Cheap Flights from Washington D.C. to Seattle
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Flights from Washington D.C. to Seattle
Flight deals from Washington D.C. to Seattle
We've found these cheap flights for you. You can book one-way or return flight tickets.
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Round-trip
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One way
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Cheapest nonstop
IAD 06:305h 40mDirectSEA 09:10Washington D.C. - Seattle | Tue, May 27 | Alaska Airlines
SEA 23:305h 6mDirectIAD 07:36Seattle - Washington D.C. | Tue, Jun 3 | Alaska Airlines€201 €24418% OFF18% OFF€244 €201 -
DCA 17:005h 56mDirectSEA 19:56Washington D.C. - Seattle | Tue, Jun 3 | Alaska Airlines
SEA 23:305h 6mDirectIAD 07:36Seattle - Washington D.C. | Tue, Jun 10 | Alaska Airlines€203 €24417% OFF17% OFF€244 €203
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 6 | Frontier Airlines
SEA 06:0012h 59m1 stopsDCA 21:59Seattle - Washington D.C. | Tue, May 13 | Frontier Airlines€129 €24447% OFF47% OFF€244 €129 -
DCA 07:0020h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Wed, May 7 | Frontier Airlines
SEA 06:0012h 59m1 stopsDCA 21:59Seattle - Washington D.C. | Tue, May 13 | Frontier Airlines€14541% OFF€244 €145
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DCA 13:0014h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Mon, May 5 | Frontier Airlines
SEA 06:0027h 7m1 stopsDCA 12:07Seattle - Washington D.C. | Sun, May 11 | Frontier Airlines€14640% OFF€244 €146
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 3 | Frontier Airlines
SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, May 10 | Frontier Airlines€15337% OFF€244 €153
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 17 | Frontier Airlines
SEA 06:257h 34m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, May 24 | Frontier Airlines€16234% OFF€244 €162
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 10 | Frontier Airlines
SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Mon, May 12 | Frontier Airlines€16234% OFF€244 €162
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DCA 07:0019h 37m1 stopsSEA 23:37Washington D.C. - Seattle | Tue, Jun 3 | Frontier Airlines
SEA 06:2512h 34m1 stopsDCA 21:59Seattle - Washington D.C. | Tue, Jun 10 | Frontier Airlines€16532% OFF€244 €165
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 13 | Frontier Airlines
SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Thu, May 15 | Frontier Airlines€16632% OFF€244 €166
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Mon, May 12 | Frontier Airlines
SEA 06:2426h 43m1 stopsDCA 12:07Seattle - Washington D.C. | Wed, May 14 | Frontier Airlines€16731% OFF€244 €167
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DCA 18:008h 49m1 stopsSEA 23:49Washington D.C. - Seattle | Wed, May 14 | Frontier Airlines
SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Tue, May 20 | Frontier Airlines€16831% OFF€244 €168
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WAS 13:0017h 25m1 stopsSEA Invalid DateWashington D.C. - Seattle | Mon, May 5 | Normal Airline
SEA 15:006hDirectWAS 16:00Seattle - Washington D.C. | Wed, May 7 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
IAD 06:305h 40mDirectSEA 09:10Washington D.C. - Seattle | Tue, Jun 10 | Alaska Airlines€100 €28565% OFF65% OFF€285 €100
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IAD 09:005h 39mDirectSEA 11:39Washington D.C. - Seattle | Sat, May 31 | Alaska Airlines€100 €28565% OFF65% OFF€285 €100
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 13 | Frontier Airlines€72 €28575% OFF75% OFF€285 €72
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 6 | Frontier Airlines€7275% OFF€285 €72
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DCA 18:009h 34m1 stopsSEA 00:34Washington D.C. - Seattle | Sat, Jun 7 | Frontier Airlines€8072% OFF€285 €80
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DCA 18:008h 58m1 stopsSEA 23:58Washington D.C. - Seattle | Wed, Jun 4 | Frontier Airlines€8172% OFF€285 €81
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DCA 18:008h 49m1 stopsSEA 23:49Washington D.C. - Seattle | Tue, May 20 | Frontier Airlines€10663% OFF€285 €106
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 17 | Frontier Airlines€11659% OFF€285 €116
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 10 | Frontier Airlines€11957% OFF€285 €119
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 3 | Frontier Airlines€13154% OFF€285 €131
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DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Mon, May 5 | Frontier Airlines€20428% OFF€285 €204
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DCA 18:008h 49m1 stopsSEA 23:49Washington D.C. - Seattle | Wed, May 7 | Frontier Airlines€23617% OFF€285 €236
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WAS 13:0017h 25m1 stopsSEA Invalid DateWashington D.C. - Seattle | Mon, May 5 | Normal AirlineFind More FlightsFind More Flights
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.
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Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Washington D.C. to Seattle
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FAQ
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When are flight tickets from Washington D.C. (WAS) to Seattle (SEA) the cheapest?
Airlines adjust prices for flights from Washington D.C. to Seattle based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays. -
How much are flights from Washington D.C. (WAS) to Seattle (SEA) cost?
According to Trip.com's data, the lowest price is around €347. -
How long is the flight from Washington D.C. (WAS) to Seattle (SEA)?
It takes about 6 hours 8 minutes to fly from Washington D.C. (WAS) to Seattle (SEA). -
What are the most popular airlines that fly from Washington D.C. (WAS) to Seattle (SEA)?
Airlines with flights from Washington D.C. (WAS) to Seattle (SEA): United Airlines, Delta Air Lines, Air Tahiti Nui, Alaska Airlines, Hawaiian Airlines, Brussels Airlines, Qatar Airways, Lufthansa, Austrian Airlines, Ethiopian Airlines, Japan Airlines, Korean Air, Copa Airlines and avianca. -
How many airports in Seattle (SEA)?
There are 3 airport(s) in Seattle (SEA): King County (Boeing Field) International Airport, Lake Union Sea Plane Base and Seattle–Tacoma International Airport.
How to find a cheap flight from Washington D.C. to Seattle
Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Washington D.C. to Seattle. Book your flights at the right time and save more.
Be flexible with your travel dates to get the cheapest flight from Washington D.C. to Seattle.
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Washington D.C. to Seattle over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Tue, Jun 10, with one-way flights priced at just €100.
Compare cheap flight deals from Washington D.C. to Seattle across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Washington D.C. to Seattle. The cheapest airline for this route is Alaska Airlines.
Set up a Price Alert
By setting up a Price Alert for your journey from Washington D.C. to Seattle, you can easily keep an eye on ticket prices without having to check every day.
Don't miss out on cheap flight deals and promo codes from Washington D.C. to Seattle.
You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.
Book early or wait until the last minute.
It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.
Search for flights on the go.
For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from Washington D.C. to Seattle and snag some exclusive deals just for you.
Flight Information from Washington D.C. to Seattle
| Cheapest one-way flight price | €71 |
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| Cheapest return ticket price | €191 |
| Off-season travel month | March |
| Peak season for travel | June |
| Flight distance | 3,736.07km |
| Average flight time | 6 hours 8 minutes |
| Popular airline | Alaska Airlines |
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