S$176 Cheap Flights from Seattle to Washington

View S$176 flight on Sat, 30 Aug, 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$176 for one-way flights and S$356 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 26 Aug - Tue, 2 Sep
SEA
Seattle
DCA
Washington
S$356 Return, found 4 days ago
S$356
Return
found 4 days ago
Select Delta flight, departing Tue, 26 Aug from Seattle to Washington, returning Tue, 2 Sep, priced at S$356 found 4 days ago
Delta
Thu, 14 Aug - Sat, 16 Aug
SEA
Seattle
DCA
Washington
S$368 Return, found 5 days ago
S$368
Return
found 5 days ago
Select Delta flight, departing Thu, 14 Aug from Seattle to Washington, returning Sat, 16 Aug, priced at S$368 found 5 days ago
Delta
Wed, 6 Aug - Tue, 12 Aug
SEA
Seattle
DCA
Washington
S$375 Return, found 2 days ago
S$375
Return
found 2 days ago
Select Delta flight, departing Wed, 6 Aug from Seattle to Washington, returning Tue, 12 Aug, priced at S$375 found 2 days ago
Delta
Thu, 14 Aug - Mon, 18 Aug
SEA
Seattle
DCA
Washington
S$394 Return, found 2 days ago
S$394
Return
found 2 days ago
Select Delta flight, departing Thu, 14 Aug from Seattle to Washington, returning Mon, 18 Aug, priced at S$394 found 2 days ago
Delta
Tue, 19 Aug - Tue, 26 Aug
SEA
Seattle
DCA
Washington
S$406 Return, found 2 days ago
S$406
Return
found 2 days ago
Select Delta flight, departing Tue, 19 Aug from Seattle to Washington, returning Tue, 26 Aug, priced at S$406 found 2 days ago
Delta
Thu, 21 Aug - Fri, 29 Aug
SEA
Seattle
DCA
Washington
S$432 Return, found 1 day ago
S$432
Return
found 1 day ago
Select Delta flight, departing Thu, 21 Aug from Seattle to Washington, returning Fri, 29 Aug, priced at S$432 found 1 day ago
Delta
Fri, 29 Aug - Fri, 5 Sep
SEA
Seattle
DCA
Washington
S$445 Return, found 21 hours ago
S$445
Return
found 21 hours ago
Select Delta flight, departing Fri, 29 Aug from Seattle to Washington, returning Fri, 5 Sep, priced at S$445 found 21 hours ago
American Airlines
Sat, 23 Aug - Sat, 30 Aug
SEA
Seattle
DCA
Washington
S$454 Return, found 6 days ago
S$454
Return
found 6 days ago
Select American Airlines flight, departing Sat, 23 Aug from Seattle to Washington, returning Sat, 30 Aug, priced at S$454 found 6 days ago
United
Wed, 6 Aug - Tue, 12 Aug
SEA
Seattle
DCA
Washington
S$464 Return, found 2 days ago
S$464
Return
found 2 days ago
Select United flight, departing Wed, 6 Aug from Seattle to Washington, returning Tue, 12 Aug, priced at S$464 found 2 days ago
United
Tue, 19 Aug - Tue, 26 Aug
SEA
Seattle
DCA
Washington
S$471 Return, found 2 days ago
S$471
Return
found 2 days ago
Select United flight, departing Tue, 19 Aug from Seattle to Washington, returning Tue, 26 Aug, priced at S$471 found 2 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$330 per traveller.

Graph displaying average flight prices per month

Seattle to Washington route information
Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Airlines serving
American Airlines, Delta, United
Return price
S$356
Distance
3715 km
Average flight time
8 hours 6 mins

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$356. 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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