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$139+ 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 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in September or November, booked 74 days in advance, depart on a Tuesday or Thursday and return on a Friday

Find 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 October 28, 2025.

This CheapOair deal was found by Cheapflights users on 10/26. 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.
Sat 11/156:00 pmDCA - SEA
1 stop21h 13mFrontier
Sat 1/172:09 pmSEA - DCA
1 stop19h 55mFrontier
Deal found 10/26$232
This Kiwi.com deal was found by Cheapflights users on 10/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/158:15 amDCA - SEA
2 stops13h 17mFrontier
Tue 11/181:37 pmSEA - DCA
1 stop20h 25mFrontier
Deal found 10/27$233
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:00 pmDCA - SEA
1 stop9h 10mFrontier
Sun 1/112:54 pmSEA - DCA
1 stop19h 12mFrontier
Deal found 10/26$236
This KAYAK deal was found by Cheapflights users on 10/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:00 pmDCA - SEA
Nonstop6h 13mAlaska Airlines
Sat 12/138:00 amSEA - DCA
Nonstop5h 08mAlaska Airlines
Deal found 10/25$237
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:00 pmDCA - SEA
1 stop21h 07mFrontier
Mon 11/178:22 pmSEA - DCA
2 stops22h 37mFrontier
Deal found 10/26$238
This CheapOair deal was found by Cheapflights users on 10/27. 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.
Tue 11/186:00 pmDCA - SEA
1 stop21h 07mFrontier
Mon 11/241:01 pmSEA - DCA
1 stop29h 58mFrontier
Deal found 10/27$243
This Mytrip deal was found by Cheapflights users on 10/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/278:00 amDCA - SEA
1 stop30h 56mFrontier
Thu 12/41:09 pmSEA - DCA
1 stop24h 50mFrontier
Deal found 10/27$244
This CheapOair deal was found by Cheapflights users on 10/27. 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 12/36:00 pmDCA - SEA
1 stop21h 14mFrontier
Fri 12/53:40 pmSEA - DCA
1 stop27h 19mFrontier
Deal found 10/27$246
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:15 amDCA - SEA
2 stops13h 17mFrontier
Mon 11/172:22 pmSEA - DCA
1 stop23h 37mFrontier
Deal found 10/26$250
This CheapOair deal was found by Cheapflights users on 10/27. 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.
Thu 11/62:00 pmDCA - SEA
1 stop25h 13mFrontier
Mon 11/102:22 pmSEA - DCA
1 stop23h 37mFrontier
Deal found 10/27$252

Cheap 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 October 28, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$232
(CheapOair)

One-way from

$139
(Trip.com)

Popular in

April

Cheapest in

September

Average price

$437

Good round-trip deal

$366 or less

Good one-way deal

$186 or less
Provider with most accurate pricing for Washington, D.C. Reagan-National-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Seattle/Tacoma Intl flights.
Search Deals
From Washington, D.C. Reagan-National to Seattle/Tacoma Intl
Search Deals
One-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($4 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
Search Deals

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 October 28, 2025.
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

Reagan-National

Fly to

Seattle

Route

Depart

Return

Price

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 2/18

8:00 am-10:55 am

Nonstop5h 55m

Seattle/Tacoma Intl

Sat 2/21

1:45 pm-9:55 pm

Nonstop5h 10m

$239

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 12/10

8:00 am-11:11 am

Nonstop6h 11m

Seattle/Tacoma Intl

Mon 12/15

1:56 pm-9:59 pm

Nonstop5h 03m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 3/3

9:30 am-6:51 pm

1 stop12h 21m

Seattle/Tacoma Intl

Wed 3/4

7:00 am-9:10 pm

1 stop11h 10m

$258

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sun 2/15

5:10 pm-10:24 pm

1 stop8h 14m

Seattle/Tacoma Intl

Fri 2/20

8:00 am-8:55 pm

1 stop9h 55m

$258

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 1/14

9:59 am-5:52 pm

1 stop10h 53m

Seattle/Tacoma Intl

Sun 1/18

7:15 am-9:00 pm

1 stop10h 45m

$258

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 1/19

5:09 pm-10:33 pm

1 stop8h 24m

Seattle/Tacoma Intl

Fri 1/23

6:20 am-8:00 pm

1 stop10h 40m

$258

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 2/19

4:28 pm-11:00 pm

1 stop9h 32m

Seattle/Tacoma Intl

Sun 2/22

11:59 pm-10:55 am

1 stop7h 56m

$259

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 2/18

12:00 pm-7:03 pm

1 stop10h 03m

Seattle/Tacoma Intl

Sat 2/21

11:59 pm-9:54 am

1 stop6h 55m

$259

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 2/14

5:10 pm-10:24 pm

1 stop8h 14m

Seattle/Tacoma Intl

Thu 2/19

1:45 pm-9:55 pm

Nonstop5h 10m

$269

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 1/12

5:01 pm-8:07 pm

Nonstop6h 06m

Seattle/Tacoma Intl

Tue 1/20

8:06 am-8:00 pm

1 stop8h 54m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 22 results
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
Trip.comPrice Accuracy2 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice 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 Washington, D.C. Reagan-National Airport-Seattle flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Washington, D.C. Reagan-National Airport-Seattle flight deals on Cheapflights vs. CheapOair >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 CheapOair the most. CheapOair 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?

Use this chart to determine the optimal time to book a round-trip flight from Reagan-National to Seattle. Price data was last updated on October 24, 2025.

The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 74 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, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $141). Flying from Washington, D.C. Reagan-National Airport to Seattle in January is currently the most expensive (average of $276). 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 October 28, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 27% on flights from Washington, D.C. Reagan-National Airport to Seattle by exploring options for tickets in the evening.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Seattle. Price data was last updated on October 26, 2025.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Seattle flight should consider departing on Monday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Reagan-National Airport to Seattle trip
Airports
DCA

For a stress-free departure, use DCA's Metro stop on the Yellow and Blue lines for easy and affordable access.

Read more about DCAby Emily Zemler
SEA

Take the Link light rail from SEA to downtown Seattle for an inexpensive, 40-minute journey with ample luggage space.

Read more about SEAby Brandon Schultz
Our travel experts
Emily Zemler

Emily Zemler

Expert on DCA

Emily Zemler

Emily Zemler

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

Brandon Schultz

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 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 October 28, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Delta, and Hawaiian 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.
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
11,199 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
7.9
Good
7,995 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Hawaiian Airlines
7.8
Good
2,794 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
11,033 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Frontier
5.8
Fair
3,122 reviews
Alaska Airlines
8.0
Very good
11,199 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Crew

8.5

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

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 5 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 55m. Alaska Airlines provides one of the quickest options available for as low as $239. Airlines will cover a distance of 2321 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, Frontier ($138), Hawaiian Airlines ($178), and Delta ($207) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Seattle. These flights start at 68% lower than the current average price 3 months from now.

  • 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: Finnair (100%), Alaska Airlines (93%), Hawaiian Airlines (93%).

  • 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 $139. On average you can expect to pay $683. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $196.

  • 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, March is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $141). Flying from Washington, D.C. Reagan-National Airport to Seattle in January is currently the most expensive (average of $276). 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
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Alternative routes for Reagan-National to Seattle

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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 October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$138Average$285FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$178Average$522FlexibilityNo cancel feeOn-time85%
DeltaCheapest$207Average$405FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$282Average$409FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$282Average$546FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$296Average$495FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$332Average$493FlexibilityNo cancel feeOn-time63%

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