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Reagan-National

$149+ Cheap flights from Seattle (SEA) to Reagan-National (DCA)

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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Washington, D.C. Reagan-National are usually found in January or February, booked 81 days in advance, depart on a Thursday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to Reagan-National

Cheapest flights from Seattle to Reagan-National
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.

This JetBlue deal was found by Cheapflights users on 6/18. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:55 pm
SEA
-
DCA
1 stop8h 25m
JetBlue
Wed 9/302:30 pm
DCA
-
SEA
1 stop11h 08m
JetBlue
Deal found 6/18$283
This American Airlines deal was found by Cheapflights users on 6/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:10 am
SEA
-
DCA
1 stop8h 03m
American Airlines
Tue 7/285:24 pm
DCA
-
SEA
1 stop8h 32m
American Airlines
Deal found 6/21$295
This Expedia deal was found by Cheapflights users on 6/20. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2812:35 pm
SEA
-
DCA
1 stop30h 24m
Frontier
Wed 8/57:00 am
DCA
-
SEA
1 stop29h 04m
Frontier
Deal found 6/20$298
This United Airlines deal was found by Cheapflights users on 6/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:00 pm
SEA
-
DCA
1 stop6h 55m
United Airlines
Fri 9/183:30 pm
DCA
-
SEA
1 stop10h 15m
United Airlines
Deal found 6/19$300
This Delta deal was found by Cheapflights users on 6/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 am
SEA
-
DCA
Nonstop5h 01m
Delta
Wed 8/124:35 pm
DCA
-
SEA
Nonstop6h 06m
Delta
Deal found 6/19$301
This Kissandfly.com deal was found by Cheapflights users on 6/21. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:20 am
SEA
-
DCA
Nonstop5h 01m
Frontier
Fri 8/216:00 pm
DCA
-
SEA
1 stop18h 19m
Frontier
Deal found 6/21$302
This Kissandfly.com deal was found by Cheapflights users on 6/19. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 am
SEA
-
DCA
Nonstop5h 01m
Frontier
Wed 8/127:00 am
DCA
-
SEA
1 stop29h 04m
Frontier
Deal found 6/19$303
This Delta deal was found by Cheapflights users on 6/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:20 am
SEA
-
DCA
Nonstop5h 01m
Delta
Mon 8/104:35 pm
DCA
-
SEA
Nonstop6h 06m
Delta
Deal found 6/22$305
This Expedia deal was found by Cheapflights users on 6/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3112:35 pm
SEA
-
DCA
1 stop21h 16m
Frontier
Sat 8/87:00 am
DCA
-
SEA
1 stop29h 04m
Frontier
Deal found 6/21$306
This CheapOair deal was found by Cheapflights users on 6/23. 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.
Wed 8/197:06 pm
SEA
-
DCA
1 stop14h 45m
Multiple Airlines
Fri 8/285:00 pm
DCA
-
SEA
1 stop8h 53m
Multiple Airlines
Deal found 6/23$307
This CheapOair deal was found by Cheapflights users on 6/23. 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 7/177:06 pm
SEA
-
DCA
1 stop23h 53m
Frontier
Tue 7/217:00 am
DCA
-
SEA
1 stop29h 17m
Frontier
Deal found 6/23$308

Find flight deals from Seattle to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). 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 June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$283
(JetBlue)

One-way from

$149
(Kissandfly.com)

Popular in

June

Cheapest in

January

Average price

$518

Good round-trip deal

$394 or less

Good one-way deal

$278 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. Reagan-National flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. Reagan-National flights.
Search Deals
From Seattle/Tacoma Intl to Washington, D.C. Reagan-National
Search Deals
One-way flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Reagan-National 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 June 23, 2026.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 8/13

11:00 pm-12:20 pm

1 stop10h 20m

Washington, D.C. Reagan-National

Wed 8/19

10:45 am-6:10 pm

2 stops10h 25m

$326

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 8/6

11:00 pm-12:20 pm

1 stop10h 20m

Washington, D.C. Reagan-National

Sat 8/15

6:05 am-2:20 pm

2 stops11h 15m

$346
Quickest round-trip

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 9/30

7:20 am-3:32 pm

Nonstop5h 12m

Washington, D.C. Reagan-National

Sat 10/3

4:45 pm-7:25 pm

Nonstop5h 40m

$356

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 8/11

11:00 pm-12:05 pm

1 stop10h 05m

Washington, D.C. Reagan-National

Thu 8/13

6:40 pm-11:30 pm

1 stop7h 50m

$360

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 9/22

7:20 am-3:32 pm

Nonstop5h 12m

Washington, D.C. Reagan-National

Tue 11/10

4:40 pm-7:45 pm

Nonstop6h 05m

$376

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 7/22

2:00 pm-8:45 am

2 stops15h 45m

Washington, D.C. Reagan-National

Wed 7/29

4:55 pm-12:45 am

2 stops10h 50m

$391

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 8/19

10:40 pm-10:09 am

1 stop8h 29m

Washington, D.C. Reagan-National

Tue 8/25

4:35 pm-7:41 pm

Nonstop6h 06m

$410

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 7/23

5:30 am-9:55 pm

2 stops13h 25m

Washington, D.C. Reagan-National

Mon 7/27

6:15 am-5:25 pm

1 stop14h 10m

$416

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 7/31

11:44 pm-12:01 pm

1 stop9h 17m

Washington, D.C. Reagan-National

Fri 9/11

2:30 pm-10:38 pm

1 stop11h 08m

$431

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 7/31

9:00 am-6:30 pm

1 stop6h 30m

Washington, D.C. Reagan-National

Sun 8/9

6:10 am-1:40 pm

2 stops10h 30m

$436

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from Seattle to Reagan-National

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 Seattle to Reagan-National in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
eDreamsPrice Accuracy2 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust 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 Seattle-Washington, D.C. Reagan-National Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Washington, D.C. Reagan-National Airport 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 Seattle-Washington, D.C. Reagan-National Airport 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 Seattle to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Seattle 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 Seattle to Washington, D.C. Reagan-National Airport

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

The price you pay for your flight from Seattle to Washington, D.C. Reagan-National Airport may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $269). Flying from Seattle to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $518). 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 SEA to DCA?

Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 23, 2026.

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

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

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

Read more
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.

Read more

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated June 23, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited Airlines from Seattle to Washington, D.C. Reagan-National Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Alaska Airlines
7.9
Good
12,563 reviews
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Delta
7.8
Good
8,424 reviews
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
United Airlines
7.4
Good
9,875 reviews
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
American Airlines
7.1
Good
11,746 reviews
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
Frontier
5.6
Fair
2,870 reviews
Alaska Airlines
7.9
Good
12,563 reviews

Comfort

7.8

Overall

7.9

Boarding

8.1

Food

7.0

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

SEA - RNO

There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Reagan-National. 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 from for flights from Seattle to Washington, D.C. Reagan-National?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Washington, D.C. Reagan-National. 7 airlines have flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National on a regular basis. Booking flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National should not be difficult; the airport handles an average of 4 outbound flights to Washington, D.C. Reagan-National per day.

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

    There are many flights that can get you from Seattle to Washington, D.C. Reagan-National Airport in 8h 03m. Fly via JetBlue, American Airlines, or Frontier to get the fastest option. Seattle and Washington, D.C. Reagan-National Airport are separated by a distance of 2321 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Our cheapest airline available from Seattle to Washington, D.C. Reagan-National Airport is Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $138 on this airline. Additional options worth looking into are Frontier and Delta, starting at $156 and $165 round-trip. Hawaiian Airlines is 66% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Seattle to Washington, D.C. Reagan-National Airport are Frontier ($125), American Airlines ($132), and Southwest ($132).

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. Reagan-National Airport consider choosing Delta (95%), Hawaiian Airlines (92%) or Korean Air (87%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Seattle to Washington, D.C. Reagan-National Airport? While on average our users pay $511, our data indicates the cheapest price to be $191. The most popular route (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), is priced around $264.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Reagan-National 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 Seattle to Washington, D.C. Reagan-National Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $269). Flying from Seattle to Washington, D.C. Reagan-National Airport in June is currently the most expensive (average of $518). 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 Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Arlington
Tysons
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Hyattsville
Manassas
Fredericksburg
Laurel
Hanover
Falls Church
Waldorf
Silver Spring
Largo
Clinton
Hunt Valley

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Seattle to Reagan-National

Discover the top 7 airlines that operate flights from Seattle to Reagan-National. 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 June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$138Average$344FlexibilityNo cancel feeOn-time85%
FrontierCheapest$156Average$326FlexibilityNo cancel feeOn-time62%
DeltaCheapest$165Average$393FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$199Average$512FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$247Average$442FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$256Average$436FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$264Average$460FlexibilityNo cancel feeOn-time71%

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