Alaska Airlines Washington D.C. to Seattle Flights

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Cheapflightsplus.com will find cheap Alaska Airlines flights from Washington D.C. to Seattle. Compare airline ticket prices and book air tickets starting from $149 from trusted online travel agencies, web sites and directly from airlines. Check flights schedule of Alaska Airlines, arrivals and departure details below.

Find Cheap Airfare Washington D.C. (DC) — Seattle (WA) by Alaska Airlines

To find cheap tickets choose a day of your departure with attractive price on the graph below and click «Find flights». For round trip flights please click «Check prices for return flight». The cheapest airfare is in february: one-way - $149, two-way – $256.

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Cheap Flights from Washington D.C. to Seattle by Alaska Airlines

Look at the list of plane tickets for the most popular direct and connecting flights by Alaska Airlines, their prices start from $149. The fastest nonstop flight takes 5h 55m. The fastest connecting flight — 18h 57m.

Price	Departure	Arrival	Flight Time	Airline	Flight
from $149 Find flight	7:00 am Washington D.C. Dulles International	9:56 am Seattle Seattle-Tacoma Intl	5h 56m	Alaska Airlines	AS308
from $235 Find flight	8:00 am Washington D.C. Ronald Reagan	10:58 am Seattle Seattle-Tacoma Intl	5h 58m	Alaska Airlines	AS1
from $235 Find flight	5:39 pm Washington D.C. Ronald Reagan	8:34 pm Seattle Seattle-Tacoma Intl	5h 55m	Alaska Airlines	AS3
from $243 Find flight	5:18 pm Washington D.C. Dulles International	9:23 am+1 день Seattle Seattle-Tacoma Intl	19h 5m layover 9h 56m - San Diego	Alaska Airlines	AS507 AS1245
from $287 Find flight	6:40 pm Washington D.C. Ronald Reagan	10:37 am+1 день Seattle Seattle-Tacoma Intl	18h 57m layover 11h 55m - Portland	Alaska Airlines	AS9 AS3362

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*Departure and arrival times are local. Prices are for one-way flights. Information refreshed on 02/05/2025

Alaska Airlines Flight Schedule Washington D.C. to Seattle

Below is a detailed 2025 flight schedule for today, tomorrow and all other days. It may vary depending on season and a day of the week of your desired trip. We recommend booking your itinerary at least 2 weeks prior your travel to get the best price and availability by the airline.

Departure	Flight Details	Flight Time	Price
5:18 pm — 9:23 am +1 day	5:10 pm — 7:47 pm AS507 Alaska Airlines Washington D.C. — San Diego 9h 56m stop 6:15 am — 9:24 am AS1245 Alaska Airlines San Diego — Seattle	19h 5m including layover	Find flight from$243
5:39 pm — 8:34 pm	5:39 pm — 8:34 pm AS3 Alaska Airlines Washington D.C. — Seattle	5h 55m	Find flight from$235
6:40 pm — 12:41 pm +1 day	6:40 pm — 9:45 pm AS9 Alaska Airlines Washington D.C. — Portland 13h 55m stop 11:40 am — 12:41 pm AS970 Alaska Airlines Portland — Seattle	21h 1m including layover	Find flight from$276
6:40 pm — 10:37 am +1 day	6:40 pm — 9:45 pm AS9 Alaska Airlines Washington D.C. — Portland 11h 55m stop 9:40 am — 10:37 am AS3362 Alaska Airlines Portland — Seattle	18h 57m including layover	Find flight from$287
7:00 am — 9:56 am	7:00 am — 9:56 am AS308 Alaska Airlines Washington D.C. — Seattle	5h 56m	Find flight from$149
8:00 am — 10:58 am	8:00 am — 10:58 am AS1 Alaska Airlines Washington D.C. — Seattle	5h 58m	Find flight from$235

Departure	Arrival	Flight Details	Flight Time	Price
		stop stop	including layover	Find flight from$

*Departure and arrival times are local. Last updated on 02/05/2025

Flight Information

There are 3 flights by Alaska Airlines from Washington D.C. to Seattle every week with departures from Ronald Reagan and Dulles International. All flights arrive at Seattle-Tacoma Intl, Boeing Field International Airport, Kenmore Air Harbor SPB.

Departures start from 5:18 pm to 8:00 am. Nonstop flight is 5h 55m. The time difference between Washington D.C. and Seattle is 3h.

The fastest flight 5h 55m
Average flight time 5h 56m
The earliest flight 5:18 pm
The latest flight 8:00 am
Distance 2321 ml

The cheapest months for traveling to Seattle are february (from 149 $), december (from 254 $), november (from 283 $).

The cheapest flight by Alaska Airlines that our users were able to find is $149. This airfare is economy class on one-way AS308 flight for February 21, 2025 leaving Dulles International in Washington D.C. at 7:00 am, it includes all taxes and additional fees.

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Alaska Airlines Airplanes on the Route

List of the most popular Alaska Airlines airplanes flying from Washington D.C. to Seattle:

Other Popular Airlines on the Route

Besides Alaska Airlines there are other 1 airline carriers between Washington D.C. and Seattle. Please review schedules and prices from the most popular airlines to find the best airfare deals from Washington D.C. to Seattle.

Nonstop flights

There are 4 direct flights every day from Washington D.C.. Airlines and fares are below:

UA - United Airlines

from $202

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Connecting Flights

List of flights with layovers (1 and more stops):

UA - United Airlines

from $212

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How to book an air ticket yourself?

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