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$129 Find Cheap Flights from District of Columbia to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 12/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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0 bags

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Good to know

Low season

January

High season

July

Cheapest flight

$129
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 20% increase in price.
Flight from Washington Dulles Airport to Seattle

FAQs for booking flights from District of Columbia to Seattle

  • How does KAYAK find such low prices on flights from District of Columbia to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from District of Columbia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from District of Columbia to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to District of Columbia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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Flights from District of Columbia to Seattle: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from District of Columbia to Seattle 
PaulFlew with Alaska AirlinesDCA-SEAOct 2024
DCA is much better than IAD. I am very happy with non-stop schedules for Alaska Air. Wish there were more flights in and out of DCA vs. IAD though.
Verified travelerFlew with Alaska AirlinesIAD-SEASep 2024
Pay the money if can afford to upgrade your seats
Verified travelerFlew with Alaska AirlinesIAD-SEAJul 2024
Dulles, like Seattle has a tram. That can be surprising. The TSA at Seattle is notoriously LONG, however, both times in the last year that I have flown, that has not been the case. At Dulles, the TSA lines were efficient as well. The airport interior is well marked for getting around. I did note that the garbages were full in the Southwest and Alaska areas- as we were there 6 hours and had lots of time to notice nit-picky things that nobody else would care about :). It was convenient to have a "charging station" nearby the Alaska waiting area (right across from our gate). It had 3 ports, and I noticed that as soon as I unplugged mine, it was jumped right on. Suggestion- have Dulles add a few more for passengers who need to recharge phones. Great experience, thank you.
PaulFlew with Alaska AirlinesDCA-SEAJun 2024
It's pricier to fly into Reagan (DCA), but if your destination is core DC area, it is well worth it. I used Ubers and Metro; no need to rent a car.
Verified travelerFlew with Alaska AirlinesDCA-SEAJul 2024
Alaska Air surprised me with the overall experience. I will use them again.
Verified travelerFlew with Alaska AirlinesDCA-SEAJul 2024
Be prepared Seattle is a mess as far as the overwhelming crowds when you land . The bus line to get your rental car is unbelievably long almost 100 people so be prepared once you arrive .
MarylinFlew with DeltaIAD-SEAMar 2024
Delta by far is a great airline, they’re fast and great staff. I just wish they had a little more snacks
Verified travelerFlew with Alaska AirlinesIAD-SEAMay 2024
Get to the airport early, especially on holidays

Prefer to fly non-stop from District of Columbia to Seattle?

Find which airlines fly direct from District of Columbia to Seattle/Tacoma Intl Airport, which days they fly and book direct flights.

Nonstop departures

District of Columbia to Seattle/Tacoma Intl

Monday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Tuesday

ANA, Aer Lingus, Aeromexico, +59 more

ANA, Aer Lingus, +60 more

Wednesday

ANA, Aer Lingus, Aeromexico, +63 more

ANA, Aer Lingus, +64 more

Thursday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Friday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Saturday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Sunday

ANA, Aer Lingus, Aeromexico, +64 more

ANA, Aer Lingus, +65 more

See more direct flights

Nonstop returns

Seattle/Tacoma Intl to District of Columbia

Monday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Tuesday

ANA, Aer Lingus, Aeromexico, +59 more

ANA, Aer Lingus, +60 more

Wednesday

ANA, Aer Lingus, Aeromexico, +63 more

ANA, Aer Lingus, +64 more

Thursday

ANA, Aer Lingus, Aeromexico, +60 more

ANA, Aer Lingus, +61 more

Friday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Saturday

ANA, Aer Lingus, Aeromexico, +61 more

ANA, Aer Lingus, +62 more

Sunday

ANA, Aer Lingus, Aeromexico, +64 more

ANA, Aer Lingus, +65 more

See more direct flights
See more direct flights

Book cheap flights from District of Columbia to Seattle

Recent round-trip flight deals

1/11Sat
nonstopDelta
6h 00mIAD-SEA
1/14Tue
nonstopDelta
5h 00mSEA-IAD
$257
1/9Thu
1 stopFrontier
11h 41mDCA-SEA
1/17Fri
1 stopFrontier
27h 44mSEA-DCA
$257
1/11Sat
nonstopUnited Airlines
6h 01mIAD-SEA
1/15Wed
1 stopUnited Airlines
10h 40mSEA-IAD
$262
2/1Sat
nonstopAlaska Airlines
6h 03mIAD-SEA
2/8Sat
1 stopAlaska Airlines
17h 33mSEA-IAD
$266
1/10Fri
1 stop
10h 19mDCA-SEA
1/13Mon
nonstop
4h 54mSEA-DCA
$268
1/7Tue
1 stopUnited Airlines
10h 00mIAD-SEA
1/14Tue
1 stopUnited Airlines
10h 40mSEA-IAD
$272
1/15Wed
nonstopAlaska Airlines
6h 03mIAD-SEA
1/20Mon
1 stopAlaska Airlines
16h 07mSEA-IAD
$276
1/15Wed
1 stopAmerican Airlines
9h 19mIAD-SEA
1/22Wed
2 stopsAmerican Airlines
11h 13mSEA-IAD
$281
12/17Tue
1 stopAmerican Airlines
10h 41mDCA-SEA
1/1Wed
1 stopAmerican Airlines
7h 28mSEA-DCA
$286
2/28Fri
1 stop
11h 12mDCA-SEA
3/5Wed
nonstop
4h 54mSEA-DCA
$292

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Recent one-way flight deals

12/10Tue
nonstopDelta
6h 10mIAD-SEA
$129
11/18Mon
1 stopFrontier
22h 15mDCA-SEA
$131
1/17Fri
1 stopJetBlue
10h 09mDCA-SEA
$134
12/10Tue
1 stopAlaska Airlines
10h 46mIAD-SEA
$138
12/14Sat
1 stopAmerican Airlines
8h 31mDCA-SEA
$138
1/14Tue
2 stopsUnited Airlines
11h 39mIAD-SEA
$143
12/14Sat
1 stopAlaska Airlines
19h 14mIAD-SEA
$144
1/7Tue
nonstopUnited Airlines
6h 01mIAD-SEA
$145
1/10Fri
2 stopsAmerican Airlines
10h 42mIAD-SEA
$153
1/17Fri
1 stopJetBlue
10h 09mDCA-SEA
$176

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Last minute flights from District of Columbia to Seattle

Last minute flight, train and bus deals

11/13Wed
multi-stopFrontier
28h 15mDCA-SEA
11/20Wed
multi-stopFrontier
12h 38mSEA-DCA
$237
11/15Fri
multi-stopFrontier
10h 09mDCA-SEA
11/17Sun
multi-stopFrontier
11h 17mSEA-DCA
$241
11/15Fri
multi-stop
10h 09mDCA-SEA
11/22Fri
nonstop
5h 06mSEA-DCA
$454
11/15Fri
nonstopUnited Airlines
6h 00mIAD-SEA
11/24Sun
nonstopUnited Airlines
4h 58mSEA-IAD
$567
11/15Fri
multi-stopUnited Airlines
9h 23mIAD-SEA
11/24Sun
nonstopUnited Airlines
4h 58mSEA-IAD
$577
11/15Fri
multi-stopAmerican Airlines
9h 44mDCA-SEA
11/23Sat
multi-stopAmerican Airlines
7h 39mSEA-DCA
$586
11/14Thu
multi-stopAmerican Airlines
12h 56mIAD-SEA
11/18Mon
multi-stopAmerican Airlines
15h 43mSEA-IAD
$590
11/15Fri
multi-stopSouthwest
12h 25mDCA-SEA
11/22Fri
multi-stopSouthwest
11h 05mSEA-DCA
$596
11/13Wed
multi-stop
9h 28mDCA-SEA
11/20Wed
multi-stop
20h 00mSEA-DCA
$609
11/15Fri
multi-stopSouthwest
12h 25mDCA-SEA
11/24Sun
multi-stopSouthwest
8h 45mSEA-DCA
$621

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Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle