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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 € 131 and round-trip from € 195. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      DCA 16:45
      5h 40m
      Direct
      SEA 19:25
      Washington D.C. - Seattle | Wed, Oct 28 | Delta Air Lines
      SEA 07:20
      5h 3m
      Direct
      DCA 15:23
      Seattle - Washington D.C. | Mon, Nov 2 | Delta Air Lines
      € 213 € 350
      39% off
      39% off
      € 350 € 213
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Mon, Nov 23 | Delta Air Lines
      SEA 11:58
      5h 8m
      Direct
      IAD 20:06
      Seattle - Washington D.C. | Mon, Nov 30 | Delta Air Lines
      € 250 € 350
      28% off
      28% off
      € 350 € 250
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Mon, Nov 23 | Alaska Airlines
      SEA 21:49
      4h 55m
      Direct
      IAD 05:44
      Seattle - Washington D.C. | Mon, Nov 30 | Alaska Airlines
      € 259 € 350
      26% off
      26% off
      € 350 € 259
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Tue, Nov 24 | Delta Air Lines
      SEA 11:58
      5h 8m
      Direct
      IAD 20:06
      Seattle - Washington D.C. | Sun, Nov 29 | Delta Air Lines
      € 267
      24% off
      € 350 € 267
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      SEA 15:56
      5h 3m
      Direct
      IAD 23:59
      Seattle - Washington D.C. | Mon, Nov 2 | Alaska Airlines
      € 286
      18% off
      € 350 € 286
    • DCA 10:13
      8h 30m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Mon, Nov 23 | American Airlines
      SEA 10:47
      7h 5m
      1 stop
      DCA 20:52
      Seattle - Washington D.C. | Mon, Nov 30 | American Airlines
      € 195
      44% off
      € 350 € 195
    • DCA 07:00
      11h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Mon, Nov 23 | Frontier Airlines
      SEA 16:27
      26h 23m
      1 stop
      DCA 21:50
      Seattle - Washington D.C. | Mon, Nov 30 | Frontier Airlines
      € 235
      33% off
      € 350 € 235
    • DCA 18:30
      9h 10m
      1 stop
      SEA 00:40
      Washington D.C. - Seattle | Tue, Nov 24 | Hahn Air
      SEA 00:15
      12h
      1 stop
      DCA 15:15
      Seattle - Washington D.C. | Sun, Nov 29 |
      € 248
      28% off
      € 350 € 248
    • DCA 17:10
      8h 49m
      1 stop
      SEA 22:59
      Washington D.C. - Seattle | Wed, Oct 28 | American Airlines
      SEA 23:59
      8h
      1 stop
      DCA 10:59
      Seattle - Washington D.C. | Mon, Nov 2 | American Airlines
      € 257
      27% off
      € 350 € 257
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
      SEA 15:00
      6h
      Direct
      WAS 16:00
      Seattle - Washington D.C. | Fri, Oct 30 | Normal Airline
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    • Cheapest
      DCA 18:00
      24h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Thu, Dec 3 | Frontier Airlines
      € 131 € 215
      39% off
      39% off
      € 215 € 131
    • DCA 16:25
      6h 21m
      Direct
      SEA 19:46
      Washington D.C. - Seattle | Tue, Dec 15 | Delta Air Lines
      € 136 € 215
      37% off
      37% off
      € 215 € 136
    • DCA 13:00
      29h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Tue, Nov 24 | Frontier Airlines
      € 140 € 215
      35% off
      35% off
      € 215 € 140
    • DCA 07:00
      11h 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Wed, Dec 23 | Frontier Airlines
      € 147
      32% off
      € 215 € 147
    • DCA 07:00
      11h 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Fri, Dec 25 | Frontier Airlines
      € 147
      32% off
      € 215 € 147
    • DCA 07:00
      11h 40m
      1 stop
      SEA 15:40
      Washington D.C. - Seattle | Fri, Dec 18 | Frontier Airlines
      € 147
      32% off
      € 215 € 147
    • DCA 18:00
      24h 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Thu, Dec 24 | Frontier Airlines
      € 149
      31% off
      € 215 € 149
    • DCA 18:00
      24h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Thu, Nov 26 | Frontier Airlines
      € 149
      31% off
      € 215 € 149
    • DCA 13:00
      29h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Sat, Nov 7 | Frontier Airlines
      € 149
      31% off
      € 215 € 149
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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    • Cheapest nonstop
      DCA 16:25
      6h 21m
      Direct
      SEA 19:46
      Washington D.C. - Seattle | Tue, Dec 15 | Delta Air Lines
      € 136 € 215
      37% off
      37% off
      € 215 € 136
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Wed, Dec 30 | Delta Air Lines
      € 157 € 508
      69% off
      69% off
      € 508 € 157
    • DCA 17:04
      6h
      Direct
      SEA 20:04
      Washington D.C. - Seattle | Tue, Dec 15 | Alaska Airlines
      € 180 € 215
      16% off
      16% off
      € 215 € 180
    • DCA 08:00
      6h 3m
      Direct
      SEA 11:03
      Washington D.C. - Seattle | Wed, Jan 6 | Alaska Airlines
      € 182
      64% off
      € 508 € 182
    • DCA 08:00
      6h 17m
      Direct
      SEA 11:17
      Washington D.C. - Seattle | Sat, Dec 5 | Alaska Airlines
      € 183
      64% off
      € 508 € 183
    • DCA 17:05
      6h 17m
      Direct
      SEA 20:22
      Washington D.C. - Seattle | Wed, Dec 9 | Alaska Airlines
      € 185
      64% off
      € 508 € 185
    • DCA 17:11
      6h 2m
      Direct
      SEA 20:13
      Washington D.C. - Seattle | Sat, Nov 14 | Alaska Airlines
      € 187
      63% off
      € 508 € 187
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      € 187
      63% off
      € 508 € 187
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Fri, Dec 25 | Delta Air Lines
      € 205
      60% off
      € 508 € 205
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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    • Cheapest nonstop
      DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Wed, Dec 30 | Delta Air Lines
      € 157 € 508
      69% off
      69% off
      € 508 € 157
    • DCA 08:00
      6h 3m
      Direct
      SEA 11:03
      Washington D.C. - Seattle | Wed, Jan 6 | Alaska Airlines
      € 182 € 508
      64% off
      64% off
      € 508 € 182
    • DCA 08:00
      6h 17m
      Direct
      SEA 11:17
      Washington D.C. - Seattle | Sat, Dec 5 | Alaska Airlines
      € 183 € 508
      64% off
      64% off
      € 508 € 183
    • DCA 17:05
      6h 17m
      Direct
      SEA 20:22
      Washington D.C. - Seattle | Wed, Dec 9 | Alaska Airlines
      € 185
      64% off
      € 508 € 185
    • DCA 17:11
      6h 2m
      Direct
      SEA 20:13
      Washington D.C. - Seattle | Sat, Nov 14 | Alaska Airlines
      € 187
      63% off
      € 508 € 187
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      € 187
      63% off
      € 508 € 187
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Fri, Dec 25 | Delta Air Lines
      € 205
      60% off
      € 508 € 205
    • DCA 16:25
      6h 20m
      Direct
      SEA 19:45
      Washington D.C. - Seattle | Sat, Dec 12 | Delta Air Lines
      € 215
      57% off
      € 508 € 215
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Wed, Nov 25 | Delta Air Lines
      € 241
      53% off
      € 508 € 241
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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    • Cheapest nonstop
      DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      € 187 € 514
      64% off
      64% off
      € 514 € 187
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Tue, Oct 27 | Alaska Airlines
      € 193 € 514
      62% off
      62% off
      € 514 € 193
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Tue, Oct 27 | Delta Air Lines
      € 223 € 514
      56% off
      56% off
      € 514 € 223
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Sat, Oct 31 | Alaska Airlines
      € 423
      18% off
      € 514 € 423
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Fri, Oct 30 | Alaska Airlines
      € 426
      17% off
      € 514 € 426
    • DCA 08:39
      8h 41m
      1 stop
      SEA 14:20
      Washington D.C. - Seattle | Sun, Nov 1 | American Airlines
      € 196
      62% off
      € 514 € 196
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Wed, Oct 28 | American Airlines
      € 202
      61% off
      € 514 € 202
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Tue, Oct 27 | American Airlines
      € 205
      60% off
      € 514 € 205
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Fri, Oct 30 | American Airlines
      € 431
      16% off
      € 514 € 431
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Sat, Nov 7 | Delta Air Lines
      € 214 € 550
      61% off
      61% off
      € 550 € 214
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Mon, Nov 2 | Delta Air Lines
      € 223 € 550
      59% off
      59% off
      € 550 € 223
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Thu, Nov 5 | Delta Air Lines
      € 246 € 550
      55% off
      55% off
      € 550 € 246
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Fri, Nov 6 | Delta Air Lines
      € 254
      54% off
      € 550 € 254
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Sun, Nov 1 | Delta Air Lines
      € 371
      33% off
      € 550 € 371
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Tue, Nov 3 | Delta Air Lines
      € 433
      21% off
      € 550 € 433
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Fri, Oct 30 | Delta Air Lines
      € 448
      19% off
      € 550 € 448
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Sun, Nov 8 | Delta Air Lines
      € 462
      16% off
      € 550 € 462
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Sat, Oct 31 | Alaska Airlines
      € 423
      17% off
      € 508 € 423
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

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

Which month has the cheapest one-way flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

The data is based on Trip.com data from the past 12 months and shows the average one-way fares by month from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport.

Based on Trip.com 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 € 61. November sees the highest fares, around € 381.

€ 381
€ 221
€ 61
0
  • € 61
    Feb
  • € 258
    Mar
  • € 241
    Apr
  • € 299
    May
  • € 247
    Jun
  • € 291
    Jul
  • € 348
    Aug
  • € 289
    Sep
  • € 273
    Oct
  • € 381
    Nov
  • € 229
    Dec
  • € 127
    Jan

Which day of the week has the cheapest flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport?

The data is based on Trip.com data from the past 12 months and shows the average fares by each day of the week from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport.

Based on Trip.com data from the past 12 months, the cheapest day for flights from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport is Saturday, with average prices lower than other days. Try to avoid departing on Thursday, as fares are typically the highest.

€ 342
€ 241
€ 140
€ 39
    Cheapest
  • € 276
    Mon
  • € 306
    Tue
  • € 282
    Wed
  • € 342
    Thu
  • € 271
    Fri
  • € 140
    Sat
  • € 214
    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 € 119) among 8 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From € 119
American Airlines
From € 163
Alaska Airlines
From € 168
Hahn Air
From € 187
Air Canada
From € 190
Delta Air Lines
From € 207
United Airlines
From € 229
Jetblue Airways
From € 320

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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. DL786

    Ronald Reagan Washington National Airport

    16:45

    DCA

    5h 50m

    19:35

    SEA

    S M T W T F S
    Search

  2. DL2869

    Ronald Reagan Washington National Airport

    06:00

    DCA

    1h 48m

    Direct

    07:48

    DTW

    S M T W T F S
    Search

  3. DL734

    Detroit Metropolitan Wayne County Airport

    08:25

    DTW

    5h 17m

    Direct

    10:42

    SEA

    S M T W T F S

  4. AS009

    Ronald Reagan Washington National Airport

    17:08

    DCA

    5h 50m

    Direct

    19:58

    PDX

    S M T W T F S
    Search

  5. AS2254

    Portland International Airport

    17:38

    PDX

    1h 2m

    Direct

    18:40

    SEA

    S - - - - - S

  6. AA795

    Ronald Reagan Washington National Airport

    14:59

    DCA

    1h 46m

    Direct

    16:45

    CLT

    S - - - - - S
    Search

  7. AA3252

    Charlotte Douglas International Airport

    14:08

    CLT

    5h 55m

    Direct

    17:03

    SEA

    S - - - - - S

  8. AS015

    Ronald Reagan Washington National Airport

    10:59

    DCA

    5h 24m

    Direct

    13:23

    SAN

    S M T W T F S
    Search

  9. AS622

    San Diego International Airport

    14:48

    SAN

    3h 7m

    Direct

    17:55

    SEA

    S - - W T - S

  10. F9685

    Ronald Reagan Washington National Airport

    07:00

    DCA

    4h 16m

    Direct

    09:16

    DEN

    S M T W T F S
    Search

  11. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S - T - T F -

  12. AS015

    Ronald Reagan Washington National Airport

    10:59

    DCA

    5h 24m

    Direct

    13:23

    SAN

    S M T W T F S
    Search

  13. AS735

    San Diego International Airport

    17:00

    SAN

    3h 2m

    Direct

    20:02

    SEA

    S - - - - - S

  14. F9689

    Ronald Reagan Washington National Airport

    18:00

    DCA

    4h 10m

    Direct

    20:10

    DEN

    S M - W T F S
    Search

  15. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S - T - T F -

  16. F9687

    Ronald Reagan Washington National Airport

    13:00

    DCA

    4h 9m

    Direct

    15:09

    DEN

    S - T W T F S
    Search

  17. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S - T - T F -
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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 € 131
Cheapest return ticket price € 195

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 17 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 2 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 € 545 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 International Airport (SEA) at 10:53.
  • The latest flight departs from Ronald Reagan Washington National Airport (DCA) at 17:06 and arrives in Seattle-Tacoma International Airport (SEA) at 19:56.
    • 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 € 131, and round-trip fares start from € 195. The current lowest fare is a Frontier Airlines flight departing on Thu, Dec 3; 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 14 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 € 264. 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.

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

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are shown before payment. Charges for checked baggage, meals, Wi-Fi, and other optional services may also appear in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours, and with many routes refreshed in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.