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$133+ 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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 October, booked 85 days in advance, depart on a Tuesday or Thursday and return on a Friday

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 September 11, 2025.

Round-trip from

$236
(Kiwi.com)

One-way from

$133
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$366

Good round-trip deal

$319 or less

Good one-way deal

$196 or less
From Washington, D.C. Reagan-National to Seattle/Tacoma Intl
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One-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 3% potential increase in price ($15 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Washington, D.C. Reagan-National to Seattle/Tacoma Intl.
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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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/227:00 amDCA - SEA
2 stops35h 16mFrontier
Mon 10/278:43 pmSEA - DCA
1 stop17h 16mFrontier
Deal found 9/9$236
This CheapOair deal was found by Cheapflights users on 9/10. 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 9/131:00 pmDCA - SEA
1 stop10h 39mFrontier
Tue 9/237:00 amSEA - DCA
1 stop26h 10mFrontier
Deal found 9/10$237
This CheapOair deal was found by Cheapflights users on 9/10. 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 11/78:15 amDCA - SEA
1 stop30h 58mFrontier
Tue 11/1112:58 pmSEA - DCA
1 stop20h 03mFrontier
Deal found 9/10$238
This Southwest deal was found by Cheapflights users on 9/10. 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.
Tue 10/2111:45 amDCA - SEA
2 stops11h 05mSouthwest
Wed 10/298:35 amSEA - DCA
2 stops9h 15mSouthwest
Deal found 9/10$239
This CheapOair deal was found by Cheapflights users on 9/9. 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 9/237:00 amDCA - SEA
1 stop18h 59mFrontier
Wed 10/17:00 amSEA - DCA
1 stop11h 59mFrontier
Deal found 9/9$240
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/312:00 pmDCA - SEA
2 stops22h 18mFrontier
Thu 11/61:08 pmSEA - DCA
1 stop29h 51mFrontier
Deal found 9/10$241
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Fri 10/36:31 pmDCA - SEA
1 stop8h 59mFrontier
Sun 10/512:05 pmSEA - DCA
2 stops21h 05mFrontier
Deal found 9/10$243
This CheapOair deal was found by Cheapflights users on 9/9. 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 9/171:00 pmDCA - SEA
1 stop12h 59mFrontier
Fri 9/266:12 amSEA - DCA
1 stop12h 47mFrontier
Deal found 9/9$244
This Frontier deal was found by Cheapflights users on 9/10. 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.
Wed 9/171:00 pmDCA - SEA
1 stop12h 59mFrontier
Sat 9/207:00 amSEA - DCA
1 stop11h 59mFrontier
Deal found 9/10$245
This Frontier deal was found by Cheapflights users on 9/9. 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.
Sat 9/201:00 pmDCA - SEA
1 stop10h 39mFrontier
Tue 9/237:00 amSEA - DCA
1 stop11h 59mFrontier
Deal found 9/9$246
This CheapOair deal was found by Cheapflights users on 9/9. 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 10/17:00 amDCA - SEA
1 stop18h 59mFrontier
Tue 10/141:02 pmSEA - DCA
1 stop20h 02mFrontier
Deal found 9/9$247

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 September 11, 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

Sat 11/1

5:00 pm-8:03 pm

Nonstop6h 03m

Seattle/Tacoma Intl

Tue 11/4

1:52 pm-9:59 pm

Nonstop5h 07m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 11/18

5:00 pm-8:03 pm

Nonstop6h 03m

Seattle/Tacoma Intl

Mon 11/24

1:57 pm-9:59 pm

Nonstop5h 02m

$257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 10/22

12:35 pm-10:45 pm

2 stops13h 10m

Seattle/Tacoma Intl

Sat 10/25

5:45 am-3:15 pm

1 stop6h 30m

$258

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 12/9

5:00 pm-8:13 pm

Nonstop6h 13m

Seattle/Tacoma Intl

Tue 12/16

1:56 pm-9:59 pm

Nonstop5h 03m

$277

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 10/1

8:00 am-10:53 am

Nonstop5h 53m

Seattle/Tacoma Intl

Tue 10/7

6:30 am-9:14 pm

1 stop11h 44m

$287

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 10/29

12:35 pm-10:45 pm

2 stops13h 10m

Seattle/Tacoma Intl

Mon 11/3

6:35 am-6:15 pm

1 stop8h 40m

$303

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Fri 10/3

4:59 pm-7:40 pm

Nonstop5h 41m

Seattle/Tacoma Intl

Sat 10/4

7:25 am-3:30 pm

Nonstop5h 05m

$307

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 11/10

8:00 am-11:03 am

Nonstop6h 03m

Seattle/Tacoma Intl

Wed 11/12

5:20 am-4:00 pm

1 stop7h 40m

$307

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 10/15

4:59 pm-7:50 pm

Nonstop5h 51m

Seattle/Tacoma Intl

Tue 10/21

7:25 am-3:28 pm

Nonstop5h 03m

$307

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 10/9

9:25 am-3:00 pm

1 stop8h 35m

Seattle/Tacoma Intl

Thu 10/16

5:15 am-3:00 pm

1 stop6h 45m

$322

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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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

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 August 29, 2025.

The best time to book flights from Washington, D.C. Reagan-National Airport to Seattle is 85 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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $238). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of $388). 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 September 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 30% 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 September 7, 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.

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 September 11, 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
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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
2,723 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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
3,177 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Crew

8.5

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 8 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 53m. Hawaiian Airlines provides one of the quickest options available for as low as $287. 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 ($143), Hawaiian Airlines ($178), and Delta ($230) 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: Japan Airlines (82%), Korean Air (82%), Finnair (78%).

  • 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 $148. On average you can expect to pay $501. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $172.

  • 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, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Seattle (average of $238). Flying from Washington, D.C. Reagan-National Airport to Seattle in June is currently the most expensive (average of $388). 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
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
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Issaquah
Aberdeen
Shoreline

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Alternative routes for Reagan-National to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$143Average$283FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$178Average$525FlexibilityNo cancel feeOn-time85%
DeltaCheapest$230Average$420FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$284Average$411FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$287Average$543FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$296Average$481FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$311Average$489FlexibilityNo cancel feeOn-time63%

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