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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 € 129 and round-trip from € 195. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      DCA 16:25
      6h 21m
      Direct
      SEA 19:46
      Washington D.C. - Seattle | Tue, Dec 22 | Delta Air Lines
      SEA 07:20
      4h 47m
      Direct
      DCA 15:07
      Seattle - Washington D.C. | Thu, Dec 24 | Delta Air Lines
      € 213 € 330
      35% off
      35% off
      € 330 € 213
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Sat, Nov 14 | Delta Air Lines
      SEA 07:20
      5h 3m
      Direct
      DCA 15:23
      Seattle - Washington D.C. | Tue, Nov 17 | Delta Air Lines
      € 249 € 330
      25% off
      25% off
      € 330 € 249
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Wed, Dec 9 | Delta Air Lines
      SEA 07:20
      4h 53m
      Direct
      DCA 15:13
      Seattle - Washington D.C. | Mon, Dec 14 | Delta Air Lines
      € 250 € 330
      24% off
      24% off
      € 330 € 250
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Tue, Nov 17 | Delta Air Lines
      SEA 11:58
      5h 8m
      Direct
      IAD 20:06
      Seattle - Washington D.C. | Tue, Nov 24 | Delta Air Lines
      € 250
      24% off
      € 330 € 250
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Tue, Nov 17 | Alaska Airlines
      SEA 21:49
      4h 55m
      Direct
      IAD 05:44
      Seattle - Washington D.C. | Tue, Nov 24 | Alaska Airlines
      € 260
      21% off
      € 330 € 260
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Wed, Nov 18 | Delta Air Lines
      SEA 11:58
      5h 8m
      Direct
      IAD 20:06
      Seattle - Washington D.C. | Mon, Nov 23 | Delta Air Lines
      € 267
      19% off
      € 330 € 267
    • DCA 17:11
      6h 2m
      Direct
      SEA 20:13
      Washington D.C. - Seattle | Thu, Nov 19 | Alaska Airlines
      SEA 21:49
      4h 55m
      Direct
      IAD 05:44
      Seattle - Washington D.C. | Sat, Nov 21 | Alaska Airlines
      € 277
      16% off
      € 330 € 277
    • DCA 10:13
      8h 30m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Tue, Nov 17 | American Airlines
      SEA 10:47
      7h 5m
      1 stop
      DCA 20:52
      Seattle - Washington D.C. | Tue, Nov 24 | American Airlines
      € 195
      41% off
      € 330 € 195
    • DCA 14:54
      8h 25m
      1 stop
      SEA 20:19
      Washington D.C. - Seattle | Tue, Dec 22 | American Airlines
      SEA 10:29
      7h 29m
      1 stop
      DCA 20:58
      Seattle - Washington D.C. | Thu, Dec 24 | American Airlines
      € 231
      30% off
      € 330 € 231
    • 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 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Tue, Dec 15 | Frontier Airlines
      € 129 € 184
      30% off
      30% off
      € 184 € 129
    • Cheapest
      DCA 07:00
      11h 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Sat, Dec 5 | Frontier Airlines
      € 129 € 184
      30% off
      30% off
      € 184 € 129
    • Cheapest
      DCA 13:45
      8h 57m
      1 stop
      SEA 19:42
      Washington D.C. - Seattle | Tue, Dec 8 | American Airlines
      € 129 € 184
      30% off
      30% off
      € 184 € 129
    • DCA 07:00
      11h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Fri, Nov 6 | Frontier Airlines
      € 132
      28% off
      € 184 € 132
    • DCA 07:00
      11h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Mon, Nov 9 | Frontier Airlines
      € 138
      25% off
      € 184 € 138
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Sat, Dec 12 | Delta Air Lines
      € 144
      22% off
      € 184 € 144
    • DCA 07:00
      11h 12m
      1 stop
      SEA 15:12
      Washington D.C. - Seattle | Wed, Nov 18 | Frontier Airlines
      € 146
      21% off
      € 184 € 146
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Fri, Dec 4 | Delta Air Lines
      € 146
      21% off
      € 184 € 146
    • DCA 07:00
      11h 43m
      1 stop
      SEA 15:43
      Washington D.C. - Seattle | Mon, Dec 7 | Frontier Airlines
      € 147
      20% off
      € 184 € 147
    • 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 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Sat, Dec 12 | Delta Air Lines
      € 144 € 184
      22% off
      22% off
      € 184 € 144
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Fri, Dec 4 | Delta Air Lines
      € 146 € 184
      21% off
      21% off
      € 184 € 146
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Wed, Dec 30 | Delta Air Lines
      € 157 € 509
      69% off
      69% off
      € 509 € 157
    • DCA 08:00
      6h 3m
      Direct
      SEA 11:03
      Washington D.C. - Seattle | Wed, Jan 6 | Alaska Airlines
      € 182
      64% off
      € 509 € 182
    • DCA 08:00
      6h 17m
      Direct
      SEA 11:17
      Washington D.C. - Seattle | Sat, Dec 5 | Alaska Airlines
      € 183
      64% off
      € 509 € 183
    • DCA 17:05
      6h 17m
      Direct
      SEA 20:22
      Washington D.C. - Seattle | Wed, Dec 9 | Alaska Airlines
      € 185
      64% off
      € 509 € 185
    • DCA 17:11
      6h 2m
      Direct
      SEA 20:13
      Washington D.C. - Seattle | Sat, Nov 14 | Alaska Airlines
      € 187
      63% off
      € 509 € 187
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      € 187
      63% off
      € 509 € 187
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Fri, Dec 25 | Delta Air Lines
      € 205
      60% off
      € 509 € 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 € 509
      69% off
      69% off
      € 509 € 157
    • DCA 08:00
      6h 3m
      Direct
      SEA 11:03
      Washington D.C. - Seattle | Wed, Jan 6 | Alaska Airlines
      € 182 € 509
      64% off
      64% off
      € 509 € 182
    • DCA 08:00
      6h 17m
      Direct
      SEA 11:17
      Washington D.C. - Seattle | Sat, Dec 5 | Alaska Airlines
      € 183 € 509
      64% off
      64% off
      € 509 € 183
    • DCA 17:05
      6h 17m
      Direct
      SEA 20:22
      Washington D.C. - Seattle | Wed, Dec 9 | Alaska Airlines
      € 185
      64% off
      € 509 € 185
    • DCA 17:11
      6h 2m
      Direct
      SEA 20:13
      Washington D.C. - Seattle | Sat, Nov 14 | Alaska Airlines
      € 187
      63% off
      € 509 € 187
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Wed, Oct 28 | Alaska Airlines
      € 187
      63% off
      € 509 € 187
    • DCA 16:50
      6h 22m
      Direct
      SEA 20:12
      Washington D.C. - Seattle | Fri, Dec 25 | Delta Air Lines
      € 205
      60% off
      € 509 € 205
    • DCA 16:25
      6h 20m
      Direct
      SEA 19:45
      Washington D.C. - Seattle | Sat, Dec 12 | Delta Air Lines
      € 215
      57% off
      € 509 € 215
    • DCA 16:25
      6h 2m
      Direct
      SEA 19:27
      Washington D.C. - Seattle | Wed, Nov 25 | Delta Air Lines
      € 249
      51% off
      € 509 € 249
    • 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 € 515
      64% off
      64% off
      € 515 € 187
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Tue, Oct 27 | Alaska Airlines
      € 193 € 515
      63% off
      63% off
      € 515 € 193
    • DCA 16:45
      5h 50m
      Direct
      SEA 19:35
      Washington D.C. - Seattle | Tue, Oct 27 | Delta Air Lines
      € 223 € 515
      56% off
      56% off
      € 515 € 223
    • DCA 17:00
      5h 55m
      Direct
      SEA 19:55
      Washington D.C. - Seattle | Sat, Oct 31 | Alaska Airlines
      € 423
      18% off
      € 515 € 423
    • DCA 08:00
      5h 59m
      Direct
      SEA 10:59
      Washington D.C. - Seattle | Fri, Oct 30 | Alaska Airlines
      € 427
      17% off
      € 515 € 427
    • DCA 08:39
      8h 41m
      1 stop
      SEA 14:20
      Washington D.C. - Seattle | Sun, Nov 1 | American Airlines
      € 196
      62% off
      € 515 € 196
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Wed, Oct 28 | American Airlines
      € 202
      61% off
      € 515 € 202
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Tue, Oct 27 | American Airlines
      € 205
      60% off
      € 515 € 205
    • DCA 14:52
      8h 23m
      1 stop
      SEA 20:15
      Washington D.C. - Seattle | Fri, Oct 30 | American Airlines
      € 432
      16% off
      € 515 € 432
    • 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
      € 509 € 423
    • WAS 13:00
      17h 25m
      1 stop
      SEA 14:00
      Washington D.C. - Seattle | Wed, Oct 28 | Normal Airline
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Displayed flight fares from Washington D.C. to Seattle 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 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, if you’re looking for a low-cost one-way ticket from Ronald Reagan Washington National Airport to Seattle-Tacoma International Airport, the best time to buy is in February, with an average price of € 61. You’ll want to avoid November, when the average price can reach as high as € 381.

€ 381
€ 221
€ 61
0
  • € 61
    Feb
  • € 258
    Mar
  • € 241
    Apr
  • € 299
    May
  • € 247
    Jun
  • € 292
    Jul
  • € 348
    Aug
  • € 289
    Sep
  • € 273
    Oct
  • € 381
    Nov
  • € 229
    Dec
  • € 127
    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 day to depart from Ronald Reagan Washington National Airport to Seattle-Tacoma International 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.

€ 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 € 131) among 8 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From € 131
Delta Air Lines
From € 144
American Airlines
From € 151
Alaska Airlines
From € 168
Air Canada
From € 190
United Airlines
From € 207
Hahn Air
From € 213
Jetblue Airways
From € 302

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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. DL2869

    Ronald Reagan Washington National Airport

    06:00

    DCA

    1h 48m

    Direct

    07:48

    DTW

    S M T W T F S
    Search

  2. DL734

    Detroit Metropolitan Wayne County Airport

    08:25

    DTW

    5h 17m

    Direct

    10:42

    SEA

    S M T W T F S

  3. AS009

    Ronald Reagan Washington National Airport

    17:08

    DCA

    5h 50m

    Direct

    19:58

    PDX

    S M T W T F S
    Search

  4. AS2254

    Portland International Airport

    17:38

    PDX

    1h 2m

    Direct

    18:40

    SEA

    S - - - - - S

  5. AA795

    Ronald Reagan Washington National Airport

    14:59

    DCA

    1h 46m

    Direct

    16:45

    CLT

    S - - - - - S
    Search

  6. AA3252

    Charlotte Douglas International Airport

    14:08

    CLT

    5h 55m

    Direct

    17:03

    SEA

    S - - - - - S

  7. F9685

    Ronald Reagan Washington National Airport

    07:00

    DCA

    4h 16m

    Direct

    09:16

    DEN

    S M T W T F S
    Search

  8. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S - T - T F -

  9. AS015

    Ronald Reagan Washington National Airport

    10:59

    DCA

    5h 24m

    Direct

    13:23

    SAN

    S M T W T F S
    Search

  10. AS735

    San Diego International Airport

    17:00

    SAN

    3h 2m

    Direct

    20:02

    SEA

    S - - - - - S

  11. F9689

    Ronald Reagan Washington National Airport

    18:00

    DCA

    4h 10m

    Direct

    20:10

    DEN

    S M - W T F S
    Search

  12. F91175

    Denver International Airport

    13:07

    DEN

    3h 5m

    Direct

    15:12

    SEA

    S - T - T F -

  13. F9687

    Ronald Reagan Washington National Airport

    13:00

    DCA

    4h 9m

    Direct

    15:09

    DEN

    S - T W T F S
    Search

  14. 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 € 129
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 11:03.
  • 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 € 129, and round-trip fares start from € 195. The current lowest fare is a Frontier Airlines flight departing on Tue, Dec 15; 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.

Most popular destination

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, regulatory fees, etc) with all fees confirmed before payment. Fees for baggage, 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 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.