Cheap flights from Washington, D.C. to Seattle from $137

Round-trip
1 adult
Economy
From?
To?
Sun 7/3
Sun 7/10

Deals available from 900+ travel sites.

Flight information for Washington, D.C. to Seattle
(WAS to SEA)

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Seattle

Best Price Found

$137

Fastest flight time

5h 44m

Direct flights

Wed, Thu, Fri, Sat and Sun

Airports in Seattle

3 airports
The best one-way flight to Seattle from Washington, D.C. in the past 72 hours is $137. The best round-trip flight deal from Washington, D.C. to Seattle found on momondo in the last 72 hours is $274.
The fastest flight from Washington, D.C. to Seattle takes 5h 44m
Direct flights go from Washington, D.C. to Seattle on Wednesday, Thursday, Friday, Saturday and Sunday. The only airline offering direct flights is Alaska Airlines.
There are 3 airports near Seattle: Seattle King County/Boeing (BFI), Seattle Lake Union Spb (LKE), Seattle/Tacoma Intl (SEA)

How to get the cheapest flight ticket from Washington, D.C. to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

October

The cheapest time of year to fly to Seattle from Washington, D.C. is October. Most expensive is June

What is the cheapest day to depart Washington, D.C. for Seattle?

Wednesday

The cheapest day of the week is typically Wednesday. The most expensive is typically Sunday

When is the cheapest time to fly from Washington, D.C. to Seattle?

in the evening

Washington, D.C. to Seattle flights are approximately 23% more expensive in the afternoon than in the evening

What is the cheapest airline that flies to Seattle from Washington, D.C.?

Juneyao Airlines

Alaska Airlines, American Airlines, and Delta are the most popular carriers operating from Washington, D.C. to Seattle

What is the cheapest Washington, D.C. to Seattle flight route?

Baltimore/Washington - Seattle/Tacoma Intl

Fly from Baltimore/Washington to Seattle/Tacoma Intl for the best Washington, D.C. - Seattle flight prices

How far in advance should you book Washington, D.C. to Seattle flights?

34 days before

The cheapest time to buy a flight from Washington, D.C. to Seattle is approximately 34 days to departure

If you are looking to fly from Washington, D.C. to Seattle, you are most likely going to fly from Washington, D.C. Dulles Intl Airport to Seattle/Tacoma Intl Airport, the most popular airports on that route. When booking your trip to Seattle, it is helpful to have an alternative airport to fly out of. The nearest airport to Washington, D.C. Dulles Intl Airport is Washington, D.C. Reagan-National Airport which is located in Washington, D.C.. In June, $294 is typically the cheapest round trip price you’ll find from Washington, D.C. to Seattle which you can find when you fly DCA — SEA.

Washington, D.C. Dulles Intl Airport (IAD) to Seattle/Tacoma Intl Airport (SEA)$327
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Washington, D.C. Reagan-National Airport (DCA) to Seattle/Tacoma Intl Airport (SEA)$294
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Easily compare round-trip flights from Washington, D.C. to Seattle

Below you can see the best fares for your round-trip flight route over the next three months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington, D.C. to Seattle by changing tabs
American Airlines
Nov 1
BWI1:15 amBaltimore/Washington
7h 50m
1 stop
SEA9:05 amSeattle/Tacoma Intl
Nov 8
SEA5:51 pmSeattle/Tacoma Intl
6h 48m
1 stop
BWI12:39 amBaltimore/Washington
Multiple Airlines
Nov 1
BWI1:15 amBaltimore/Washington
7h 50m
1 stop
SEA9:05 amSeattle/Tacoma Intl
Nov 5
SEA9:34 amSeattle/Tacoma Intl
6h 43m
1 stop
BWI4:17 pmBaltimore/Washington
Delta
Nov 5
BWI1:39 pmBaltimore/Washington
7h 23m
1 stop
SEA9:02 pmSeattle/Tacoma Intl
Nov 7
SEA7:30 pmSeattle/Tacoma Intl
6h 57m
1 stop
BWI2:27 amBaltimore/Washington
Spirit Airlines
Sep 21
BWI1:48 pmBaltimore/Washington
8h 37m
1 stop
SEA10:25 pmSeattle/Tacoma Intl
Sep 28
SEA9:08 amSeattle/Tacoma Intl
14h 10m
1 stop
BWI11:18 pmBaltimore/Washington
JetBlue
Nov 5
DCA12:30 pmWashington, D.C. Reagan-National
9h 19m
1 stop
SEA9:49 pmSeattle/Tacoma Intl
Nov 12
SEA6:59 pmSeattle/Tacoma Intl
9h 35m
1 stop
DCA4:34 amWashington, D.C. Reagan-National
Alaska Airlines
Oct 27
IAD3:00 amWashington, D.C. Dulles Intl
5h 55m
SEA8:55 amSeattle/Tacoma Intl
Oct 31
SEA12:00 pmSeattle/Tacoma Intl
4h 53m
IAD4:53 pmWashington, D.C. Dulles Intl

Find the cheapest one-way flights from Washington, D.C. to Seattle

If you're looking for one-way flights from Washington, D.C. to Seattle, view some of our deals below provided by Alaska Airlines, American Airlines and Delta
American Airlines
Sep 13
BWI9:36 amBaltimore/Washington
10h 29m
1 stop
SEA8:05 pmSeattle/Tacoma Intl
Delta
Sep 17
BWI1:41 pmBaltimore/Washington
7h 08m
1 stop
SEA8:49 pmSeattle/Tacoma Intl
Spirit Airlines
Sep 7
BWI1:48 pmBaltimore/Washington
8h 37m
1 stop
SEA10:25 pmSeattle/Tacoma Intl

Search last-minute flights to Seattle from Washington, D.C.

Find and compare round-trip flight prices for your last-minute flight from Washington, D.C. to Seattle
Multiple Airlines
Jul 7
BWI11:21 amBaltimore/Washington
20h 26m
2 stops
SEA7:47 amSeattle/Tacoma Intl
Jul 12
SEA8:27 amSeattle/Tacoma Intl
15h 03m
1 stop
BWI11:30 pmBaltimore/Washington
Spirit Airlines
Jul 7
BWI11:21 amBaltimore/Washington
22h 48m
2 stops
SEA10:09 amSeattle/Tacoma Intl
Jul 11
SEA8:27 amSeattle/Tacoma Intl
15h 03m
1 stop
BWI11:30 pmBaltimore/Washington
United Airlines
Jul 6
BWI2:41 amBaltimore/Washington
9h 35m
1 stop
SEA12:16 pmSeattle/Tacoma Intl
Jul 12
SEA6:53 amSeattle/Tacoma Intl
9h 30m
1 stop
BWI4:23 pmBaltimore/Washington
JetBlue
Jul 4
DCA2:30 amWashington, D.C. Reagan-National
8h 20m
1 stop
SEA10:50 amSeattle/Tacoma Intl
Jul 4
SEA6:53 pmSeattle/Tacoma Intl
9h 45m
1 stop
DCA4:38 amWashington, D.C. Reagan-National
Alaska Airlines
Jul 3
IAD7:30 amWashington, D.C. Dulles Intl
5h 44m
SEA1:14 pmSeattle/Tacoma Intl
Jul 7
SEA12:00 pmSeattle/Tacoma Intl
4h 59m
IAD4:59 pmWashington, D.C. Dulles Intl
Delta
Jul 6
IAD1:34 pmWashington, D.C. Dulles Intl
5h 47m
SEA7:21 pmSeattle/Tacoma Intl
Jul 13
SEA7:55 amSeattle/Tacoma Intl
7h 54m
1 stop
IAD3:49 pmWashington, D.C. Dulles Intl

Best airlines flying from Washington, D.C. to Seattle

Compare and see reviews for airlines that fly from Washington, D.C. to Seattle with momondo
AirlineRatingFree CancellationPrice
Juneyao AirlinesPriceFrom $16Free CancellationRating
0.0
Search Juneyao Airlines flights
American AirlinesPriceFrom $106Free CancellationRating
7.0
7.4

Boarding

7.1

Comfort

8.0

Crew

6.8

Entertainment

6.4

Food

Reviews

The staff were great, but they lost my luggage and my flight got delayed 6 hours.

1 / 10
Search American Airlines flights
FrontierPriceFrom $115Free CancellationRating
6.2
6.4

Boarding

5.8

Comfort

7.0

Crew

4.7

Entertainment

5.0

Food

Reviews

Thé flight was on time

1 / 10
Search Frontier flights
Alaska AirlinesPriceFrom $127Free CancellationRating
7.9
8.2

Boarding

7.9

Comfort

8.5

Crew

7.2

Entertainment

7.1

Food

Reviews

Movies/screens

1 / 10
Search Alaska Airlines flights
DeltaPriceFrom $128Free CancellationRating
7.8
7.9

Boarding

8.0

Comfort

8.3

Crew

7.7

Entertainment

7.3

Food

Reviews

The food was just ok

1 / 10
Search Delta flights
United AirlinesPriceFrom $158Free CancellationRating
7.2
7.5

Boarding

7.1

Comfort

8.0

Crew

6.9

Entertainment

6.5

Food

Reviews

First off....... In June 2022 Canada is still trying to flatten the curve. We had to wear masks for ~ 10 hours flying across the pond and listen to snarky comments from crew "cover your nose", while everyone went without a mask for the 1-2 hour plus meal service, absolutely ridiculous! I would recommend avoiding Canada until they understand that the world has moved on in the understanding of COVID-19 as an endemic virus. Second, all of the Air Canada flights were late or delayed due to low staffing. We were also left waiting on the tarmac for several hours due to problems with airport infrastructure, meaning-they could not find someone to extend the jetway to the plane, causing us to nearly miss our connection.... 45 minutes sitting 20 feet from the airport, major fail. Third, the Canadian officials were a bit cunty, I was very surprised, I traveled to Canada often prior to the pandemic and was always greeted with a smile and a laugh.... those days are over, or on hold while thy continue to battle the virus. On to the Middle East for more history. Cheers!

1 / 10
Search United Airlines flights
JetBluePriceFrom $167Free CancellationRating
6.9
7.1

Boarding

7.4

Comfort

7.7

Crew

7.0

Entertainment

6.5

Food

Reviews

JetBlue lacks free food offerings on long flights, and even their more meal oriented boxes for purchase which "are available on flights longer than 4 hours" have not been available on the last 4 flights over 4 hours that I have flown with them

1 / 10
Search JetBlue flights
  • Alaska Airlines Flights From Washington, D.C. to Seattle

    Alaska Airlines flies from Washington, D.C. to Seattle around 16 times per week, with 668 momondo users rating the airline 7.9/10. The cheapest Alaska Airlines deal from Washington, D.C. to Seattle in the last 72 hours was $127 (round-trip), much lower than the average airfare cost of $334 for Alaska Airlines flights on this route.

  • Delta Flights From Washington, D.C. to Seattle

    Across 392 Delta reviews on momondo, the average score is 7.8/10. Delta flies from Washington, D.C. to Seattle about 1 time each week, with ticket deals ranging from $128 to $366. Price data is based on momondo searches in the last 72 hours.


American Airlines flights from Washington, D.C. to Seattle

Our best American Airlines deals on Washington, D.C. to Seattle flight tickets
American Airlines
Nov 1
BWI1:15 amBaltimore/Washington
7h 50m
1 stop
SEA9:05 amSeattle/Tacoma Intl
Nov 8
SEA5:51 pmSeattle/Tacoma Intl
6h 48m
1 stop
BWI12:39 amBaltimore/Washington
American Airlines
Oct 11
BWI2:15 amBaltimore/Washington
9h 17m
1 stop
SEA11:32 amSeattle/Tacoma Intl
Oct 18
SEA6:16 pmSeattle/Tacoma Intl
9h 56m
1 stop
BWI4:12 amBaltimore/Washington
American Airlines
Sep 20
IAD7:20 amWashington, D.C. Dulles Intl
9h 33m
1 stop
SEA4:53 pmSeattle/Tacoma Intl
Sep 27
SEA6:16 pmSeattle/Tacoma Intl
9h 10m
1 stop
IAD3:26 amWashington, D.C. Dulles Intl

Delta flights from Washington, D.C. to Seattle

Our best Delta deals on Washington, D.C. to Seattle flight tickets
Delta
Nov 5
BWI1:39 pmBaltimore/Washington
7h 23m
1 stop
SEA9:02 pmSeattle/Tacoma Intl
Nov 7
SEA7:30 pmSeattle/Tacoma Intl
6h 57m
1 stop
BWI2:27 amBaltimore/Washington
Delta
Oct 1
BWI1:41 pmBaltimore/Washington
7h 08m
1 stop
SEA8:49 pmSeattle/Tacoma Intl
Oct 8
SEA5:25 amSeattle/Tacoma Intl
9h 41m
1 stop
BWI3:06 pmBaltimore/Washington
Delta
Oct 8
BWI1:39 pmBaltimore/Washington
7h 23m
1 stop
SEA9:02 pmSeattle/Tacoma Intl
Oct 14
SEA8:30 pmSeattle/Tacoma Intl
6h 57m
1 stop
BWI3:27 amBaltimore/Washington

  • Are airlines flying from Washington, D.C. to Seattle/Tacoma Intl offering flexible cancellation due to COVID-19?

    Some of our partner airlines flying from Washington, D.C. to Seattle/Tacoma Intl are adopting new policies due to the global impact of COVID-19. Some of the airlines that may be waiving their cancellation fees are Alaska Airlines, United Airlines, and Delta. You can search for the full list of airlines like Alaska Airlines that are offering this flexibility.

  • How far is Washington, D.C. to Seattle/Tacoma Intl by plane?

    The straight-line distance from Washington, D.C. to Seattle/Tacoma Intl is 2320.5 mi. 5h 45m is a normal flight duration for this route.



Alternative routes for Washington, D.C. to Seattle

Compare alternative flights to and from nearby airports and cities to discover the best prices and most convenient flight times
Washington, D.C. to Spokane Flights
Fastest flight time6h 50m
Cheapest price$372

Similar Washington, D.C. to Seattle flights

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Why use momondo?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Seattle for you.

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momondo provides multiple filters to help you find the best flight to Seattle from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Washington, D.C. and alert you when they change.


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