:30IAD - SEA
1 stop11h 30mSun Country Air
Wed 5/617:15SEA - IAD
1 stop14h 58mSun Country Air
Deal found 16/5£264
Sun 9/607:30IAD - SEA
Nonstop5h 44mDelta
Tue 11/621:55SEA - IAD
Nonstop5h 05mDelta
Deal found 16/5£266

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 844,321 searches. Data last updated 16 May 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.
Tue 10/916:13IAD - SEA
Nonstop5h 46mAlaska Airlines
Tue 17/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 16/5£219
Mon 19/818:37IAD - SEA
Nonstop5h 53mAlaska Airlines
Sat 31/807:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 16/5£223
Tue 9/712:00IAD - SEA
1 stop7h 59mSun Country Air
Fri 12/723:59SEA - IAD
1 stop18h 38mSun Country Air
Deal found 16/5£225
Wed 11/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Wed 25/916:06SEA - IAD
Nonstop4h 53mAlaska Airlines
Deal found 16/5£226
Fri 25/1007:50IAD - SEA
Nonstop5h 54mDelta
Sun 27/1008:05SEA - IAD
Nonstop5h 06mDelta
Deal found 16/5£228
Mon 26/817:57IAD - SEA
1 stop8h 45mAlaska Airlines
Sat 31/807:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 16/5£230
Wed 26/611:16IAD - SEA
1 stop14h 38mSun Country Air
Tue 2/718:02SEA - IAD
1 stop13h 24mSun Country Air
Deal found 16/5£233
Wed 4/907:00IAD - SEA
Nonstop5h 34mDelta
Tue 17/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£234
Thu 12/917:57IAD - SEA
1 stop8h 45mAlaska Airlines
Sat 14/906:00SEA - IAD
1 stop8h 53mAlaska Airlines
Deal found 16/5£238

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 844,321 searches. Data last updated 16 May 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.
Tue 10/907:50IAD - SEA
Nonstop5h 54mDelta
Tue 17/908:05SEA - IAD
Nonstop5h 06mDelta
Deal found 16/5£219
Mon 19/818:37IAD - SEA
Nonstop5h 53mAlaska Airlines
Sat 31/807:07SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 16/5£223
Fri 25/1007:50IAD - SEA
Nonstop5h 54mDelta
Sun 27/1008:05SEA - IAD
Nonstop5h 06mDelta
Deal found 16/5£228
Wed 4/907:00IAD - SEA
Nonstop5h 34mDelta
Tue 17/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£234
Tue 3/907:00IAD - SEA
Nonstop5h 34mDelta
Fri 20/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£239
Wed 4/907:00IAD - SEA
Nonstop5h 34mDelta
Sat 7/908:55SEA - IAD
Nonstop5h 10mDelta
Deal found 16/5£242
Thu 5/907:00IAD - SEA
Nonstop5h 34mDelta
Fri 20/922:00SEA - IAD
Nonstop4h 56mDelta
Deal found 16/5£244
Tue 13/807:00IAD - SEA
Nonstop5h 34mDelta
Tue 20/822:00SEA - IAD
Nonstop5h 05mDelta
Deal found 16/5£247
Mon 10/618:10IAD - SEA
Nonstop5h 40mAlaska Airlines
Tue 11/623:28SEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 15/5£250

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 844,321 searches. Data last updated 16 May 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.
Sun 26/512:30IAD - SEA
1 stop22h 25mSun Country Air
Wed 29/517:45SEA - IAD
1 stop13h 47mSun Country Air
Deal found 16/5£241
Sun 26/512:30IAD - SEA
1 stop22h 25mSun Country Air
Wed 5/617:15SEA - IAD
1 stop14h 58mSun Country Air
Deal found 16/5£264
Fri 24/519:20IAD - SEA
1 stop15h 20mSun Country Air
Fri 31/523:59SEA - IAD
1 stop17h 48mSun Country Air
Deal found 16/5£335
Fri 24/519:20IAD - SEA
1 stop15h 20mSun Country Air
Mon 27/523:59SEA - IAD
1 stop10h 03mSun Country Air
Deal found 16/5£351
Sun 26/507:00IAD - SEA
Nonstop5h 30mAlaska Airlines
Wed 5/616:00SEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 16/5£361
Sun 26/518:11IAD - SEA
1 stop7h 14mDelta
Wed 5/622:22SEA - IAD
Nonstop5h 04mDelta
Deal found 16/5£392
Sat 25/518:05IAD - SEA
1 stop21h 17mAlaska Airlines
Sun 26/516:00SEA - IAD
Nonstop4h 59mAlaska Airlines
Deal found 16/5£416
Sun 26/507:00IAD - SEA
Nonstop5h 30mAlaska Airlines
Tue 4/623:28SEA - IAD
Nonstop5h 12mAlaska Airlines
Deal found 16/5£433
Sat 25/516:19IAD - SEA
1 stop9h 35mAlaska Airlines
Sat 1/609:00SEA - IAD
Nonstop5h 08mAlaska Airlines
Deal found 16/5£440

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 844,321 searches. Data last updated 16 May 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.
Tue 17/916:13IAD - SEA
Nonstop5h 46mAlaska Airlines
Deal found 16/5£110
Mon 19/817:50IAD - SEA
Nonstop5h 47mDelta
Deal found 15/5£114
Wed 4/916:16IAD - SEA
1 stop10h 26mAlaska Airlines
Deal found 16/5£117
Mon 22/719:05IAD - SEA
1 stop24h 54mSun Country Air
Deal found 16/5£121
Mon 19/807:10IAD - SEA
1 stop9h 50mAlaska Airlines
Deal found 15/5£122
Sun 26/512:30IAD - SEA
1 stop22h 25mSun Country Air
Deal found 16/5£129
Tue 11/607:30IAD - SEA
Nonstop5h 44mDelta
Deal found 16/5£133
Mon 14/1007:02IAD - SEA
Nonstop5h 51mAlaska Airlines
Deal found 16/5£141
Wed 12/611:16IAD - SEA
1 stop8h 26mSun Country Air
Deal found 16/5£146

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 844,321 searches. Data last updated 16 May 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£219 - £307

Route

Depart

Return

Price

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 2/11

Nonstop5h 52m

Seattle/Tacoma Intl

Tue 12/11

Nonstop4h 56m

£219

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 31/10

Nonstop5h 54m

Seattle/Tacoma Intl

Wed 13/11

Nonstop5h 06m

£223

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Tue 9/7

1 stop7h 59m

Seattle/Tacoma Intl

Fri 12/7

1 stop18h 38m

£225

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 6/11

1 stop10h 48m

Seattle/Tacoma Intl

Wed 13/11

Nonstop4h 47m

£226

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 31/10

Nonstop5h 52m

Seattle/Tacoma Intl

Mon 4/11

Nonstop4h 56m

£228

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 26/8

1 stop8h 45m

Seattle/Tacoma Intl

Sat 31/8

Nonstop5h 08m

£230

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 22/7

1 stop24h 54m

Seattle/Tacoma Intl

Mon 29/7

1 stop7h 38m

£233

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 5/9

1 stop8h 45m

Seattle/Tacoma Intl

Thu 12/12

Nonstop5h 01m

£235

Washington, D.C. Dulles IntlSeattle/Tacoma Intl

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 6/6

Nonstop5h 47m

Seattle/Tacoma Intl

Mon 10/6

Nonstop4h 59m

£307

Flights are sorted by cheapest first

Deals found on 15/5

When is the best time to 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 10 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

Average price of flights to Seattle by month

Plan your trip from Dulles Intl to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from Dulles Intl to Seattle is currently £126 while a return flight costs £236. Price data was last updated on 12 May 2024.

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Seattle (average of £583). Flying from Washington, D.C. Dulles Intl Airport to Seattle in July is currently the most expensive (average of £799). 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.

January

£481

February

£469

March

£499

April

£513

May

£531

June

£604

July

£630

August

£605

September

£540

October

£518

November

£473

December

£460

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 16 May 2024.
See what other customers who have flown with Delta, United Airlines and Alaska Airlines 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.
8.1
Very Good
9,157 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.3

Crew

8.6

Overall

8.1

Reviews

1 / 10

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

8.1
Very Good
9,157 reviews
8.1
Very Good
9,157 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.3

Crew

8.6

Overall

8.1

Reviews

1 / 10

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

8.0
Very Good
10,673 reviews
8.1
Very Good
9,157 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.3

Crew

8.6

Overall

8.1

Reviews

1 / 10

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

7.4
Good
10,924 reviews
8.1
Very Good
9,157 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.3

Crew

8.6

Overall

8.1

Reviews

1 / 10

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

7.2
Good
630 reviews
8.1
Very Good
9,157 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Entertainment

7.3

Crew

8.6

Overall

8.1

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 £219, but on average you can expect to pay £238.

  • 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 £259.

  • 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, Thursday, Friday, 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 12 flights from Washington, D.C. Dulles Intl Airport to Seattle a day.
    Morning (6am - Midday) - 100% of flight departures

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

    Delta, Sun Country Air, and Alaska Airlines can get you from Washington, D.C. Dulles Intl Airport to Seattle in just under 5h 52m. Your travel time can differ by up to 4h 56m. 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 £219 on this airline. Additional options worth looking into are Sun Country Air and Alaska Airlines, starting at £225 and £226 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 Alaska Airlines, with whom users have recently found tickets for as low as £110. However, be on the lookout for offers from Delta 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 are the cheapest flights from Washington, D.C. Dulles Intl Airport to Seattle?

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Seattle? While on average our users pay £477, our data indicates the cheapest price to be £247. The most popular route (Washington, D.C. Dulles Intl - Seattle/Tacoma Intl), is priced around £353.

  • 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 16/5.

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