Seattle

$138+ Cheap flights from Reagan-National (DCA) to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/22. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
May 24 — May 311
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in February or January, booked 52 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from Reagan-National to Seattle

Cheapest flights from Reagan-National to Seattle
Explore the most affordable flight options available from Reagan-National to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2026.

This Super.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
DCA
-
SEA
1 stop29h 49m
Frontier
Tue 5/127:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/20$247
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
DCA
-
SEA
1 stop29h 49m
Frontier
Fri 5/157:50 pm
SEA
-
DCA
1 stop23h 08m
Frontier
Deal found 4/20$249
This CheapOair deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 pm
DCA
-
SEA
1 stop19h 06m
Frontier
Mon 6/83:19 pm
SEA
-
DCA
1 stop27h 40m
Frontier
Deal found 4/20$250
This Frontier deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
DCA
-
SEA
1 stop10h 01m
Frontier
Fri 6/57:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/19$255
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:00 am
DCA
-
SEA
1 stop10h 01m
Frontier
Thu 6/47:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/20$256
This Super.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/91:59 pm
DCA
-
SEA
1 stop22h 50m
Frontier
Wed 5/137:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/20$257
This Booking.com deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/67:00 am
DCA
-
SEA
1 stop29h 49m
Frontier
Mon 6/17:50 pm
SEA
-
DCA
1 stop23h 08m
Frontier
Deal found 4/19$258
This Frontier deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:59 am
DCA
-
SEA
1 stop10h 06m
Frontier
Wed 6/37:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/20$260
This American Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:22 pm
DCA
-
SEA
1 stop9h 54m
American Airlines
Fri 5/2911:58 pm
SEA
-
DCA
1 stop7h 09m
American Airlines
Deal found 4/22$261
This Super.com deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/131:59 pm
DCA
-
SEA
1 stop22h 50m
Frontier
Wed 5/207:50 pm
SEA
-
DCA
1 stop14h 09m
Frontier
Deal found 4/21$262
This Trip.com deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/277:59 am
DCA
-
SEA
1 stop10h 06m
Frontier
Fri 5/17:12 pm
SEA
-
DCA
1 stop14h 47m
Frontier
Deal found 4/20$263
This Southwest deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:35 pm
DCA
-
SEA
1 stop10h 00m
Southwest
Mon 8/2411:00 pm
SEA
-
DCA
1 stop10h 05m
Southwest
Deal found 4/20$265

Find flight deals from Reagan-National to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$247
(Super.com)

One-way from

$138
(Southwest)

Popular in

March

Cheapest in

February

Average price

$418

Good round-trip deal

$431 or less

Good one-way deal

$257 or less
Provider with most accurate pricing for Washington, D.C. Reagan-National-Seattle/Tacoma Intl flight deals.
Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Seattle/Tacoma Intl flights.
From Washington, D.C. Reagan-National to Seattle/Tacoma Intl
One-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl
High demand for flights, 0% potential price rise
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Average for round-trip flights in April 2026
Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 7/14

4:35 pm-7:41 pm

Nonstop6h 06m

Seattle/Tacoma Intl

Thu 7/23

7:20 am-3:21 pm

Nonstop5h 01m

$297

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 8/31

5:00 pm-7:51 pm

Nonstop5h 51m

Seattle/Tacoma Intl

Thu 9/10

1:43 pm-9:59 pm

Nonstop5h 16m

$302

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 6/1

6:59 pm-8:17 am

1 stop16h 18m

Seattle/Tacoma Intl

Wed 6/3

1:45 pm-9:59 pm

Nonstop5h 14m

$337

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 9/22

5:00 pm-7:51 pm

Nonstop5h 51m

Seattle/Tacoma Intl

Sat 9/26

8:00 am-4:27 pm

Nonstop5h 27m

$345

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Fri 7/3

6:59 pm-11:59 pm

1 stop8h 00m

Seattle/Tacoma Intl

Thu 7/9

10:40 pm-10:09 am

1 stop8h 29m

$347

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 5/28

7:45 pm-12:05 am

1 stop7h 20m

Seattle/Tacoma Intl

Thu 6/4

5:30 am-9:55 pm

2 stops13h 25m

$352

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Fri 6/5

6:15 pm-11:57 pm

1 stop8h 42m

Seattle/Tacoma Intl

Thu 6/11

7:20 am-3:26 pm

Nonstop5h 06m

$366

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 5/28

8:00 am-10:59 am

Nonstop5h 59m

Seattle/Tacoma Intl

Wed 6/3

8:00 am-4:19 pm

Nonstop5h 19m

$382

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 7/13

4:35 pm-7:41 pm

Nonstop6h 06m

Seattle/Tacoma Intl

Thu 7/23

7:20 am-3:21 pm

Nonstop5h 01m

$407

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 8/4

4:50 pm-11:05 pm

2 stops9h 15m

Seattle/Tacoma Intl

Sun 8/9

9:25 pm-2:50 pm

2 stops14h 25m

$410

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 22 resultsSorted by cheapest first
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3

Compare providers for flights from Reagan-National to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Reagan-National to Seattle in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
Trip.comPrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Reagan-National to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Reagan-National with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Reagan-National Airport to Seattle

How far ahead should I book a flight from Washington, D.C. Reagan-National Airport to Seattle?

The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 51 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $293). Flying from Washington, D.C. Reagan-National Airport to Seattle in March is currently the most expensive (average of $546). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DCA to SEA?

Find hourly flight availability from Reagan-National to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Reagan-National Airport to Seattle as you normally would.

How much does it cost to fly round-trip from Washington, D.C. Reagan-National Airport to Seattle?

The best insider tips for Washington, D.C. Reagan-National Airport to Seattle flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Reagan-National Airport to Seattle trip
Our travel experts
Emily Zemler

Emily Zemler

Expert on DCA

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated April 24, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andHawaiian Airlines from Washington, D.C. Reagan-National Airport to Seattle by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Comfort

7.8

Overall

7.9

Food

7.0

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to Seattle from Washington, D.C. Reagan-National?

    For a flight from Washington, D.C. Reagan-National to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 4 inbound flights from Washington, D.C. Reagan-National per day. 7 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. Reagan-National on a regular basis.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Seattle?

    A quick flight from Washington, D.C. Reagan-National Airport to Seattle can take about 5h 51m. Delta provides one of the quickest options available for as low as $302. Airlines will cover a distance of 2321 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Washington, D.C. Reagan-National Airport to Seattle round-trip?

    According to our current data, Frontier ($119), Hawaiian Airlines ($168), and Delta ($178) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Seattle. These flights start at 71% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Reagan-National Airport to Seattle one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $101. Frontier flights start at $109 while deals on Delta start at $128 one-way.

  • What are the most reliable airlines from Washington, D.C. Reagan-National Airport to Seattle?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Reagan-National Airport to Seattle on time: Japan Airlines (85%), Korean Air (85%), Alaska Airlines (70%).

  • What are the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle?

    The cheapest flight price from Washington, D.C. Reagan-National Airport to Seattle is $188. On average you can expect to pay $720. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $227.

  • Can I find deals for flights from Reagan-National to Seattle that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Reagan-National to Seattle.

  • Can I find deals for business class flights from Reagan-National to Seattle?

    Yes. Cheapflights offers flight deals from Reagan-National to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $293). Flying from Washington, D.C. Reagan-National Airport to Seattle in March is currently the most expensive (average of $546). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
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Snoqualmie
Kent
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Top 7 airlines flying from Reagan-National to Seattle

Discover the top 7 airlines that operate flights from Reagan-National to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$289FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$168Average$421FlexibilityNo cancel feeOn-time85%
DeltaCheapest$178Average$361FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$208Average$396FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$216Average$524FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$218Average$392FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$263Average$521FlexibilityNo cancel feeOn-time75%

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