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Cheap flights from Seattle to Washington, D.C. from $101

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Washington, D.C. departing on 5/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Seattle to Washington, D.C..
Spirit Airlines Logo
3:20 pm - 6:10 amSEA-BWI
11h 50m1 stop
Spirit Airlines Logo
7:17 am - 2:25 pmBWI-SEA
10h 08m1 stop
$203Spirit Airlines
Find Deal
Sat, May 10 - Sat, May 17
Delta Logo
7:33 pm - 6:02 amSEA-BWI
7h 29m1 stop
Delta Logo
4:39 pm - 10:25 pmBWI-SEA
8h 46m1 stop
$207Delta
Find Deal
Tue, Sep 30 - Tue, Oct 14
Frontier Logo
6:00 am - 9:59 pmSEA-DCA
12h 59m1 stop
Frontier Logo
1:00 pm - 12:44 amDCA-SEA
14h 44m1 stop
$235Frontier
Find Deal
Sat, Apr 26 - Sat, May 3
Frontier Logo
6:00 am - 5:22 pmSEA-BWI
8h 22m1 stop
Frontier Logo
6:12 pm - 12:44 amBWI-SEA
9h 32m1 stop
$240Frontier
Find Deal
Mon, May 5 - Fri, May 9
Alaska Airlines Logo
9:40 pm - 5:46 amSEA-BWI
5h 06mnonstop
Alaska Airlines Logo
7:06 am - 9:45 amBWI-SEA
5h 39mnonstop
$277Alaska Airlines
Find Deal
Thu, May 1 - Sat, May 3
United Airlines Logo
7:17 pm - 5:22 amSEA-IAD
7h 05m1 stop
United Airlines Logo
12:55 pm - 7:01 pmIAD-SEA
9h 06m1 stop
$277United Airlines
Find Deal
Wed, Apr 23 - Tue, Apr 29
American Airlines Logo
12:59 am - 1:47 pmSEA-DCA
9h 48m1 stop
American Airlines Logo
5:00 am - 10:42 amDCA-SEA
8h 42m1 stop
$277American Airlines
Find Deal
Fri, May 2 - Wed, May 7
American Airlines Logo
12:59 am - 11:59 amSEA-DCA
8h 00m1 stop
American Airlines Logo
4:00 pm - 9:59 pmDCA-SEA
8h 59m1 stop
$278American Airlines
Find Deal
Fri, Apr 25 - Sat, May 3
Alaska Airlines Logo
3:36 pm - 5:40 amSEA-IAD
11h 04m1 stop
Alaska Airlines Logo
6:30 am - 9:13 amIAD-SEA
5h 43mnonstop
$279Alaska Airlines
Find Deal
Thu, May 1 - Wed, May 7
United Airlines Logo
8:50 am - 8:59 pmSEA-DCA
9h 09m2 stops
United Airlines Logo
6:00 pm - 10:42 pmDCA-SEA
7h 42m1 stop
$282United Airlines
Find Deal
Sat, May 3 - Wed, May 7

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

Our best Spirit Airlines deals on Seattle to Washington, D.C. flight tickets
Spirit Airlines
May 10
SEA3:20 pmSeattle/Tacoma Intl
11h 50m
1 stop
BWI6:10 amBaltimore/Washington
May 17
BWI7:17 amBaltimore/Washington
10h 08m
1 stop
SEA2:25 pmSeattle/Tacoma Intl
Spirit Airlines
Apr 30
SEA12:30 pmSeattle/Tacoma Intl
14h 16m
1 stop
BWI5:46 amBaltimore/Washington
May 4
BWI6:10 amBaltimore/Washington
15h 13m
1 stop
SEA6:23 pmSeattle/Tacoma Intl
Spirit Airlines
May 7
SEA3:20 pmSeattle/Tacoma Intl
11h 50m
1 stop
BWI6:10 amBaltimore/Washington
May 10
BWI7:17 amBaltimore/Washington
10h 08m
1 stop
SEA2:25 pmSeattle/Tacoma Intl

Delta flights from Seattle to Washington, D.C.

Our best Delta deals on Seattle to Washington, D.C. flight tickets
Delta
Sep 30
SEA7:33 pmSeattle/Tacoma Intl
7h 29m
1 stop
BWI6:02 amBaltimore/Washington
Oct 14
BWI4:39 pmBaltimore/Washington
8h 46m
1 stop
SEA10:25 pmSeattle/Tacoma Intl
Delta
Jul 14
SEA7:33 pmSeattle/Tacoma Intl
7h 33m
1 stop
BWI6:06 amBaltimore/Washington
Jul 24
BWI6:10 pmBaltimore/Washington
8h 58m
1 stop
SEA12:08 amSeattle/Tacoma Intl
Delta
Apr 26
SEA10:30 pmSeattle/Tacoma Intl
4h 50m
IAD6:20 amWashington, D.C. Dulles Intl
Apr 29
IAD7:25 amWashington, D.C. Dulles Intl
5h 55m
SEA10:20 amSeattle/Tacoma Intl

See travel insights to Washington, D.C. from

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

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 to Washington, D.C.?

The month of September is, on average, the cheapest month to fly to Washington, D.C. from Seattle, with most prices found around $319. If you’re not able to fly to Washington, D.C. in September, then October is your next best option. Flight prices from Seattle to Washington, D.C. during October average around $362.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Seattle is on a Thursday. momondo users have found tickets for Thursday departures for as low as $464. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Washington, D.C. for around $583.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the afternoon is the cheapest time of day to fly from Seattle to Washington, D.C. when you can find flight prices for as low as $393. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $562. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

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

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Seattle when booking 5 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $432 when searching 5 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Seattle for as low as $362 on momondo.

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

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

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

As of April 2025, prices for Seattle to Washington, D.C. flights are approximately 14% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

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

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

Best Price Found

$101

Fastest flight time

4h 50m

Direct flights

Every day

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Seattle in the past 72 hours is $101. The best round-trip flight deal from Seattle to Washington, D.C. found on momondo in the last 72 hours is $203.
The fastest flight from Seattle to Washington, D.C. takes 4h 50m
Direct flights go from Seattle to Washington, D.C. every day.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

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

    There are 2320.5 mi between Seattle/Tacoma Intl and Washington, D.C.. 4h 50m is a normal flight duration for this route.

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

    Prices for flights from Seattle/Tacoma Intl Airport to Washington, D.C. are updated daily.

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

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

    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 Seattle/Tacoma Intl Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The travel and health documents you'll need for your trip to Washington, D.C. may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington, D.C.. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Washington, D.C.?

  • What is the most popular airline from Seattle to Washington, D.C.?


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

Compare and see reviews for airlines that fly from Seattle to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $86Free CancellationRating
5.9
3,277 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $143Free CancellationRating
7.9
2,347 reviews
Search Hawaiian Airlines flights
Sun Country AirPriceFrom $169Free CancellationRating
6.9
349 reviews
Search Sun Country Air flights
Spirit AirlinesPriceFrom $178Free CancellationRating
6.3
7,890 reviews
Search Spirit Airlines flights
DeltaPriceFrom $196Free CancellationRating
8.0
7,897 reviews
Search Delta flights
American AirlinesPriceFrom $206Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $241Free CancellationRating
8.0
9,835 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $241Free CancellationRating
7.4
8,619 reviews
Search United Airlines flights
SouthwestPriceFrom $296Free CancellationRating
8.0
4,275 reviews
Search Southwest flights
  • Delta Flights From Seattle to Washington, D.C.

    Delta is one of the most popular airlines flying from Seattle to Washington, D.C., operating 14 flights/week on average for this route. A good Delta flight deal for Seattle to Washington, D.C. starts from $196 round-trip, up to an average price of $415. Our users have rated Delta at 8.0/10.

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

    Alaska Airlines (8.0/10 from 9,835 reviews) operates around 23 flights from Seattle to Washington, D.C. in any given week. The average Alaska Airlines airfare for this route is around $500, with deals from around $241 rare but found on momondo. Referenced prices are for round-trip Seattle to Washington, D.C. flight searches in the last 72 hours.


Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Gettysburg
National Harbor
Laurel
Silver Spring
Woodbridge
Tysons
Fredericksburg
Waldorf
Manassas
Gaithersburg
Glen Burnie
Linthicum Heights
Rockville
Fairfax
Towson
Reston
Hyattsville
Hanover

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from Seattle.

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

Flights from Seattle to Washington, D.C. with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once you have performed a search for Seattle to Washington, D.C. flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Price alerts on flights to Washington, D.C. from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


An easier way to manage your Washington, D.C. trip

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1 adult
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Wed 4/9
Wed 4/16

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.