Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5

Get travel help 24/7 with our Customer First Guarantee

Wander Wisely™ with Price Match Guarantee and no change fees

Search over 400 airlines and more than 700,000 hotels worldwide

Amazing IAD to SEA Flight Deals

The cheapest flights to Seattle - Tacoma Intl. found within the past 7 days were $237. Prices and availability subject to change. Additional terms may apply.

IAD to SEA Frequently Asked Questions

  • Question : How to get cheap flights from IAD to SEA?
    Answer : Finding cheap flights in December depends on when you book. Generally the cheapest flights are on Tuesday - Thursday. Weekends, Friday- Sunday tend to be more expensive. If your dates are flexible heading out during the week can save you money. Here are some cheap flights from IAD to SEA we found in February 2019:
    • United has a flight on 04/16 Leaving 9:35 pm and returning on 04/20 at 4:21 am for only $386.00 per person
    • Alaska Airlines has a flight on 04/16 Leaving 9:25 pm and returning on 04/20 at 3:50 am for only $425.00 per person
    • Delta has a flight on 04/16 Leaving 11:40 am and returning on 04/20 at 10:34 am for only $472.00 per person
    • American Airlines has a flight on 04/12 Leaving 9:13 am and returning on 04/15 at 9:06 pm for only $477.00 per person
  • Question : What airlines fly from IAD to SEA?
    Answer : There are several airlines that fly from Washington D.C. (IAD) to Seattle (SEA) every month. The top airlines that fly IAD to SEA are:
    • United Airlines - (UA) with 552 flights every month
    • Delta Air Lines - (DL) with 432 flights every month
    • American Airlines - (AA) with 144 flights every month
    • Southwest Airlines - (WN) with 88 flights every month
    • Jet Airways - (9W) with 48 flights every month
  • Question : How long is the flight from IAD-SEA?
    Answer : The flight from IAD to SEA is 5 hours 43 minutes non-stop, during that time you will fly about 2,313 miles.

  • Question : How many flights are flown between IAD and SEA?
    Answer : There are 6 airline companies that fly from IAD to SEA, with approximately 1276 flights per month. That averages about 319 flights per week.

  • Question : How many miles from Washington D.C. to Seattle?
    Answer : The distance between IAD and SEA airports is about 2,313 miles.

  • Question : What is the earliest and latest flight of the day from IAD to SEA?
    Answer : The earliest flight leaves IAD at 07:36 am and arrives at SEA at 10:44 am. The last flight of the day departs IAD at 5:35 pm and arrives at SEA at 8:30 pm.

Flight Schedule for IAD to SEA

Carrier Flight Depart IAD Arrive SEA Sat
7/20
Sun
7/21
Mon
7/22
Tue
7/23
Wed
7/24
Thu
7/25
Fri
7/26
Stops
AS 1032 08:00 am 10:50 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 1964 08:45 am 11:34 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 2388 12:40 pm 03:13 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
DL 2220 05:00 pm 07:35 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 326 05:35 pm 08:30 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
AS 1085 06:50 pm 09:40 pm Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 2305 07:45 pm 12:14 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 1 stop(s)
UA 2296 10:00 pm 12:57 am Check fare Check fare Check fare Check fare Check fare Check fare Check fare 0 stop(s)
UA 424 08:20 am 04:21 pm - Check fare Check fare Check fare Check fare Check fare Check fare 1 stop(s)

Washington Dulles Intl. to Seattle - Tacoma Intl. Flight FAQ

Number Of Flight Options 2
Average Flight Time 3 hours 33 minutes

Save on your next flight from IAD to SEA when you book through Travelocity. Need a last-minute flight to Seattle? Travelocity offers discount airfare no matter when you book, even on popular routes such as Washington Dulles Intl. Airport to Seattle - Tacoma Intl. Airport. Whether you need a direct or indirect flight, you can trust Travelocity to provide you with the best prices for IAD to SEA flights.






Washington to Seattle Carriers and Route Information

Flight path for flights from Washington Dulles International Airport to Seattle-Tacoma International Airport.


Distance:
2,313.00 miles

Airline carriers and aircraft used on flights from IAD to SEA


Airline Carrier
Aircraft
Alaska Airlines
Canadair Regional Jet 700
Alaska Airlines
Embraer RJ140
Alaska Airlines
Embraer RJ145 Amazon
American Airlines
Boeing 737 all pax models
United Airlines
Airbus A321-100/200


Hotels near Seattle - Tacoma Intl. Airport (SEA)

Red Roof Inn Seattle Airport - SEATAC $126
Reviewed on Jun 29, 2019
See details
 
Red Roof Inn Seattle Airport - SEATAC

Red Roof Inn Seattle Airport - SEATAC

16838 International Boulevard, SeaTac, WA
     
    3.3 of 5
    2.0 out of 5.0 Stars

    Close to airport with free shuttle. Check in crew were a bit grouchy upon arrival.... but the place is handy & decent price.

    Red Lion Hotel Seattle Airport Sea-Tac $127
    Reviewed on Jun 6, 2019
    See details
     
    Red Lion Hotel Seattle Airport Sea-Tac

    Red Lion Hotel Seattle Airport Sea-Tac

    18220 International Blvd, SeaTac, WA
       
      4.0 of 5
      3.0 out of 5.0 Stars

      Located close to the airport, public transportation, and great staff! Very reasonable price with great restaurant located next door.

      Coast Gateway Hotel $152
      Reviewed on Jul 6, 2019
      See details
       
      Coast Gateway Hotel

      Coast Gateway Hotel

      18415 International Blvd, SeaTac, WA
         
        4.3 of 5
        3.5 out of 5.0 Stars

        It was great having a place to eat so close to the hotel. Coming from AZ I especially enjoyed their fish dinners! The room was extremely clean, the staff friendly, and my total surprise was how quiet it was being so close to the airport!! I would recommend this hostel to anyone wanting to stay near ...

        Ramada by Wyndham SeaTac Airport $109
        Reviewed on Jun 4, 2019
        See details
         
        Ramada by Wyndham SeaTac Airport

        Ramada by Wyndham SeaTac Airport

        16720 International Blvd, SeaTac, WA
           
          3.2 of 5
          2.5 out of 5.0 Stars

          The elevators need fixed feels like your stuck in them doors don't open right

          *Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.