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Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport flight

Explore the cheapest one-way and round-trip flights from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport over the next 90 days, with one-way fares from MXN2,620 and round-trip from MXN3,942. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        DCA 4:25 PM
        6h 21m
        Nonstop
        SEA 7:46 PM
        Washington D.C. - Seattle | Sat, Dec 5 | Delta Air Lines
        SEA 7:20 AM
        4h 47m
        Nonstop
        DCA 3:07 PM
        Seattle - Washington D.C. | Mon, Dec 7 | Delta Air Lines
        MXN4,320 MXN8,183
        47% off
        47% off
        MXN8,183 MXN4,320
      • DCA 4:45 PM
        5h 50m
        Nonstop
        SEA 7:35 PM
        Washington D.C. - Seattle | Sat, Oct 31 | Delta Air Lines
        SEA 11:58 AM
        5h 8m
        Nonstop
        IAD 8:06 PM
        Seattle - Washington D.C. | Sat, Nov 7 | Delta Air Lines
        MXN5,072 MXN8,183
        38% off
        38% off
        MXN8,183 MXN5,072
      • DCA 8:00 AM
        5h 59m
        Nonstop
        SEA 10:59 AM
        Washington D.C. - Seattle | Sat, Oct 31 | Alaska Airlines
        SEA 9:49 PM
        4h 55m
        Nonstop
        IAD 5:44 AM
        Seattle - Washington D.C. | Sat, Nov 7 | Alaska Airlines
        MXN5,259 MXN8,183
        36% off
        36% off
        MXN8,183 MXN5,259
      • DCA 4:45 PM
        5h 50m
        Nonstop
        SEA 7:35 PM
        Washington D.C. - Seattle | Sun, Nov 1 | Delta Air Lines
        SEA 11:58 AM
        5h 8m
        Nonstop
        IAD 8:06 PM
        Seattle - Washington D.C. | Fri, Nov 6 | Delta Air Lines
        MXN5,408
        34% off
        MXN8,183 MXN5,408
      • DCA 8:00 AM
        5h 55m
        Nonstop
        SEA 10:55 AM
        Washington D.C. - Seattle | Sat, Dec 5 | Alaska Airlines
        SEA 3:59 PM
        5h
        Nonstop
        IAD 11:59 PM
        Seattle - Washington D.C. | Mon, Dec 7 | Alaska Airlines
        MXN5,805
        28% off
        MXN8,183 MXN5,805
      • DCA 10:13 AM
        8h 30m
        1 stop
        SEA 3:43 PM
        Washington D.C. - Seattle | Sat, Oct 31 | American Airlines
        SEA 10:47 AM
        7h 5m
        1 stop
        DCA 8:52 PM
        Seattle - Washington D.C. | Sat, Nov 7 | American Airlines
        MXN3,942
        52% off
        MXN8,183 MXN3,942
      • DCA 2:54 PM
        8h 25m
        1 stop
        SEA 8:19 PM
        Washington D.C. - Seattle | Sat, Dec 5 | American Airlines
        SEA 10:29 AM
        7h 29m
        1 stop
        DCA 8:58 PM
        Seattle - Washington D.C. | Mon, Dec 7 | American Airlines
        MXN4,673
        43% off
        MXN8,183 MXN4,673
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Sat, Oct 31 | Frontier Airlines
        SEA 4:27 PM
        26h 23m
        1 stop
        DCA 9:50 PM
        Seattle - Washington D.C. | Sat, Nov 7 | Frontier Airlines
        MXN4,762
        42% off
        MXN8,183 MXN4,762
      • DCA 6:30 PM
        9h 10m
        1 stop
        SEA 12:40 AM
        Washington D.C. - Seattle | Sun, Nov 1 | Hahn Air
        SEA 12:15 AM
        12h
        1 stop
        DCA 3:15 PM
        Seattle - Washington D.C. | Fri, Nov 6 |
        MXN5,026
        39% off
        MXN8,183 MXN5,026
      • DCA 1:00 PM
        29h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Wed, Oct 21 | Frontier Airlines
        SEA 4:27 PM
        16h 37m
        1 stop
        DCA 12:04 PM
        Seattle - Washington D.C. | Sat, Oct 24 | Frontier Airlines
        MXN5,430
        34% off
        MXN8,183 MXN5,430
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Fri, Oct 23 | Frontier Airlines
        SEA 9:16 PM
        30h 4m
        1 stop
        IAD 6:20 AM
        Seattle - Washington D.C. | Sun, Oct 25 | Frontier Airlines
        MXN5,938
        27% off
        MXN8,183 MXN5,938
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Mon, Nov 16 | Frontier Airlines
        SEA 4:27 PM
        16h 42m
        1 stop
        DCA 12:09 PM
        Seattle - Washington D.C. | Wed, Nov 18 | Frontier Airlines
        MXN5,973
        27% off
        MXN8,183 MXN5,973
      • WAS 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Washington D.C. - Seattle | Thu, Oct 8 | Normal Airline
        SEA 3:00 PM
        6h
        Nonstop
        WAS 4:00 PM
        Seattle - Washington D.C. | Sat, Oct 10 | Normal Airline
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      • Cheapest nonstop
        DCA 5:11 PM
        6h 2m
        Nonstop
        SEA 8:13 PM
        Washington D.C. - Seattle | Sat, Nov 7 | Alaska Airlines
        MXN3,674 MXN5,051
        27% off
        27% off
        MXN5,051 MXN3,674
      • DCA 5:00 PM
        6h 2m
        Nonstop
        SEA 8:02 PM
        Washington D.C. - Seattle | Mon, Nov 9 | Alaska Airlines
        MXN3,687 MXN5,051
        27% off
        27% off
        MXN5,051 MXN3,687
      • DCA 1:00 PM
        29h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Sat, Oct 10 | Frontier Airlines
        MXN2,620 MXN5,051
        48% off
        48% off
        MXN5,051 MXN2,620
      • DCA 1:00 PM
        29h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Sun, Nov 8 | Frontier Airlines
        MXN2,835
        44% off
        MXN5,051 MXN2,835
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Wed, Nov 18 | Frontier Airlines
        MXN2,946
        42% off
        MXN5,051 MXN2,946
      • DCA 7:00 AM
        11h 40m
        1 stop
        SEA 3:40 PM
        Washington D.C. - Seattle | Wed, Dec 2 | Frontier Airlines
        MXN2,968
        41% off
        MXN5,051 MXN2,968
      • DCA 6:00 PM
        24h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Tue, Nov 10 | Frontier Airlines
        MXN3,014
        40% off
        MXN5,051 MXN3,014
      • DCA 7:00 AM
        29h 51m
        1 stop
        SEA 9:51 AM
        Washington D.C. - Seattle | Sun, Nov 1 | Frontier Airlines
        MXN3,071
        39% off
        MXN5,051 MXN3,071
      • DCA 6:00 PM
        24h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Fri, Oct 16 | Frontier Airlines
        MXN3,095
        39% off
        MXN5,051 MXN3,095
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Wed, Oct 28 | Frontier Airlines
        MXN3,120
        38% off
        MXN5,051 MXN3,120
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Fri, Nov 13 | Frontier Airlines
        MXN3,209
        36% off
        MXN5,051 MXN3,209
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Mon, Nov 16 | Frontier Airlines
        MXN3,209
        36% off
        MXN5,051 MXN3,209
      • DCA 7:00 AM
        11h 12m
        1 stop
        SEA 3:12 PM
        Washington D.C. - Seattle | Wed, Nov 11 | Frontier Airlines
        MXN3,209
        36% off
        MXN5,051 MXN3,209
      • WAS 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Washington D.C. - Seattle | Thu, Oct 8 | Normal Airline
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Displayed flight fares from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport

What is the cheapest month for one-way flights from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport?

Data is based on average one-way flight prices from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport in Trip.com's database over the past 12 months.

Based on Trip.com’s data from the past 12 months, if you’re looking for a low-cost one-way ticket from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport, the best time to buy is in February, with an average price of MXN1,228. You’ll want to avoid November, when the average price can reach as high as MXN7,730.

MXN7,730
MXN4,479
MXN1,228
0
  • MXN1,228
    Feb
  • MXN5,224
    Mar
  • MXN4,879
    Apr
  • MXN6,059
    May
  • MXN5,012
    Jun
  • MXN5,909
    Jul
  • MXN7,055
    Aug
  • MXN5,851
    Sep
  • MXN5,531
    Oct
  • MXN7,730
    Nov
  • MXN4,632
    Dec
  • MXN2,578
    Jan

What is the cheapest day of the week to fly from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. 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 Intl. 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 day to depart from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport is Saturday, with average fares typically lower than other days. You’ll want to avoid flying on Thursday, as ticket prices are usually the highest that day.

MXN6,928
MXN4,906
MXN2,884
MXN862
    Cheapest
  • MXN5,590
    Mon
  • MXN6,206
    Tue
  • MXN5,801
    Wed
  • MXN6,928
    Thu
  • MXN5,497
    Fri
  • MXN2,884
    Sat
  • MXN4,340
    Sun

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

The cheapest airline flying from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport is Frontier Airlines (from MXN2,620) among 8 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From MXN2,620
Alaska Airlines
From MXN3,397
American Airlines
From MXN3,413
Delta Air Lines
From MXN3,842
Air Canada
From MXN3,856
Hahn Air
From MXN4,317
United Airlines
From MXN4,686
Jetblue Airways
From MXN6,120

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What is the flight schedule from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. 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

    7:00 AM

    DCA

    4h 16m

    Nonstop

    9:16 AM

    DEN

    S M T W T F S
    Search

  2. F91175

    Denver International Airport

    1:07 PM

    DEN

    3h 5m

    Nonstop

    3:12 PM

    SEA

    S M T W T F S

  3. F9689

    Ronald Reagan Washington National Airport

    6:00 PM

    DCA

    4h 3m

    Nonstop

    8:03 PM

    DEN

    S M - W T F S
    Search

  4. F91175

    Denver International Airport

    1:07 PM

    DEN

    3h 5m

    Nonstop

    3:12 PM

    SEA

    S M T W T F S

  5. F9687

    Ronald Reagan Washington National Airport

    1:00 PM

    DCA

    4h 4m

    Nonstop

    3:04 PM

    DEN

    S - T W T F S
    Search

  6. F91175

    Denver International Airport

    1:07 PM

    DEN

    3h 5m

    Nonstop

    3:12 PM

    SEA

    S M T W T F S
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About Ronald Reagan Washington National Airport and Seattle Tacoma Intl. Airport

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

Flight distance 3,741.3 km
Cheapest one-way ticket price MXN2,620
Cheapest return ticket price MXN3,942

FAQs for Ronald Reagan Washington National Airport to Seattle Tacoma Intl. Airport Flights

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

    Ronald Reagan Washington National Airport to Seattle Tacoma Intl. 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 Intl. Airport (SEA).
  • The earliest flight from Ronald Reagan Washington National Airport to Seattle Tacoma Intl. 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 Intl. Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around MXN9,185 in October, the most expensive month to book this route.
  • The earliest flight departs from Ronald Reagan Washington National Airport (DCA) at 08:00 and arrives in Seattle Tacoma Intl. Airport (SEA) at 11:03.
  • The latest flight departs from Ronald Reagan Washington National Airport (DCA) at 17:03 and arrives in Seattle Tacoma Intl. Airport (SEA) at 19:58.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.
  • 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 Intl. Airport currently start from MXN2,620, and round-trip fares start from MXN3,942. The current lowest fare is a Frontier Airlines flight departing on Sat, Oct 10; 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 Intl. 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 Intl. Airport is MXN5,735. Prices may vary depending on the departure date, airline, and availability.
  • Ronald Reagan Washington National Airport to Seattle Tacoma Intl. 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 Intl. 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.

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

Book with no extra fees

Prices displayed in 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, WLAN, 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 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.