฿4,055 Cheap Flights from Washington (DCA) to Seattle (SEA)

View ฿4,055 flight on Thu, 26 Feb 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at ฿4,055 for one-way flights and ฿6,865 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 26 Feb - Thu, 5 Mar
DCA
Washington
SEA
Seattle
฿6,865 Return, found 6 days ago
฿6,865
Return
found 6 days ago
Select Delta flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 5 Mar, priced at ฿6,865 found 6 days ago
Delta
Fri, 6 Feb - Sat, 14 Feb
DCA
Washington
SEA
Seattle
฿6,970 Return, found 2 days ago
฿6,970
Return
found 2 days ago
Select Delta flight, departing Fri, 6 Feb from Washington to Seattle, returning Sat, 14 Feb, priced at ฿6,970 found 2 days ago
Delta
Thu, 26 Feb - Thu, 5 Mar
DCA
Washington
SEA
Seattle
฿7,180 Return, found 6 days ago
฿7,180
Return
found 6 days ago
Select Delta flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 5 Mar, priced at ฿7,180 found 6 days ago
Delta
Fri, 6 Feb - Sat, 14 Feb
DCA
Washington
SEA
Seattle
฿7,285 Return, found 2 days ago
฿7,285
Return
found 2 days ago
Select Delta flight, departing Fri, 6 Feb from Washington to Seattle, returning Sat, 14 Feb, priced at ฿7,285 found 2 days ago
Delta
Thu, 26 Feb - Thu, 12 Mar
DCA
Washington
SEA
Seattle
฿7,495 Return, found 6 days ago
฿7,495
Return
found 6 days ago
Select Delta flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 12 Mar, priced at ฿7,495 found 6 days ago
Delta
Thu, 26 Feb - Thu, 5 Mar
DCA
Washington
SEA
Seattle
฿8,115 Return, found 6 days ago
฿8,115
Return
found 6 days ago
Select Delta flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 5 Mar, priced at ฿8,115 found 6 days ago
Delta
Thu, 26 Feb - Thu, 5 Mar
DCA
Washington
SEA
Seattle
฿8,430 Return, found 6 days ago
฿8,430
Return
found 6 days ago
Select Delta flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 5 Mar, priced at ฿8,430 found 6 days ago
Delta
Fri, 6 Feb - Sat, 14 Feb
DCA
Washington
SEA
Seattle
฿8,840 Return, found 2 days ago
฿8,840
Return
found 2 days ago
Select Delta flight, departing Fri, 6 Feb from Washington to Seattle, returning Sat, 14 Feb, priced at ฿8,840 found 2 days ago
United
Thu, 26 Feb - Thu, 5 Mar
DCA
Washington
SEA
Seattle
฿9,680 Return, found 6 days ago
฿9,680
Return
found 6 days ago
Select United flight, departing Thu, 26 Feb from Washington to Seattle, returning Thu, 5 Mar, priced at ฿9,680 found 6 days ago
American Airlines
Fri, 6 Feb - Sat, 14 Feb
DCA
Washington
SEA
Seattle
฿9,830 Return, found 2 days ago
฿9,830
Return
found 2 days ago
Select American Airlines flight, departing Fri, 6 Feb from Washington to Seattle, returning Sat, 14 Feb, priced at ฿9,830 found 2 days ago

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

May is typically the cheapest month to fly

From ฿5,122 - ฿15,732 per traveller.
Flight from Washington to Seattle route information
Origin airport
Ronald Reagan Washington National
Destination airport
Seattle - Tacoma Intl.
Airlines serving
American Airlines, Delta, United
Return price
฿6,865
Distance
3715 km
Average flight time
3 hours 4 mins

Perfect flights from Washington to Seattle

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Washington to Seattle. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Ronald Reagan Washington National to Seattle - Tacoma Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿4,055 and roundtrip prices from ฿6,865. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Seattle - Tacoma Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Seattle.

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 ฿6,865. 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.
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