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Cheap flights from Washington, D.C. to Seattle from $66

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Seattle departing on 8/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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Tue 7/30
Tue 8/6

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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 six months. All fares were found on momondo this week. Browse the quickest and cheapest flights from Washington, D.C. to Seattle by changing tabs
Spirit Airlines
Aug 14
BWI4:30 pmBaltimore/Washington
20h 39m
2 stops
SEA10:09 amSeattle/Tacoma Intl
Aug 20
SEA3:03 pmSeattle/Tacoma Intl
16h 53m
2 stops
BWI10:56 amBaltimore/Washington
Frontier
Sep 21
DCA12:59 pmWashington, D.C. Reagan-National
10h 47m
1 stop
SEA8:46 pmSeattle/Tacoma Intl
Sep 24
SEA9:01 amSeattle/Tacoma Intl
9h 58m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
Multiple Airlines
Sep 5
BWI2:31 pmBaltimore/Washington
9h 15m
1 stop
SEA8:46 pmSeattle/Tacoma Intl
Sep 9
SEA5:30 amSeattle/Tacoma Intl
12h 46m
1 stop
BWI9:16 pmBaltimore/Washington
American Airlines
Sep 5
DCA12:59 pmWashington, D.C. Reagan-National
13h 22m
2 stops
SEA11:21 pmSeattle/Tacoma Intl
Sep 11
SEA9:50 amSeattle/Tacoma Intl
11h 00m
2 stops
DCA11:50 pmWashington, D.C. Reagan-National
JetBlue
Sep 5
DCA12:30 pmWashington, D.C. Reagan-National
13h 07m
2 stops
SEA10:37 pmSeattle/Tacoma Intl
Sep 11
SEA11:47 pmSeattle/Tacoma Intl
10h 53m
2 stops
DCA1:40 pmWashington, D.C. Reagan-National
Alaska Airlines
Sep 5
IAD5:38 pmWashington, D.C. Dulles Intl
9h 06m
1 stop
SEA11:44 pmSeattle/Tacoma Intl
Sep 11
SEA4:06 pmSeattle/Tacoma Intl
4h 53m
IAD11:59 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, Frontier and JetBlue
Spirit Airlines
Aug 27
BWI7:00 amBaltimore/Washington
14h 17m
2 stops
SEA6:17 pmSeattle/Tacoma Intl
Frontier
Sep 26
BWI2:31 pmBaltimore/Washington
9h 15m
1 stop
SEA8:46 pmSeattle/Tacoma Intl
JetBlue
Sep 3
DCA2:30 pmWashington, D.C. Reagan-National
35h 07m
2 stops
SEA10:37 pmSeattle/Tacoma Intl

Find the cheapest direct flights from Washington, D.C. to Seattle

Alaska Airlines
Sep 13
IAD7:09 pmWashington, D.C. Dulles Intl
5h 51m
SEA10:00 pmSeattle/Tacoma Intl
Sep 18
SEA7:07 amSeattle/Tacoma Intl
5h 09m
IAD3:16 pmWashington, D.C. Dulles Intl
Delta
Sep 5
IAD5:36 pmWashington, D.C. Dulles Intl
6h 03m
SEA8:39 pmSeattle/Tacoma Intl
Sep 11
SEA9:55 pmSeattle/Tacoma Intl
5h 06m
IAD6:01 amWashington, D.C. Dulles Intl
United Airlines
Sep 3
IAD8:55 amWashington, D.C. Dulles Intl
5h 48m
SEA11:43 amSeattle/Tacoma Intl
Sep 7
SEA10:50 pmSeattle/Tacoma Intl
5h 05m
IAD6:55 amWashington, D.C. Dulles Intl
Alaska Airlines
Aug 31
IAD7:09 pmWashington, D.C. Dulles Intl
5h 51m
SEA10:00 pmSeattle/Tacoma Intl
Sep 5
SEA7:07 amSeattle/Tacoma Intl
5h 09m
IAD3:16 pmWashington, D.C. Dulles Intl
United Airlines
Sep 19
IAD12:40 pmWashington, D.C. Dulles Intl
5h 48m
SEA3:28 pmSeattle/Tacoma Intl
Sep 22
SEA10:50 pmSeattle/Tacoma Intl
5h 05m
IAD6:55 amWashington, D.C. Dulles Intl
Delta
Aug 19
IAD7:25 amWashington, D.C. Dulles Intl
5h 46m
SEA10:11 amSeattle/Tacoma Intl
Aug 28
SEA9:59 pmSeattle/Tacoma Intl
4h 57m
IAD5:56 amWashington, D.C. Dulles 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
Spirit Airlines
Aug 4
BWI9:57 pmBaltimore/Washington
16h 44m
1 stop
SEA11:41 amSeattle/Tacoma Intl
Aug 13
SEA5:10 amSeattle/Tacoma Intl
15h 40m
2 stops
BWI11:50 pmBaltimore/Washington
Multiple Airlines
Aug 4
BWI9:57 pmBaltimore/Washington
16h 44m
1 stop
SEA11:41 amSeattle/Tacoma Intl
Aug 7
SEA8:00 amSeattle/Tacoma Intl
26h 16m
1 stop
BWI1:16 pmBaltimore/Washington
Frontier
Aug 3
DCA6:59 pmWashington, D.C. Reagan-National
16h 38m
1 stop
SEA8:37 amSeattle/Tacoma Intl
Aug 28
SEA8:57 pmSeattle/Tacoma Intl
12h 12m
1 stop
DCA12:09 pmWashington, D.C. Reagan-National
Spirit Airlines
Jul 30
BWI7:20 pmBaltimore/Washington
8h 15m
1 stop
SEA12:35 amSeattle/Tacoma Intl
Aug 21
SEA7:23 pmSeattle/Tacoma Intl
8h 40m
1 stop
BWI7:03 amBaltimore/Washington
Delta
Aug 4
IAD7:25 amWashington, D.C. Dulles Intl
5h 46m
SEA10:11 amSeattle/Tacoma Intl
Sep 10
SEA9:55 pmSeattle/Tacoma Intl
5h 06m
IAD6:01 amWashington, D.C. Dulles Intl
Spirit Airlines
Aug 3
BWI5:31 pmBaltimore/Washington
20h 08m
2 stops
SEA10:39 amSeattle/Tacoma Intl
Aug 21
SEA4:18 pmSeattle/Tacoma Intl
23h 54m
3 stops
BWI7:12 pmBaltimore/Washington

JetBlue flights from Washington, D.C. to Seattle

Our best JetBlue deals on Washington, D.C. to Seattle flight tickets
JetBlue
Sep 5
DCA12:30 pmWashington, D.C. Reagan-National
13h 07m
2 stops
SEA10:37 pmSeattle/Tacoma Intl
Sep 11
SEA11:47 pmSeattle/Tacoma Intl
10h 53m
2 stops
DCA1:40 pmWashington, D.C. Reagan-National
JetBlue
Oct 25
DCA12:30 pmWashington, D.C. Reagan-National
11h 05m
1 stop
SEA8:35 pmSeattle/Tacoma Intl
Oct 27
SEA10:28 pmSeattle/Tacoma Intl
9h 17m
1 stop
DCA10:45 amWashington, D.C. Reagan-National

Delta flights from Washington, D.C. to Seattle

Our best Delta deals on Washington, D.C. to Seattle flight tickets
Delta
Sep 13
IAD7:25 amWashington, D.C. Dulles Intl
5h 54m
SEA10:19 amSeattle/Tacoma Intl
Sep 17
SEA8:55 amSeattle/Tacoma Intl
5h 05m
IAD5:00 pmWashington, D.C. Dulles Intl
Delta
Sep 5
IAD5:36 pmWashington, D.C. Dulles Intl
6h 03m
SEA8:39 pmSeattle/Tacoma Intl
Sep 11
SEA9:55 pmSeattle/Tacoma Intl
5h 06m
IAD6:01 amWashington, D.C. Dulles Intl
Delta
Oct 3
IAD5:55 pmWashington, D.C. Dulles Intl
5h 45m
SEA8:40 pmSeattle/Tacoma Intl
Oct 7
SEA10:00 pmSeattle/Tacoma Intl
4h 56m
IAD5:56 amWashington, D.C. Dulles Intl

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?

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

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

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

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

At noon. Washington, D.C. to Seattle flights are approximately 30% more expensive in the morning than at noon

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

Frontier. Frontier, JetBlue, and Spirit Airlines 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?

41 days before. The cheapest time to buy a flight from Washington, D.C. to Seattle is approximately 41 days to departure

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

As of July 2024, 19 flights take off from Washington, D.C. and land in Seattle each day. The most common flight departure time for this route is 7:00AM, with 56% of daily flights taking off at noon.

How many flights depart from Washington, D.C. to Seattle on average per week?

As of July 2024, there are 135 flights per week flying from Washington, D.C. to Seattle. The most common day of the week flights depart is Friday, with 16% of flights taking off on this day.

What cabin class options are available on Washington, D.C. to Seattle flights?

There are 4 cabin classes available to choose from on Washington, D.C. to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. to Seattle flights?

You could potentially save up to 36% on your flight if you consider stops on a Washington, D.C. to Seattle flight.

How have Washington, D.C. to Seattle flight prices changed over time?

As of July 2024, prices for Washington, D.C. to Seattle flights are approximately 15% cheaper when compared to flights at the same time last year.

Cheap Washington, D.C. to Seattle (WAS to SEA) flight deals and tips

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

Best Price Found

$66

Fastest flight time

5h 35m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Washington, D.C. in the past 72 hours is $66. The best round-trip flight deal from Washington, D.C. to Seattle found on momondo in the last 72 hours is $125.
The fastest flight from Washington, D.C. to Seattle takes 5h 35m
Direct flights go from Washington, D.C. to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

  • 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 35m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Washington, D.C. to Seattle/Tacoma Intl Airport?

    Prices for flights from Washington, D.C. to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Washington, D.C. to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The necessary travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


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
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $98Free CancellationRating
6.2
3,835 reviews
Search Frontier flights
JetBluePriceFrom $119Free CancellationRating
7.6
3,996 reviews
Search JetBlue flights
DeltaPriceFrom $139Free CancellationRating
8.0
9,630 reviews
Search Delta flights
Alaska AirlinesPriceFrom $144Free CancellationRating
8.0
9,365 reviews
Search Alaska Airlines flights
Sun Country AirPriceFrom $144Free CancellationRating
7.0
515 reviews
Search Sun Country Air flights
Spirit AirlinesPriceFrom $170Free CancellationRating
6.3
8,407 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $210Free CancellationRating
7.4
10,000 reviews
Search United Airlines flights
American AirlinesPriceFrom $223Free CancellationRating
7.3
10,000 reviews
Search American Airlines flights
  • Delta Flights From Washington, D.C. to Seattle

    Delta flies from Washington, D.C. to Seattle around 5 times per week, with 9,630 momondo users rating the airline 8.0/10. The cheapest Delta deal from Washington, D.C. to Seattle in the last 72 hours was $139 (round-trip), much lower than the average airfare cost of $434 for Delta flights on this route.

  • Alaska Airlines Flights From Washington, D.C. to Seattle

    Across 9,365 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Washington, D.C. to Seattle about 19 times each week, with ticket deals ranging from $144 to $483. Price data is based on momondo searches in the last 72 hours.


Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Seattle?

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.

Can I find flights from Washington, D.C. to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Washington, D.C. to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Washington, D.C. to Seattle?

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.

I’m not ready to book a flight from Washington, D.C. to Seattle right now. Can momondo alert me if prices change?

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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