Cheap Flights from Washington D.C., DC to Seattle, WA from $78

On Cheapflightsplus.com you will find 21 direct and 144 connecting flights from Washington D.C. to Seattle. You can compare airfare deals from 8 airlines and multiple travel sites from $78, 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: $78 (one-way), $134 (round-trip).
Direct flights
  • Check to choose departure date Check to choose departure date
Check prices for return flight
Find flights
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 HA4967 Hawaiian Airlines
Washington D.C. — Seattle
5h 40m
Find flight
from$147
06:30 — 09:10
06:30 — 09:10 AS308 Alaska Airlines
Washington D.C. — Seattle
5h 40m
Find flight
from$149
08:00 — 10:39
08:00 — 10:39 HA6701 Hawaiian Airlines
Washington D.C. — Seattle
5h 39m
Find flight
from$218
08:00 — 10:39
08:00 — 10:39 AS1 Alaska Airlines
Washington D.C. — Seattle
5h 39m
Find flight
from$220
08:45 — 11:35
08:45 — 11:35 UA2665 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$153
08:45 — 11:35
08:45 — 11:35 UA1366 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$225
09:00 — 11:43
09:00 — 11:43 AS375 Alaska Airlines
Washington D.C. — Seattle
5h 43m
Find flight
from$118
09:00 — 11:50
09:00 — 11:50 UA1734 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$153
09:00 — 11:39
09:00 — 11:39 HA4968 Hawaiian Airlines
Washington D.C. — Seattle
5h 39m
Find flight
from$186
09:00 — 11:39
09:00 — 11:39 AS396 Alaska Airlines
Washington D.C. — Seattle
5h 39m
Find flight
from$189
13:05 — 15:53
13:05 — 15:53 UA1395 United Airlines
Washington D.C. — Seattle
5h 48m
Find flight
from$153
17:00 — 19:56
17:00 — 19:56 HA6703 Hawaiian Airlines
Washington D.C. — Seattle
5h 56m
Find flight
from$178
17:00 — 19:56
17:00 — 19:56 AS3 Alaska Airlines
Washington D.C. — Seattle
5h 56m
Find flight
from$180
17:55 — 20:48
17:55 — 20:48 UA326 United Airlines
Washington D.C. — Seattle
5h 53m
Find flight
from$153
18:13 — 21:00
18:13 — 21:00 HA4969 Hawaiian Airlines
Washington D.C. — Seattle
5h 47m
Find flight
from$108
18:13 — 21:00
18:13 — 21:00 AS406 Alaska Airlines
Washington D.C. — Seattle
5h 47m
Find flight
from$118
18:15 — 21:00
18:15 — 21:00 HA4836 Hawaiian Airlines
Washington D.C. — Seattle
5h 45m
Find flight
from$186
18:15 — 21:00
18:15 — 21:00 AS351 Alaska Airlines
Washington D.C. — Seattle
5h 45m
Find flight
from$189
22:06 — 00:56
+1 day
22:06 — 00:56 UA716 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$153
22:09 — 00:59
+1 day
22:09 — 00:59 UA2713 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$153
22:09 — 00:59
+1 day
22:09 — 00:59 UA2136 United Airlines
Washington D.C. — Seattle
5h 50m
Find flight
from$225
07:00 — 00:34
+1 day
07:00 — 09:02 F9685 Frontier Airlines
Washington D.C. — Denver
13h 33m stop
22:29 — 00:37 F93405 Frontier Airlines
Denver — Seattle
20h 34m
including layover
Find flight
from$82
07:40 — 14:11
07:25 — 09:40 F94277 Frontier Airlines
Washington D.C. — Las Vegas
1h 34m stop
11:19 — 14:16 F92407 Frontier Airlines
Las Vegas — Seattle
9h 31m
including layover
Find flight
from$78
08:59 — 15:10
08:59 — 11:20 HA7211 Hawaiian Airlines
Washington D.C. — San Diego
52m stop
12:12 — 15:10 HA6535 Hawaiian Airlines
San Diego — Seattle
9h 11m
including layover
Find flight
from$152
08:59 — 16:45
08:59 — 11:20 HA7211 Hawaiian Airlines
Washington D.C. — San Diego
2h 25m stop
13:45 — 16:45 HA6532 Hawaiian Airlines
San Diego — Seattle
10h 46m
including layover
Find flight
from$152
12:46 — 20:56
12:46 — 14:24 SY224 Sun Country Airlines
Washington D.C. — Minneapolis
4h 42m stop
19:06 — 20:56 SY1639 Sun Country Airlines
Minneapolis — Seattle
11h 10m
including layover
Find flight
from$137
12:59 — 19:14
12:59 — 15:14 UA1292 United Airlines
Washington D.C. — Houston
1h 11m stop
16:25 — 19:14 UA774 United Airlines
Houston — Seattle
9h 15m
including layover
Find flight
from$151
13:00 — 00:34
+1 day
13:00 — 14:57 F9687 Frontier Airlines
Washington D.C. — Denver
7h 30m stop
22:29 — 00:37 F93405 Frontier Airlines
Denver — Seattle
14h 34m
including layover
Find flight
from$91
13:00 — 23:42
13:00 — 15:10 F9687 Frontier Airlines
Washington D.C. — Denver
6h 37m stop
21:36 — 23:44 F94545 Frontier Airlines
Denver — Seattle
13h 42m
including layover
Find flight
from$100
15:46 — 08:02
+1 day
12:40 — 14:18 SY224 Sun Country Airlines
Washington D.C. — Minneapolis
12h 48m stop
06:12 — 08:02 SY281 Sun Country Airlines
Minneapolis — Seattle
19h 16m
including layover
Find flight
from$132
15:46 — 22:50
12:49 — 14:36 SY224 Sun Country Airlines
Washington D.C. — Minneapolis
3h 36m stop
21:00 — 22:45 SY289 Sun Country Airlines
Minneapolis — Seattle
10h 4m
including layover
Find flight
from$159
17:25 — 23:44
17:25 — 19:52 HA4966 Hawaiian Airlines
Washington D.C. — San Diego
53m stop
20:45 — 23:44 HA6533 Hawaiian Airlines
San Diego — Seattle
9h 19m
including layover
Find flight
from$111
17:25 — 23:44
17:25 — 19:52 AS507 Alaska Airlines
Washington D.C. — San Diego
53m stop
20:45 — 23:44 AS1110 Alaska Airlines
San Diego — Seattle
9h 19m
including layover
Find flight
from$118
18:00 — 00:34
+1 day
18:00 — 20:08 F9689 Frontier Airlines
Washington D.C. — Denver
2h 24m stop
17:17 — 19:27 F93405 Frontier Airlines
Denver — Seattle
9h 34m
including layover
Find flight
from$78
18:00 — 23:42
18:00 — 20:04 F9689 Frontier Airlines
Washington D.C. — Denver
1h 31m stop
21:36 — 23:44 F94545 Frontier Airlines
Denver — Seattle
8h 42m
including layover
Find flight
from$96
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
Find flight
from$151
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$141
*Departure and arrival times - local. Updated on May 20, 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 39m
  • 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 104 $), july (from 117 $), may (from 123 $).

The most expensive months are december (from 283 $), january (from 218 $), february (from 182 $).

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

The cheapest plane ticket found by our users is $78. This airfare is for economy class on one-way F9689 flight by Frontier Airlines for June 6, 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
$78
Find
Business class
?
Find
First class
?
Find

Popular Airlines on the Route

The flight Washington D.C. — Seattle is served by 8 regular airlines and 3 low-cost airlines. Most of the flights on this route are operated by Alaska Airlines - 21 departures per week at the price of from $ 118 . And the most expensive tickets are offered by Alaska Airlines airline - from $ 4046.

Direct flights

There are 21 nonstop flights on the route. The fastest direct flight is HA4968 by Hawaiian Airlines takes 5h 39m and the cheapest is F9689 by Frontier Airlines for $108.

  • AS - Alaska Airlines
    from $118
    Find
  • HA - Hawaiian Airlines
    from $108
    Find
  • UA - United Airlines
    from $153
    Find
See more direct flights

Connecting Flights

There are 144 flights with layovers on the route. The fastest connecting flight is SY224 by Sun Country Airlines takes 7h 22m and the cheapest is F9689 by Frontier Airlines for $78.

  • AS - Alaska Airlines
    from $118
    Find
  • F9 - Frontier Airlines
    from $78
    Find
  • FI - Icelandair
    from $741
    Find
  • SY - Sun Country Airlines
    from $132
    Find
  • TK - Turkish Airlines
    from $1964
    Find
  • HA - Hawaiian Airlines
    from $111
    Find
  • UA - United Airlines
    from $151
    Find
  • G4 - Allegiant Air
    from $141
    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 $78
    Find
  • Ronald Reagan-DCA
    from $78
    Find

Seattle airports

  • Boeing Field International Airport-BFI
    Find
  • Seattle-Tacoma Intl-SEA
    Find
  • Kenmore Air Harbor SPB-LKE
    Find

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.

Back