฿6,845 Cheap Flights from Seattle (SEA) to Washington (DCA)

View ฿6,845 flight on Sat, 20 Jun 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at ฿6,845 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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 . 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.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Ronald Reagan Washington National
Distance
3715 km
Average flight time
8 hours 4 mins
*Available to Expedia members.