Cheap Flights from Seattle to Washington D.C.
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Flights from Seattle to Washington D.C.
Flight deals from Seattle to Washington D.C.
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
SEA 22:304h 51mNonstopIAD 06:21Seattle - Washington D.C. | Tue, Apr 22 | Delta Air Lines
IAD 07:255h 55mNonstopSEA 10:20Washington D.C. - Seattle | Thu, Apr 24 | Delta Air Lines£146 £21331% OFF31% OFF£213 £146 -
SEA 21:404h 54mNonstopIAD 05:34Seattle - Washington D.C. | Tue, Apr 15 | Alaska Airlines
IAD 07:255h 55mNonstopSEA 10:20Washington D.C. - Seattle | Wed, Apr 23 | Delta Air Lines£157 £21326% OFF26% OFF£213 £157 -
SEA 12:2120h 46m1 stopsDCA 12:07Seattle - Washington D.C. | Thu, May 1 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 6 | Frontier Airlines£106 £21350% OFF50% OFF£213 £106 -
SEA 06:0027h 7m1 stopsDCA 12:07Seattle - Washington D.C. | Wed, Apr 30 | Frontier Airlines
DCA 13:0014h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Mon, May 5 | Frontier Airlines£11148% OFF£213 £111
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SEA 06:0027h 9m1 stopsDCA 12:09Seattle - Washington D.C. | Sun, Apr 27 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, Apr 29 | Frontier Airlines£11646% OFF£213 £116
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SEA 06:0027h 9m1 stopsDCA 12:09Seattle - Washington D.C. | Wed, Apr 23 | Frontier Airlines
DCA 07:0020h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Wed, Apr 30 | Frontier Airlines£11645% OFF£213 £116
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Tue, Apr 29 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Tue, May 6 | Frontier Airlines£12243% OFF£213 £122
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SEA 06:0027h 9m1 stopsDCA 12:09Seattle - Washington D.C. | Tue, Apr 22 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, Apr 26 | Frontier Airlines£12242% OFF£213 £122
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SEA 06:0012h 59m1 stopsDCA 21:59Seattle - Washington D.C. | Fri, Apr 25 | Frontier Airlines
DCA 07:0020h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, Apr 26 | Frontier Airlines£12641% OFF£213 £126
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SEA 06:0027h 7m1 stopsDCA 12:07Seattle - Washington D.C. | Sat, May 3 | Frontier Airlines
DCA 07:0020h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Wed, May 7 | Frontier Airlines£12740% OFF£213 £127
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Mon, Apr 28 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Thu, May 1 | Frontier Airlines£13338% OFF£213 £133
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SEA 06:247h 35m1 stopsDCA 16:59Seattle - Washington D.C. | Wed, May 7 | Frontier Airlines
DCA 18:009h 44m1 stopsSEA 00:44Washington D.C. - Seattle | Sat, May 10 | Frontier Airlines£13337% OFF£213 £133
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SEA 13:0017h 25m1 stopsWAS Invalid DateSeattle - Washington D.C. | Tue, Apr 15 | Normal Airline
WAS 15:006hNonstopSEA 16:00Washington D.C. - Seattle | Thu, Apr 17 | Normal AirlineFind More FlightsFind More Flights
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Cheapest nonstop
SEA 16:004h 58mNonstopIAD 23:58Seattle - Washington D.C. | Tue, May 13 | Hawaiian Airlines£92 £12727% OFF27% OFF£127 £92 -
SEA 07:355h 15mNonstopDCA 15:50Seattle - Washington D.C. | Tue, May 13 | Delta Air Lines£94 £12726% OFF26% OFF£127 £94
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SEA 06:0027h 9m1 stopsDCA 12:09Seattle - Washington D.C. | Wed, Apr 23 | Frontier Airlines£56 £12756% OFF56% OFF£127 £56
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SEA 06:0012h 59m1 stopsDCA 21:59Seattle - Washington D.C. | Tue, May 13 | Frontier Airlines£5656% OFF£127 £56
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Wed, Apr 30 | Frontier Airlines£6946% OFF£127 £69
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Tue, May 6 | Frontier Airlines£7045% OFF£127 £70
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SEA 06:247h 35m1 stopsDCA 16:59Seattle - Washington D.C. | Wed, May 7 | Frontier Airlines£7045% OFF£127 £70
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, May 17 | Frontier Airlines£7045% OFF£127 £70
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, Apr 26 | Frontier Airlines£7045% OFF£127 £70
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, May 10 | Frontier Airlines£7045% OFF£127 £70
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SEA 06:007h 59m1 stopsDCA 16:59Seattle - Washington D.C. | Sat, May 3 | Frontier Airlines£7144% OFF£127 £71
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SEA 06:0012h 59m1 stopsDCA 21:59Seattle - Washington D.C. | Thu, May 1 | Frontier Airlines£7244% OFF£127 £72
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SEA 13:0017h 25m1 stopsWAS Invalid DateSeattle - Washington D.C. | Tue, Apr 15 | 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 Seattle to Washington D.C.
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FAQ
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When are flight tickets from Seattle (SEA) to Washington D.C. (WAS) the cheapest?
Airlines adjust prices for flights from Seattle to Washington D.C. 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 Seattle (SEA) to Washington D.C. (WAS) cost?
According to Trip.com's data, the lowest price is around £303. -
How long is the flight from Seattle (SEA) to Washington D.C. (WAS)?
It takes about 5 hours 47 minutes to fly from Seattle (SEA) to Washington D.C. (WAS). -
What are the most popular airlines that fly from Seattle (SEA) to Washington D.C. (WAS)?
Airlines with flights from Seattle (SEA) to Washington D.C. (WAS): United Airlines, Delta Air Lines, Singapore Airlines, Korean Air, Alaska Airlines, Air Tahiti Nui, Austrian Airlines, Hawaiian Airlines, Lufthansa and Qatar Airways. -
How many airports in Washington D.C. (WAS)?
There are 2 airport(s) in Washington D.C. (WAS): Ronald Reagan Washington National Airport and Dulles International Airport.
How to find a cheap flight from Seattle to Washington D.C.
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 Seattle to Washington D.C.. Book your flights at the right time and save more.
Be flexible with your travel dates to get the cheapest flight from Seattle to Washington D.C..
Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from Seattle to Washington D.C. 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, May 13, with one-way flights priced at just £92.
Compare cheap flight deals from Seattle to Washington D.C. across hundreds of airlines.
With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from Seattle to Washington D.C.. The cheapest airline for this route is Hawaiian Airlines.
Set up a Price Alert
By setting up a Price Alert for your journey from Seattle to Washington D.C., 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 Seattle to Washington D.C..
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 Seattle to Washington D.C. and snag some exclusive deals just for you.
Flight Information from Seattle to Washington D.C.
| Cheapest one-way flight price | £55 |
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| Cheapest return ticket price | £145 |
| Off-season travel month | February |
| Peak season for travel | June |
| Flight distance | 3,736.07km |
| Average flight time | 5 hours 47 minutes |
| Popular airline | Alaska Airlines |
Plan Your Trip Around Washington D.C.
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