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Seattle-Tacoma International Airport to Dulles International Airport flight

Search for flights from Seattle to Washington D.C. and check out affordable one-way and round-trip options.

      • Cheapest nonstop
        SEA 16:05
        5h 3m
        Direct
        IAD 00:08
        Seattle - Washington D.C. | Fri, Jul 17 | Delta Air Lines
        IAD 07:00
        5h 45m
        Direct
        SEA 09:45
        Washington D.C. - Seattle | Fri, Jul 24 | Delta Air Lines
        DKK 1,639 DKK 1,909
        14% off
        14% off
        DKK 1,909 DKK 1,639
      • SEA 15:58
        5h 1m
        Direct
        IAD 23:59
        Seattle - Washington D.C. | Fri, Aug 14 | Delta Air Lines
        IAD 07:10
        5h 45m
        Direct
        SEA 09:55
        Washington D.C. - Seattle | Thu, Aug 20 | Delta Air Lines
        DKK 1,649 DKK 1,909
        14% off
        14% off
        DKK 1,909 DKK 1,649
      • SEA 16:05
        5h 3m
        Direct
        IAD 00:08
        Seattle - Washington D.C. | Tue, Aug 4 | Delta Air Lines
        IAD 07:10
        5h 45m
        Direct
        SEA 09:55
        Washington D.C. - Seattle | Tue, Aug 11 | Delta Air Lines
        DKK 1,654 DKK 1,909
        13% off
        13% off
        DKK 1,909 DKK 1,654
      • SEA 22:43
        4h 56m
        Direct
        IAD 06:39
        Seattle - Washington D.C. | Sat, Jul 18 | Alaska Airlines
        IAD 06:03
        5h 45m
        Direct
        SEA 08:48
        Washington D.C. - Seattle | Wed, Jul 22 | Alaska Airlines
        DKK 1,667
        13% off
        DKK 1,909 DKK 1,667
      • SEA 16:01
        4h 58m
        Direct
        IAD 23:59
        Seattle - Washington D.C. | Fri, Aug 7 | Alaska Airlines
        IAD 06:03
        5h 45m
        Direct
        SEA 08:48
        Washington D.C. - Seattle | Thu, Aug 13 | Alaska Airlines
        DKK 1,699
        11% off
        DKK 1,909 DKK 1,699
      • SEA 16:05
        5h 3m
        Direct
        IAD 00:08
        Seattle - Washington D.C. | Sat, Aug 8 | Delta Air Lines
        IAD 07:10
        5h 45m
        Direct
        SEA 09:55
        Washington D.C. - Seattle | Fri, Aug 14 | Delta Air Lines
        DKK 1,794
        6% off
        DKK 1,909 DKK 1,794
      • SEA 20:12
        9h 13m
        1 stop
        IAD 08:25
        Seattle - Washington D.C. | Thu, Jul 2 | Frontier Airlines
        IAD 09:55
        27h 40m
        1 stop
        SEA 10:35
        Washington D.C. - Seattle | Fri, Jul 10 | Frontier Airlines
        DKK 1,695
        11% off
        DKK 1,909 DKK 1,695
      • SEA 06:21
        9h 24m
        1 stop
        IAD 18:45
        Seattle - Washington D.C. | Fri, Aug 21 | Alaska Airlines
        IAD 06:03
        5h 45m
        Direct
        SEA 08:48
        Washington D.C. - Seattle | Mon, Aug 24 | Alaska Airlines
        DKK 1,709
        10% off
        DKK 1,909 DKK 1,709
      • SEA 20:53
        8h 27m
        1 stop
        IAD 08:20
        Seattle - Washington D.C. | Fri, Aug 21 | Frontier Airlines
        DCA 16:35
        10h
        1 stop
        SEA 23:35
        Washington D.C. - Seattle | Thu, Aug 27 |
        DKK 1,730
        9% off
        DKK 1,909 DKK 1,730
      • SEA 07:40
        7h 47m
        1 stop
        IAD 18:27
        Seattle - Washington D.C. | Thu, Aug 20 | American Airlines
        DCA 18:00
        18h 19m
        1 stop
        SEA 09:19
        Washington D.C. - Seattle | Wed, Aug 26 | Frontier Airlines
        DKK 1,754
        8% off
        DKK 1,909 DKK 1,754
      • SEA 13:00
        17h 25m
        1 stop
        WAS 14:00
        Seattle - Washington D.C. | Tue, Jun 30 | Normal Airline
        WAS 15:00
        6h
        Direct
        SEA 16:00
        Washington D.C. - Seattle | Thu, Jul 2 | Normal Airline
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      • Cheapest nonstop
        SEA 16:05
        5h 3m
        Direct
        IAD 00:08
        Seattle - Washington D.C. | Fri, Jul 10 | Delta Air Lines
        DKK 968 DKK 1,171
        17% off
        17% off
        DKK 1,171 DKK 968
      • SEA 16:05
        5h 3m
        Direct
        IAD 00:08
        Seattle - Washington D.C. | Wed, Jul 15 | Delta Air Lines
        DKK 972 DKK 1,171
        17% off
        17% off
        DKK 1,171 DKK 972
      • SEA 23:20
        5h 2m
        Direct
        IAD 07:22
        Seattle - Washington D.C. | Thu, Aug 6 | United Airlines
        DKK 1,100 DKK 1,171
        6% off
        6% off
        DKK 1,171 DKK 1,100
      • SEA 22:40
        7h 44m
        1 stop
        IAD 09:24
        Seattle - Washington D.C. | Tue, Jul 21 | United Airlines
        DKK 936
        20% off
        DKK 1,171 DKK 936
      • SEA 06:21
        9h 24m
        1 stop
        IAD 18:45
        Seattle - Washington D.C. | Tue, Aug 11 | Alaska Airlines
        DKK 990
        15% off
        DKK 1,171 DKK 990
      • SEA 18:15
        8h 10m
        1 stop
        IAD 05:25
        Seattle - Washington D.C. | Wed, Aug 12 | United Airlines
        DKK 1,033
        12% off
        DKK 1,171 DKK 1,033
      • SEA 06:21
        9h 24m
        1 stop
        IAD 18:45
        Seattle - Washington D.C. | Wed, Jul 29 | Alaska Airlines
        DKK 1,053
        10% off
        DKK 1,171 DKK 1,053
      • SEA 23:22
        8h 45m
        1 stop
        IAD 11:07
        Seattle - Washington D.C. | Fri, Jul 10 | American Airlines
        DKK 1,067
        9% off
        DKK 1,171 DKK 1,067
      • SEA 20:13
        9h 7m
        1 stop
        IAD 08:20
        Seattle - Washington D.C. | Tue, Jul 14 | Frontier Airlines
        DKK 1,070
        9% off
        DKK 1,171 DKK 1,070
      • SEA 20:13
        9h 7m
        1 stop
        IAD 08:20
        Seattle - Washington D.C. | Wed, Jul 29 | Frontier Airlines
        DKK 1,097
        6% off
        DKK 1,171 DKK 1,097
      • SEA 13:00
        17h 25m
        1 stop
        WAS 14:00
        Seattle - Washington D.C. | Tue, Jun 30 | Normal Airline
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Flight fares from Seattle-Tacoma International Airport to Dulles International Airport are based on average airline prices for the next 3 months, according to Trip.com’s latest data.

Trip.com Price Insights: Flights from Seattle-Tacoma International Airport to Dulles International Airport

What is the cheapest month to fly from Seattle-Tacoma International Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Seattle-Tacoma International Airport to Dulles International Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Seattle-Tacoma International Airport to Dulles International Airport are usually in June, with an average price of DKK 1,309. It is best to avoid January, when the average price can reach DKK 3,335.

DKK 3,335
DKK 2,322
DKK 1,309
DKK 296
  • DKK 1,309
    Jun
  • DKK 1,905
    Jul
  • DKK 1,705
    Aug
  • DKK 2,275
    Sep
  • DKK 2,214
    Oct
  • DKK 2,498
    Nov
  • DKK 1,916
    Dec
  • DKK 3,335
    Jan
  • DKK 2,227
    Feb
  • DKK 2,077
    Mar
  • DKK 1,734
    Apr
  • DKK 2,147
    May

What is the cheapest day of the week to fly from Seattle-Tacoma International Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average ticket prices from Seattle-Tacoma International Airport to Dulles International Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Seattle-Tacoma International Airport to Dulles International Airport is Wednesday, with average prices usually lower than other days. Avoid departing on Monday as prices are typically highest on that day.

DKK 2,373
DKK 1,737
DKK 1,100
DKK 464
    Cheapest
  • DKK 2,373
    Mon
  • DKK 1,936
    Tue
  • DKK 1,100
    Wed
  • DKK 2,279
    Thu
  • DKK 1,764
    Fri
  • DKK 2,371
    Sat
  • DKK 2,311
    Sun

Selected Airlines from Seattle-Tacoma International Airport to Dulles International Airport

See which airlines fly from Seattle to Washington D.C.. Find the airline that best meets your travel needs by comparing prices and treat yourself to an enjoyable journey.

Alaska Airlines
From DKK 902
Delta Air Lines
From DKK 908
United Airlines
From DKK 936
American Airlines
From DKK 1,067
Frontier Airlines
From DKK 1,070
Sun Country Airlines
From DKK 1,543

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Flight Schedule from Seattle-Tacoma International Airport to Dulles International Airport

Check the schedule for flights from Seattle to Washington D.C. and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL541

    Seattle-Tacoma International Airport

    14:40

    SEA

    4h 59m

    22:39

    IAD

    S M T W T F S
    Search

  2. UA264

    Seattle-Tacoma International Airport

    23:20

    SEA

    5h 2m

    07:22

    IAD

    S M T W T - S
    Search

  3. AS367

    Seattle-Tacoma International Airport

    21:35

    SEA

    5h 5m

    05:40

    IAD

    S M T W T - S
    Search

  4. UA1218

    Seattle-Tacoma International Airport

    19:10

    SEA

    2h 45m

    Direct

    22:55

    DEN

    S - T W T - S
    Search

  5. UA1924

    Denver International Airport

    23:50

    DEN

    3h 18m

    Direct

    05:08

    IAD

    S M T W T F S

  6. UA2379

    Seattle-Tacoma International Airport

    23:59

    SEA

    4h 16m

    Direct

    06:15

    IAH

    S - - W - F S
    Search

  7. UA1549

    George Bush Intercontinental Airport

    07:40

    IAH

    2h 57m

    Direct

    11:37

    IAD

    S M T W T F S

  8. AA2003

    Seattle-Tacoma International Airport

    23:24

    SEA

    3h 54m

    Direct

    05:18

    DFW

    S M T W - - S
    Search

  9. AA1906

    Dallas Fort Worth International Airport

    07:05

    DFW

    3h 3m

    Direct

    11:08

    IAD

    S M T W T - S

  10. F92408

    Seattle-Tacoma International Airport

    21:29

    SEA

    2h 42m

    Direct

    00:11

    LAS

    S M T W T F S
    Search

  11. F94278

    Harry Reid International Airport

    00:15

    LAS

    4h 35m

    Direct

    07:50

    IAD

    S M T W T F S

  12. AS1361

    Seattle-Tacoma International Airport

    06:21

    SEA

    2h 49m

    Direct

    09:10

    SAN

    S - - W T F S
    Search

  13. AS506

    San Diego International Airport

    10:46

    SAN

    5h 11m

    Direct

    18:57

    IAD

    S M T W T F S

  14. AA2748

    Seattle-Tacoma International Airport

    05:10

    SEA

    4h

    Direct

    11:10

    DFW

    S M T W T F -
    Search

  15. AA1904

    Dallas Fort Worth International Airport

    14:34

    DFW

    3h

    Direct

    18:34

    IAD

    S M T W - - S
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Seattle-Tacoma International Airport to Dulles International Airport Flights Info

Flight distance3,705.38km
Cheapest one-way ticket priceDKK 936
Cheapest return ticket priceDKK 1,639

FAQs for Seattle-Tacoma International Airport to Dulles International Airport Flights

  • How long does it take to fly from Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD)?

    It takes around 5 hours 2 minutes to fly from Seattle-Tacoma International Airport (sea) to Dulles International Airport(iad).
  • There are around 5 daily flights from Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD).
  • Tickets cost around DKK 1,422 in September, making it the cheapest month to book. Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD) is a popular route, so don't forget to book your tickets in advance.
  • The route from Seattle-Tacoma International Airport (SEA) to Dulles International Airport (IAD) is quite popular. Without considering departure times or holidays, tickets cost around DKK 2,500 in July, the most expensive month to book this route.
  • American Airlines is a very popular airline operating an average of 1589 flights per month.

Find Cheap Flights with Trip.com

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

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Prices displayed on this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within the last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.