Flight INFO & Delta Air Lines(DL) flights from Seattle to Washington D.C.

Cheapest one-way flight price US$112
Cheapest return ticket price US$221
Cheapest month October
Peak season for travel July
Flight distance 3,736.07 km
Average flight time 5 hours 1 minute
Popular airline Delta Air Lines
Frequency ～35/week

Book Delta Air Lines(DL) flights from Seattle to Washington D.C.

  • One way
  • Round-trip
      • direct cheapest
        SEA15:55
        5h
        Nonstop
        IAD23:55
        Seattle - Washington D.C.|Tue, Sep 22|Delta Air Lines
        US$131
        US$276
        53% off
        Search
        53% off
        US$276
        US$131
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Fri, Oct 2|Delta Air Lines
        US$140
        US$276
        49% off
        Search
        49% off
        US$276
        US$140
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Thu, Oct 1|Delta Air Lines
        US$140
        US$276
        49% off
        Search
        49% off
        US$276
        US$140
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Fri, Oct 2|Delta Air Lines
        US$151
        Search
        US$151
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Thu, Oct 1|Delta Air Lines
        US$151
        Search
        US$151
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Sun, Oct 4|Delta Air Lines
        US$151
        Search
        US$151
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Fri, Sep 25|Delta Air Lines
        US$152
        Search
        US$152
      • SEA14:50
        4h 59m
        Nonstop
        IAD22:49
        Seattle - Washington D.C.|Tue, Oct 6|Delta Air Lines
        US$152
        Search
        US$152
      • SEA07:20
        5h 3m
        Nonstop
        DCA15:23
        Seattle - Washington D.C.|Tue, Oct 6|Delta Air Lines
        US$152
        Search
        US$152
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Sat, Sep 12|Delta Air Lines
        US$171
        Search
        US$171
      • SEA07:23
        5h 17m
        Nonstop
        DCA15:40
        Seattle - Washington D.C.|Mon, Sep 21|Delta Air Lines
        US$175
        Search
        US$175
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Fri, Sep 25|Delta Air Lines
        US$178
        Search
        US$178
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Tue, Sep 8|Delta Air Lines
        US$188
        Search
        US$188
      • SEA07:20
        5h 12m
        Nonstop
        DCA15:32
        Seattle - Washington D.C.|Thu, Sep 17|Delta Air Lines
        US$196
        Search
        US$196
      • SEA15:55
        5h
        Nonstop
        IAD23:55
        Seattle - Washington D.C.|Mon, Sep 21|Delta Air Lines
        US$197
        Search
        US$197
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Sun, Sep 27|Delta Air Lines
        US$199
        Search
        US$199
      • SEA11:45
        5h 16m
        Nonstop
        IAD20:01
        Seattle - Washington D.C.|Sat, Oct 3|Delta Air Lines
        US$202
        Search
        US$202
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Wed, Sep 23|Delta Air Lines
        US$204
        Search
        US$204
      • SEA14:40
        4h 59m
        Nonstop
        IAD22:39
        Seattle - Washington D.C.|Thu, Oct 8|Delta Air Lines
        US$206
        Search
        US$206
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Thu, Sep 17|Delta Air Lines
        US$209
        Search
        US$209
      • SEA07:23
        5h 17m
        Nonstop
        DCA15:40
        Seattle - Washington D.C.|Tue, Sep 22|Delta Air Lines
        US$213
        Search
        US$213
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Thu, Sep 24|Delta Air Lines
        US$213
        Search
        US$213
      • SEA15:55
        5h
        Nonstop
        IAD23:55
        Seattle - Washington D.C.|Sat, Sep 19|Delta Air Lines
        US$213
        Search
        US$213
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Thu, Sep 10|Delta Air Lines
        US$214
        Search
        US$214
      • SEA14:52
        5h 4m
        Nonstop
        IAD22:56
        Seattle - Washington D.C.|Tue, Sep 29|Delta Air Lines
        US$217
        Search
        US$217
      • SEA07:23
        5h 17m
        Nonstop
        DCA15:40
        Seattle - Washington D.C.|Sat, Sep 19|Delta Air Lines
        US$218
        Search
        US$218
      • SEA22:59
        9h 51m
        1 stops
        IAD11:50
        Seattle - Washington D.C.|Tue, Oct 6|Delta Air Lines
        US$154
        Search
        US$154
      • SEA23:50
        8h 10m
        1 stops
        DCA11:00
        Seattle - Washington D.C.|Tue, Oct 6|Delta Air Lines
        US$154
        Search
        US$154
      • SEA11:35
        9h 9m
        1 stops
        DCA23:44
        Seattle - Washington D.C.|Fri, Oct 2|Delta Air Lines
        US$156
        Search
        US$156
      • SEA08:55
        10h 4m
        1 stops
        DCA21:59
        Seattle - Washington D.C.|Wed, Sep 9|Delta Air Lines
        US$205
        Search
        US$205
      • SEA13:00
        10h 4m
        Nonstop
        WAS14:00
        Seattle - Washington D.C.|Mon, Sep 6|Normal Airline
        More cheap flights
        More cheap flights

Delta Air Lines(DL) flights from Seattle to Washington D.C. & Flight Schedule

Flight info.
Departure
Arrival
Weekly Schedule

  1. DL541

    Delta Air Lines

    15:55

    SEA

    4.9h

    Nonstop

    23:51

    IAD

    S M T W T F S
    Search

  2. DL786

    Delta Air Lines

    07:23

    SEA

    5.2h

    Nonstop

    15:34

    DCA

    S M T W T F S
    Search

  3. DL452

    Delta Air Lines

    21:55

    SEA

    5.5h

    Nonstop

    06:22

    JFK

    S M T W T F S
    Search

  4. DL5699

    Delta Air Lines

    16:30

    JFK

    1.6h

    Nonstop

    18:05

    DCA

    S M T W T F S
    Search

  5. DL953

    Delta Air Lines

    23:53

    SEA

    3.4h

    Nonstop

    05:15

    MSP

    S M T W T F S
    Search

  6. DL2958

    Delta Air Lines

    07:00

    MSP

    2.6h

    Nonstop

    10:37

    DCA

    S M T W T F S
    Search

  7. DL652

    Delta Air Lines

    23:35

    SEA

    4.8h

    Nonstop

    07:25

    ATL

    S M T W T F S
    Search

  8. DL1444

    Delta Air Lines

    10:12

    ATL

    1.8h

    Nonstop

    11:59

    IAD

    S M T W T - S
    Search

Delta Air Lines(DL) flights from Seattle to Washington D.C. Flight Booking FAQ

  • Which airlines offer direct flights from Seattle to Washington D.C.?

    At the moment, you can catch a nonstop flight from Seattle to Washington D.C. with the following airlines, including: Alaska Airlines Delta Air Lines American Airlines United Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

  • How long is a flight from Seattle to Washington D.C.?

    It takes about 5 hours 1 minute to fly from Seattle to Washington D.C..

  • When is the best time to book flights from Seattle to Washington D.C.?

    By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to Washington D.C. is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

  • How many flights are there per week from Seattle to Washington D.C.?

    Based on Trip.com data in the past 4 weeks, there is 57 flight per week flying from Seattle to Washington D.C.. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA1523 (08:22)

  • When are flight tickets from Seattle (SEA) to Washington D.C. (WAS) the cheapest?

    The cheapest months to fly from Seattle to Washington D.C. is October, when demand for travel is lower.

  • Which upcoming date is cheapest to fly from Seattle to Washington D.C. on?

    After crunching the numbers on our September flight calendar, it's currently cheapest to fly from Seattle to Washington D.C. on September 18, 2026 with Frontier Airlines, with prices starting at US$110.

  • Which airports fly into Washington D.C. from Seattle?

    You can land at any one of the following hubs in Washington D.C.: Ronald Reagan Washington National Airport (DCA), and Dulles International Airport (IAD). Flying from Seattle-Tacoma International Airport to Dulles International Airport (SEA-IAD) is by far the most common option on this route.

  • Is there any time difference between Seattle and Washington D.C.?

    The time difference between Washington D.C. and Seattle is 3h.

  • How do I change or cancel my ticket from Seattle to Washington D.C.?

    Tickets can only be changed or canceled if permitted by airline policy. 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. However, 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.