Cheap Flights from Washington D.C., DC to Seattle, WA from $89

On Cheapflightsplus.com you will find 18 direct and 135 connecting flights from Washington D.C. to Seattle. You can compare airfare deals from 7 airlines and multiple travel sites from $89, book and save on cheap plane tickets and last minute offers. Also check out WAS-SEA flight schedule to find best flight time, convenient departure and arrival airports.

Find One-Way and Round-Trip Washington D.C. to Seattle Flight Deals

To find the cheapest one way airline ticket select the date with the lowest price on the calendar below and click «Find Flights». To search for round-trip flight deals click on the link «Check prices for return flights» and select the date of the return flight. Cheapest flights in November: $89 (one-way), $153 (round-trip).
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Full flight schedule will help you in detecting at what time planes fly from Washington D.C. to Seattle. You can also specify the concrete flights and airlines on the route and how long the flight actually is. Use the calendar for today, tomorrow or other specific date as some flights are available only on certain days of the week.
Departure Arrival Flight Details Flight Duration Price
06:30 — 09:10
06:30 — 09:10 AS308 Alaska Airlines
Washington D.C. — Seattle
5h 40m
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from$139
07:00 — 09:38
07:00 — 09:38 HA4967 Hawaiian Airlines
Washington D.C. — Seattle
5h 38m
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from$102
07:00 — 09:38
07:00 — 09:38 AS351 Alaska Airlines
Washington D.C. — Seattle
5h 38m
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from$104
08:00 — 10:39
08:00 — 10:39 AS1 Alaska Airlines
Washington D.C. — Seattle
5h 39m
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from$220
09:00 — 11:38
09:00 — 11:38 AS375 Alaska Airlines
Washington D.C. — Seattle
5h 38m
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from$104
09:00 — 11:38
09:00 — 11:38 HA4968 Hawaiian Airlines
Washington D.C. — Seattle
5h 38m
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from$117
09:00 — 11:50
09:00 — 11:50 UA1734 United Airlines
Washington D.C. — Seattle
5h 50m
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from$157
09:00 — 11:50
09:00 — 11:50 UA2729 United Airlines
Washington D.C. — Seattle
5h 50m
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from$157
13:05 — 15:51
13:05 — 15:51 UA1914 United Airlines
Washington D.C. — Seattle
5h 46m
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from$140
13:05 — 15:53
13:05 — 15:53 UA1395 United Airlines
Washington D.C. — Seattle
5h 48m
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from$157
17:06 — 19:56
17:06 — 19:56 HA6703 Hawaiian Airlines
Washington D.C. — Seattle
5h 50m
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from$102
17:06 — 19:56
17:06 — 19:56 AS3 Alaska Airlines
Washington D.C. — Seattle
5h 50m
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from$104
17:55 — 20:42
17:55 — 20:42 UA326 United Airlines
Washington D.C. — Seattle
5h 47m
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from$140
18:09 — 20:51
18:09 — 20:51 HA4836 Hawaiian Airlines
Washington D.C. — Seattle
5h 42m
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from$102
18:09 — 20:51
18:09 — 20:51 AS416 Alaska Airlines
Washington D.C. — Seattle
5h 42m
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from$105
18:13 — 21:00
18:13 — 21:00 HA4969 Hawaiian Airlines
Washington D.C. — Seattle
5h 47m
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from$110
18:13 — 21:00
18:13 — 21:00 AS406 Alaska Airlines
Washington D.C. — Seattle
5h 47m
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from$121
22:06 — 00:56
+1 day
22:06 — 00:56 UA716 United Airlines
Washington D.C. — Seattle
5h 50m
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from$156
06:35 — 11:31
06:35 — 07:46 UA1349 United Airlines
Washington D.C. — Chicago
59m stop
08:45 — 11:31 UA1620 United Airlines
Chicago — Seattle
7h 56m
including layover
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from$153
07:00 — 00:34
+1 day
07:00 — 09:02 F9685 Frontier Airlines
Washington D.C. — Denver
13h 27m stop
22:29 — 00:37 F93405 Frontier Airlines
Denver — Seattle
20h 34m
including layover
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from$93
07:00 — 20:44
07:00 — 09:02 F9685 Frontier Airlines
Washington D.C. — Denver
9h 24m stop
21:36 — 23:44 F94545 Frontier Airlines
Denver — Seattle
16h 44m
including layover
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from$99
08:59 — 15:04
08:59 — 11:27 HA7211 Hawaiian Airlines
Washington D.C. — San Diego
33m stop
12:00 — 15:04 HA4781 Hawaiian Airlines
San Diego — Seattle
9h 5m
including layover
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from$105
08:59 — 17:34
08:59 — 11:27 HA7211 Hawaiian Airlines
Washington D.C. — San Diego
3h 3m stop
14:30 — 17:34 HA6536 Hawaiian Airlines
San Diego — Seattle
11h 35m
including layover
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from$105
10:25 — 15:52
10:25 — 12:09 UA1817 United Airlines
Washington D.C. — Denver
1h 47m stop
13:56 — 15:52 UA594 United Airlines
Denver — Seattle
8h 27m
including layover
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from$151
11:03 — 17:26
11:03 — 13:17 UA1928 United Airlines
Washington D.C. — Houston
1h 23m stop
14:40 — 17:26 UA686 United Airlines
Houston — Seattle
9h 23m
including layover
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from$151
12:35 — 18:49
12:35 — 15:23 UA1434 United Airlines
Washington D.C. — San Francisco
1h 12m stop
16:35 — 18:49 UA1636 United Airlines
San Francisco — Seattle
9h 14m
including layover
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from$153
12:50 — 19:18
12:50 — 15:08 UA1535 United Airlines
Washington D.C. — Houston
1h 22m stop
16:30 — 19:18 UA2084 United Airlines
Houston — Seattle
9h 28m
including layover
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from$153
13:00 — 00:34
+1 day
13:00 — 14:57 F9687 Frontier Airlines
Washington D.C. — Denver
7h 19m stop
22:29 — 00:37 F93405 Frontier Airlines
Denver — Seattle
14h 34m
including layover
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from$93
13:00 — 20:44
13:00 — 15:10 F9687 Frontier Airlines
Washington D.C. — Denver
3h 25m stop
21:36 — 23:44 F94545 Frontier Airlines
Denver — Seattle
10h 44m
including layover
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from$99
14:00 — 18:49
14:00 — 15:13 UA1801 United Airlines
Washington D.C. — Chicago
57m stop
16:10 — 18:49 UA2278 United Airlines
Chicago — Seattle
7h 49m
including layover
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from$153
14:59 — 21:16
14:59 — 17:21 UA1381 United Airlines
Washington D.C. — Houston
1h 9m stop
18:30 — 21:16 UA1544 United Airlines
Houston — Seattle
9h 17m
including layover
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from$153
15:00 — 20:54
15:00 — 17:47 UA2862 United Airlines
Washington D.C. — San Francisco
51m stop
18:41 — 20:57 UA2019 United Airlines
San Francisco — Seattle
8h 54m
including layover
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from$155
15:48 — 21:17
15:48 — 17:40 UA2692 United Airlines
Washington D.C. — Denver
1h 40m stop
19:20 — 21:17 UA299 United Airlines
Denver — Seattle
8h 29m
including layover
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from$151
16:00 — 21:22
16:00 — 17:52 UA2852 United Airlines
Washington D.C. — Denver
1h 33m stop
19:25 — 21:22 UA1729 United Airlines
Denver — Seattle
8h 22m
including layover
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from$153
16:47 — 22:52
16:47 — 19:09 UA2456 United Airlines
Washington D.C. — Houston
56m stop
20:05 — 22:52 UA2456 United Airlines
Houston — Seattle
9h 5m
including layover
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from$151
18:00 — 00:34
+1 day
18:00 — 20:08 F9689 Frontier Airlines
Washington D.C. — Denver
2h 25m stop
17:17 — 19:27 F93405 Frontier Airlines
Denver — Seattle
9h 34m
including layover
Find flight
from$89
18:00 — 23:02
18:00 — 20:04 F9689 Frontier Airlines
Washington D.C. — Denver
56m stop
21:36 — 23:44 F94545 Frontier Airlines
Denver — Seattle
8h 2m
including layover
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from$98
19:00 — 23:59
19:00 — 20:16 UA1193 United Airlines
Washington D.C. — Chicago
1h stop
21:16 — 23:59 UA2200 United Airlines
Chicago — Seattle
7h 59m
including layover
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from$155
10:13 — 16:25
+1 day
10:13 — 12:32 G4252 Allegiant Air
Washington D.C. — Austin
4h 2m stop
16:34 — 17:43 NK1656 Spirit Airlines
Austin — Las Vegas
19h 57m stop
13:40 — 16:25 NK1681 Spirit Airlines
Las Vegas — Seattle
33h 12m
including layover
Find flight
from$144
*Departure and arrival times - local. Updated on July 3, 2025

Flight Information

Below we will explain in detail what the flights cost on the destination from Washington D.C. to Seattle depends on and how to choose the most interesting flight option for you.

Distance between Washington D.C. and Seattle is 3735 miles. Time difference between the cities is 3h. Airplanes depart 06:00 to 23:15 from 2 Washington D.C. airports and arrive 06:00 to 23:15 to 3 Seattle airports. Average flight time is 5h 47m.

  • The fastest flight 5h 38m
  • Average flight time 5h 47m
  • The earliest flight 06:00
  • The latest flight 23:15
  • Distance 2321 ml

The cheapest months to travel to Seattle are june (from 106 $), july (from 119 $), august (from 124 $).

The most expensive months are december (from 289 $), january (from 223 $), february (from 186 $).

What is the lowest airfare Washington D.C. to Seattle?

The cheapest plane ticket found by our users is $89. This airfare is for economy class on one-way F9689 flight by Frontier Airlines for July 14, 2025 which leaves Ronald Reagan in Washington D.C. at 18:00 am and arrives at Seattle Seattle-Tacoma Intl at 00:34.

Economy class
$89
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Business class
?
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First class
?
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Popular Airlines on the Route

The flight Washington D.C. — Seattle is served by 7 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 28 departures per week at the price of from $ 104 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 3545.

Direct flights

There are 18 nonstop flights on the route. The fastest direct flight is HA4967 by Hawaiian Airlines takes 5h 38m and the cheapest is F9689 by Frontier Airlines for $102.

  • AS - Alaska Airlines
    from $104
    Find
  • HA - Hawaiian Airlines
    from $102
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  • UA - United Airlines
    from $140
    Find
See more direct flights

Connecting Flights

There are 135 flights with layovers on the route. The fastest connecting flight is UA654 by United Airlines takes 7h 39m and the cheapest is F9689 by Frontier Airlines for $89.

  • AS - Alaska Airlines
    from $112
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  • F9 - Frontier Airlines
    from $89
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  • FI - Icelandair
    from $680
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  • SY - Sun Country Airlines
    from $156
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  • HA - Hawaiian Airlines
    from $105
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  • UA - United Airlines
    from $151
    Find
  • G4 - Allegiant Air
    from $144
    Find
See more connecting flights

Airports

You can fly from Washington D.C. to Seattle from 2 airports (Dulles International, Ronald Reagan).

Washington D.C. airports

  • Dulles International-IAD
    from $102
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  • Ronald Reagan-DCA
    from $89
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Seattle airports

  • Boeing Field International Airport-BFI
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  • Seattle-Tacoma Intl-SEA
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  • Kenmore Air Harbor SPB-LKE
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How to book a plane ticket yourself?

How to book an air ticket yourself?
  • Fill in the search parameters — cities of departure and destination, departure and return dates and click «Find flights»
  • Select the best flight that you like. Please, check the airports of departure and arrival. Select the best fare, but pay attention to the following flight details - airports of departure and arrival, flight duration and layovers. Please use filters and sort to find the best flight.
  • Click «Buy» when you are ready — our system will redirect you to the site that sells the selected flight ticket.
  • Fill in all passenger and payment information — passport and contact information, please double check all passengers’ names and make a payment for your itinerary.
  • That's it — you will receive an email with your e-ticket usually within 10 minutes after your flight is confirmed. Please, print the e-ticket and have it with you at the airport. You would need to have only a passport and/or a required form of ID to travel. Please, check your Visa requirements if you travel outside of the United States or Canada.

    To find a plane ticket, please select dates.

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