S$236 Cheap Flights from Seattle to Washington

View S$236 flight on Wed, 29 Oct, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Ronald Reagan Washington National Airport (DCA)

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Cheap Flights from Seattle to Washington (SEA-DCA)

Prices were available within the past 7 days and start at S$236 for one-way flights and S$504 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$504 Return, found 5 days ago
S$504
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$504 found 5 days ago
United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$510 Return, found 5 days ago
S$510
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$510 found 5 days ago
Delta
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$511 Return, found 5 days ago
S$511
Return
found 5 days ago
Select Delta flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$511 found 5 days ago
Delta
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$517 Return, found 5 days ago
S$517
Return
found 5 days ago
Select Delta flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$517 found 5 days ago
American Airlines
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$536 Return, found 5 days ago
S$536
Return
found 5 days ago
Select American Airlines flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$536 found 5 days ago
United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$536 Return, found 5 days ago
S$536
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$536 found 5 days ago
United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$542 Return, found 5 days ago
S$542
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$542 found 5 days ago
American Airlines
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$556 Return, found 5 days ago
S$556
Return
found 5 days ago
Select American Airlines flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$556 found 5 days ago
United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$562 Return, found 5 days ago
S$562
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$562 found 5 days ago
United
Thu, 11 Sep - Wed, 17 Sep
SEA
Seattle
DCA
Washington
S$574 Return, found 5 days ago
S$574
Return
found 5 days ago
Select United flight, departing Thu, 11 Sep from Seattle to Washington, returning Wed, 17 Sep, priced at S$574 found 5 days ago

Find the cheapest month to fly from Seattle (SEA) to Washington (DCA)

September is typically the cheapest month to fly

From S$177 - S$377 per traveller.

Graph displaying average flight prices per month

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Seattle to Washington route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Return price
S$504
Distance
3715 km

Flights from Seattle to Washington

There are several airlines that operate frequent flights from Seattle (SEA) to Washington D.C. (DCA) including

The earliest flight leaves Seattle Tacoma Intl. Airport at 08:00 and arrives at Ronald Reagan Washington National Airport at 16:07. The last flight of the day departs Seattle at 14:10 and arrives at Washington D.C. at 21:59.

The flight distance from Seattle to Washington D.C. is about 3757 km, the shortest flight is 04 hours 48 minutes with .

Expedia lets you search across the largest number of airlines and Washington flights, which means that you’ll be able to find a great flight deal at the perfect travel date and time. Our simple-to-use booking engine makes looking for terrific bargains easy and hassle-free; just enter your travel dates and departure city, and let Expedia do the rest! Adjust your travel dates and explore connecting flights to find an even better deal on your Seattle Washington flight!

Browse through dozens of options and rest assured that you’re seeing the best price guaranteed! Our friendly customer service representatives are here to serve you 24 hours day to provide assistance and answer any questions that you may have about booking your Seattle to Washington trip. There’s simply no substitute for great prices suited to your travel needs and backed by excellent customer support.

Combine your Washington flight with a hotel and/or car rental for a package deal designed to save you even more money! Discover additional savings by booking in advance or find a last minute deal. There are tons of ways to save on your flights from Seattle to Washington with Expedia. Use us as your stop travel destination and have the confidence that you’re getting a bargain!

Frequently asked questions

How much is a flight from SEA to National Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey between Seattle - Tacoma Intl. Airport (SEA) and National Airport was S$504. Great fares don't stick around for long, so book yours today. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Sea-Tac Airport to DCA?
Every air carrier has its own set of terms and conditions. If you decide to cancel your trip, visit our Customer Service Portal.
How do I find cheap flights from Sea-Tac Airport to Ronald Reagan Washington National Airport (DCA) that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for SEA to National Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from Sea-Tac Airport to Ronald Reagan Washington National Airport (DCA)?
Around 3,700 kilometres separates SeaTac and Arlington, so pack something to keep you occupied for a couple of hours. That latest bestseller you've yet to start will be ideal.
Which airlines fly direct from SEA to Ronald Reagan Washington National Airport (DCA)?
Flying nonstop from SEA to National Airport is easy with Alaska Airlines (AS). This top airline operates 60 flights every month.
Are SEA to National Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices from Seattle - Tacoma Intl. Airport (SEA) to DCA are available up to a year prior to departure on Expedia. And although you may nab a fantastic last-minute deal, it's never something you can count on. Also, booking your flights well in advance means you'll have more options — and you can avoid getting trapped in the dreaded middle seat! We frequently update our fares to bring you the biggest bargains, so check back often for all the latest specials.

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