RM486 Cheap Flights from Washington (DCA) to Seattle (SEA)

View RM486 flight on Sat, 24 Jan 2026Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to Seattle

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Cheap Flights from Washington to Seattle (DCA-SEA)

Prices were available within the past 7 days and start at RM486 for one-way flights and RM1,762 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM1,762 Return, found 1 day ago
RM1,762
Return
found 1 day ago
Select Delta flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM1,762 found 1 day ago
Delta
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM1,803 Return, found 1 day ago
RM1,803
Return
found 1 day ago
Select Delta flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM1,803 found 1 day ago
Delta
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM1,844 Return, found 1 day ago
RM1,844
Return
found 1 day ago
Select Delta flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM1,844 found 1 day ago
United
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM1,966 Return, found 1 day ago
RM1,966
Return
found 1 day ago
Select United flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM1,966 found 1 day ago
American Airlines
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM2,007 Return, found 1 day ago
RM2,007
Return
found 1 day ago
Select American Airlines flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM2,007 found 1 day ago
United
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM2,047 Return, found 1 day ago
RM2,047
Return
found 1 day ago
Select United flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM2,047 found 1 day ago
Delta
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM2,128 Return, found 1 day ago
RM2,128
Return
found 1 day ago
Select Delta flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM2,128 found 1 day ago
Delta
Thu, 22 Jan - Wed, 28 Jan
DCA
Washington
SEA
Seattle
RM2,169 Return, found 1 day ago
RM2,169
Return
found 1 day ago
Select Delta flight, departing Thu, 22 Jan from Washington to Seattle, returning Wed, 28 Jan, priced at RM2,169 found 1 day ago

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

May is typically the cheapest month to fly

From RM 661 - RM 2,031 per traveller.

Frequently asked questions

How much is a flight from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA)?
Round-trip flights from National Airport to Sea-Tac Airport start from RM1,762. This price is based on fares advertised within the last 7 days on Expedia for flights departing within the next year — book today to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from National Airport to Sea-Tac Airport?
The majority of flights can be conveniently cancelled online, but whether or not you incur a fee varies between airlines. If you do have to cancel your getaway, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport 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 Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport flights, you'll see a "no change fees" filter for you to select.
How far is the flight from DCA to Sea-Tac Airport?
It's around 3,700 kilometres from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA), so you'll be strapped into your seat for a while. Keep yourself entertained with things like your e-reader or the latest bestseller.
Which airlines fly direct from National Airport to Seattle - Tacoma Intl. Airport (SEA)?
Check out the fares with Alaska Airlines (AS) if you want to fly straight from Ronald Reagan Washington National Airport (DCA) to Sea-Tac Airport. This popular carrier operates 60 flights monthly, so you're sure to find one that suits your schedule.
Are Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Late planners can sometimes score a bargain, with some of the cheapest airfares from Ronald Reagan Washington National Airport (DCA) to Seattle - Tacoma Intl. Airport (SEA) showing up a few weeks before the date of departure. If you'd rather book ahead, Expedia compares and updates the best flight deals continually — as early as a year in advance in some cases. It depends on the carrier though, as not all airlines advertise prices that far in advance.

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Return price
RM1,762
Distance
3715 km
Average flight time
2 hours 59 mins

Book with confidence

Perfect flights from Washington to Seattle

Your Journey from Washington to Seattle

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Experience the Vibrant Seattle

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*Note: Prices may vary based on availability and are subject to change.
Perfect flights from Washington to Seattle

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