Cheap Flights from Seattle (SEA) to Washington (DCA) from HK$1,281~

View HK$1,281 flight on Sun, 14 Dec 2025Opens in a new window

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

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Find Cheap Flights from Seattle (SEA) to Washington (DCA)

Prices were available within the past 7 days and start at HK$1,281 for one-way flights and HK$2,390 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$2,390 Return, found 4 days ago
HK$2,390
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$2,390 found 4 days ago
American Airlines
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$2,790 Return, found 4 days ago
HK$2,790
Return
found 4 days ago
Select American Airlines flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$2,790 found 4 days ago
Delta
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$2,908 Return, found 4 days ago
HK$2,908
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$2,908 found 4 days ago
United
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$2,929 Return, found 4 days ago
HK$2,929
Return
found 4 days ago
Select United flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$2,929 found 4 days ago
Delta
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$2,983 Return, found 4 days ago
HK$2,983
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$2,983 found 4 days ago
American Airlines
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$3,015 Return, found 4 days ago
HK$3,015
Return
found 4 days ago
Select American Airlines flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$3,015 found 4 days ago
United
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$3,024 Return, found 4 days ago
HK$3,024
Return
found 4 days ago
Select United flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$3,024 found 4 days ago
United
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$3,134 Return, found 4 days ago
HK$3,134
Return
found 4 days ago
Select United flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$3,134 found 4 days ago
American Airlines
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$3,177 Return, found 4 days ago
HK$3,177
Return
found 4 days ago
Select American Airlines flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$3,177 found 4 days ago
Delta
Thu, 4 Dec - Wed, 10 Dec
SEA
Seattle
DCA
Washington
HK$3,208 Return, found 4 days ago
HK$3,208
Return
found 4 days ago
Select Delta flight, departing Thu, 4 Dec from Seattle to Washington, returning Wed, 10 Dec, priced at HK$3,208 found 4 days ago

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

November is typically the cheapest month to fly

From HK$1,074 - HK$3,927 per traveller.

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 HK$2,390. 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 kilometers 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Return price
HK$2,390
Distance
3715 km
Average flight time
8 hours 4 mins

Book with confidence

Flights from Seattle to Washington

Book cheap flights from Seattle (SEA) to Washington (DCA) on Expedia.com.hk. Find the best flight deals to destinations around the world for your next leisure or business travel on Expedia.com.hk.

Search for flights from Seattle (SEA) to Washington (DCA) to find great flight deals suitable to your travel date and time. Expedia.com.hk flight booking search engine is simple to use and looking for cheap flights is as easy as a click of a mouse or on your mobile devices.

Be 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 (SEA) to Washington (DCA) trip. Call us at 3077-4857 (direct number - 24 hours day for English).

Save more when combine your Washington flight with a hotel for a package deal! Discover additional savings by booking in advance. Now you can find activities in Washington and things to do in Washington for your perfect vacation with Expedia Thing to Do.

If you would like to book flights to Washington more flexibly, many prefer to purchase one-way tickets with options to take different airlines. A one way ticket to Washington is HK$1,281 now!

 

Flights from Seattle to Washington

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