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Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport flight

Explore the cheapest one-way and round-trip flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport over the next 90 days, with one-way fares from NZD 238 and round-trip from NZD 325. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        DCA 16:45
        5h 50m
        Direct
        SEA 19:35
        Washington D.C. - Seattle | Wed, Nov 4 | Delta Air Lines
        SEA 14:50
        4h 59m
        Direct
        IAD 22:49
        Seattle - Washington D.C. | Sat, Nov 7 | Delta Air Lines
        NZD 379 NZD 651
        42% off
        42% off
        NZD 651 NZD 379
      • DCA 16:45
        5h 40m
        Direct
        SEA 19:25
        Washington D.C. - Seattle | Sat, Oct 24 | Delta Air Lines
        SEA 07:20
        5h 3m
        Direct
        DCA 15:23
        Seattle - Washington D.C. | Thu, Oct 29 | Delta Air Lines
        NZD 425 NZD 651
        35% off
        35% off
        NZD 651 NZD 425
      • DCA 16:00
        9h 3m
        1 stop
        SEA 22:03
        Washington D.C. - Seattle | Tue, Nov 3 | Delta Air Lines
        SEA 07:20
        5h 3m
        Direct
        DCA 15:23
        Seattle - Washington D.C. | Sat, Nov 7 | Delta Air Lines
        NZD 325 NZD 651
        50% off
        50% off
        NZD 651 NZD 325
      • DCA 07:45
        10h 58m
        1 stop
        SEA 15:43
        Washington D.C. - Seattle | Wed, Nov 4 | American Airlines
        SEA 23:59
        8h
        1 stop
        DCA 10:59
        Seattle - Washington D.C. | Sat, Nov 7 | American Airlines
        NZD 353
        46% off
        NZD 651 NZD 353
      • DCA 14:45
        8h 29m
        1 stop
        SEA 20:14
        Washington D.C. - Seattle | Thu, Nov 19 | American Airlines
        SEA 10:47
        7h 5m
        1 stop
        DCA 20:52
        Seattle - Washington D.C. | Thu, Nov 26 | American Airlines
        NZD 388
        40% off
        NZD 651 NZD 388
      • DCA 18:00
        24h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Sun, Oct 11 | Frontier Airlines
        SEA 16:27
        16h 44m
        1 stop
        DCA 12:11
        Seattle - Washington D.C. | Sun, Oct 18 | Frontier Airlines
        NZD 390
        40% off
        NZD 651 NZD 390
      • DCA 18:00
        9h 27m
        1 stop
        SEA 00:27
        Washington D.C. - Seattle | Thu, Oct 22 | Frontier Airlines
        SEA 19:41
        23h 17m
        1 stop
        DCA 21:58
        Seattle - Washington D.C. | Tue, Oct 27 | Frontier Airlines
        NZD 465
        28% off
        NZD 651 NZD 465
      • DCA 07:00
        11h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Thu, Nov 19 | Frontier Airlines
        SEA 16:27
        16h 42m
        1 stop
        DCA 12:09
        Seattle - Washington D.C. | Thu, Nov 26 | Frontier Airlines
        NZD 469
        28% off
        NZD 651 NZD 469
      • DCA 13:00
        29h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Mon, Oct 19 | Frontier Airlines
        SEA 16:27
        26h 32m
        1 stop
        DCA 21:59
        Seattle - Washington D.C. | Sat, Oct 24 | Frontier Airlines
        NZD 471
        28% off
        NZD 651 NZD 471
      • DCA 18:00
        24h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Sun, Oct 18 | Frontier Airlines
        SEA 16:27
        26h 32m
        1 stop
        DCA 21:59
        Seattle - Washington D.C. | Sat, Oct 24 | Frontier Airlines
        NZD 471
        28% off
        NZD 651 NZD 471
      • DCA 07:00
        11h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Tue, Oct 20 | Frontier Airlines
        SEA 16:27
        26h 32m
        1 stop
        DCA 21:59
        Seattle - Washington D.C. | Sun, Oct 25 | Frontier Airlines
        NZD 474
        27% off
        NZD 651 NZD 474
      • DCA 07:00
        11h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Wed, Oct 21 | Frontier Airlines
        SEA 19:41
        23h 17m
        1 stop
        DCA 21:58
        Seattle - Washington D.C. | Tue, Oct 27 | Frontier Airlines
        NZD 475
        27% off
        NZD 651 NZD 475
      • WAS 13:00
        17h 25m
        1 stop
        SEA 14:00
        Washington D.C. - Seattle | Thu, Oct 8 | Normal Airline
        SEA 15:00
        6h
        Direct
        WAS 16:00
        Seattle - Washington D.C. | Sat, Oct 10 | Normal Airline
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      • Cheapest nonstop
        DCA 16:45
        5h 50m
        Direct
        SEA 19:35
        Washington D.C. - Seattle | Mon, Nov 2 | Delta Air Lines
        NZD 269 NZD 421
        36% off
        36% off
        NZD 421 NZD 269
      • DCA 16:45
        5h 50m
        Direct
        SEA 19:35
        Washington D.C. - Seattle | Thu, Nov 5 | Delta Air Lines
        NZD 303 NZD 421
        28% off
        28% off
        NZD 421 NZD 303
      • DCA 18:00
        18h 51m
        1 stop
        SEA 09:51
        Washington D.C. - Seattle | Thu, Oct 22 | Frontier Airlines
        NZD 238 NZD 421
        43% off
        43% off
        NZD 421 NZD 238
      • DCA 07:00
        11h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Fri, Oct 9 | Frontier Airlines
        NZD 266
        37% off
        NZD 421 NZD 266
      • DCA 18:00
        24h 8m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Mon, Oct 12 | Frontier Airlines
        NZD 266
        37% off
        NZD 421 NZD 266
      • DCA 13:00
        29h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Sat, Nov 14 | Frontier Airlines
        NZD 279
        34% off
        NZD 421 NZD 279
      • DCA 17:00
        10h 11m
        1 stop
        SEA 00:11
        Washington D.C. - Seattle | Sat, Oct 10 | American Airlines
        NZD 284
        33% off
        NZD 421 NZD 284
      • DCA 07:00
        11h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Tue, Nov 24 | Frontier Airlines
        NZD 290
        31% off
        NZD 421 NZD 290
      • DCA 18:00
        24h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Wed, Oct 28 | Frontier Airlines
        NZD 291
        31% off
        NZD 421 NZD 291
      • DCA 07:00
        11h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Mon, Oct 26 | Frontier Airlines
        NZD 296
        30% off
        NZD 421 NZD 296
      • DCA 07:00
        11h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Fri, Oct 30 | Frontier Airlines
        NZD 298
        28% off
        NZD 421 NZD 298
      • DCA 07:00
        29h 51m
        1 stop
        SEA 09:51
        Washington D.C. - Seattle | Sat, Nov 7 | Frontier Airlines
        NZD 302
        28% off
        NZD 421 NZD 302
      • DCA 13:06
        29h 2m
        1 stop
        SEA 15:08
        Washington D.C. - Seattle | Thu, Oct 8 | Frontier Airlines
        NZD 303
        28% off
        NZD 421 NZD 303
      • DCA 07:00
        11h 12m
        1 stop
        SEA 15:12
        Washington D.C. - Seattle | Thu, Nov 5 | Frontier Airlines
        NZD 307
        27% off
        NZD 421 NZD 307
      • WAS 13:00
        17h 25m
        1 stop
        SEA 14:00
        Washington D.C. - Seattle | Thu, Oct 8 | Normal Airline
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Flight fares from Ronald Reagan Washington National Airport to Seattle-Tacoma 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 Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport

What is the cheapest month to fly from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Ronald Reagan Washington National Airport to Seattle-Tacoma 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 Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport are usually in February, with an average price of NZD 121. It is best to avoid November, when the average price can reach NZD 760.

NZD 760
NZD 441
NZD 121
0
  • NZD 121
    Feb
  • NZD 514
    Mar
  • NZD 480
    Apr
  • NZD 596
    May
  • NZD 493
    Jun
  • NZD 581
    Jul
  • NZD 694
    Aug
  • NZD 576
    Sep
  • NZD 544
    Oct
  • NZD 760
    Nov
  • NZD 456
    Dec
  • NZD 254
    Jan

What is the cheapest day of the week to fly from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average ticket prices from Ronald Reagan Washington National Airport to Seattle-Tacoma 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 Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport is Saturday, with average prices usually lower than other days. Avoid departing on Thursday as prices are typically highest on that day.

NZD 682
NZD 483
NZD 284
NZD 85
    Cheapest
  • NZD 550
    Mon
  • NZD 611
    Tue
  • NZD 571
    Wed
  • NZD 682
    Thu
  • NZD 541
    Fri
  • NZD 284
    Sat
  • NZD 427
    Sun

Which airline offers the cheapest flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

The cheapest airline flying from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport is Frontier Airlines (from NZD 201) among 9 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From NZD 201
American Airlines
From NZD 249
Delta Air Lines
From NZD 264
Hahn Air
From NZD 270
Alaska Airlines
From NZD 284
Qatar Airways
From NZD 333
United Airlines
From NZD 348
Air Canada
From NZD 387
Jetblue Airways
From NZD 577

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What is the flight schedule from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

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

Flight info.
Departure
Arrival
Weekly Schedule

  1. F9685

    Ronald Reagan Washington National Airport

    07:00

    DCA

    4h 16m

    Direct

    09:16

    DEN

    S M T W T F S
    Search

  2. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S M T W T F S

  3. F9689

    Ronald Reagan Washington National Airport

    18:00

    DCA

    4h 3m

    Direct

    20:03

    DEN

    S M - W T F S
    Search

  4. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S M T W T F S

  5. F9687

    Ronald Reagan Washington National Airport

    13:00

    DCA

    4h 4m

    Direct

    15:04

    DEN

    S - T W T F S
    Search

  6. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S M T W T F S
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About Ronald Reagan Washington National Airport and Seattle-Tacoma International Airport

Learn about Ronald Reagan Washington National Airport (DCA) and Seattle-Tacoma International Airport (SEA) — including location, terminals, transportation, and travel tips.

Flight distance 3,741.3km
Cheapest one-way ticket price NZD 238
Cheapest return ticket price NZD 325

FAQs for Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport Flights

  • How long is the flight from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

    Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport takes about 5 hours 25 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 1 daily flights from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA).
  • The earliest flight from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport departs at 08:00, and the last departs at 17:00, with about 3 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Ronald Reagan Washington National Airport (DCA) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around NZD 903 in October, the most expensive month to book this route.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
  • Delta Air Lines is a very popular airline operating an average of 755 flights per month.
  • One-way flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport currently start from NZD 238, and round-trip fares start from NZD 325. The current lowest fare is a Frontier Airlines flight departing on Thu, Oct 22; prices may vary depending on availability.
  • Yes. Alaska Airlines and Delta Air Lines operate direct flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport, with an average flight time of 5 hours 20 minutes, and around 21 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport is NZD 564. Prices may vary depending on the departure date, airline, and availability.
  • Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport operates around 21 weekly flights, mainly by Alaska Airlines and Delta Air Lines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Ronald Reagan Washington National Airport and Seattle-Tacoma International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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.