HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$149+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
avr. 16 — avr. 231
mer. 4/16
mer. 4/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Reagan-National to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Seattle/Tacoma Intl are usually found in January or March, booked 74 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

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 avril 11, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$280
(Frontier)

One-way from

$149
(Delta)

Popular in

June

Cheapest in

January

Average price

$467

Good round-trip deal

$298 or less

Good one-way deal

$196 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. 8% potential increase in price ($44 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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

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 avril 11, 2025.

This Frontier deal was found by Cheapflights users on 4/10. 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.
sam. 4/197:00 amDCA - SEA
1 stop11h 32mFrontier
mar. 4/296:00 amSEA - DCA
1 stop7h 59mFrontier
Deal found 4/10$280
This Alaska Airlines deal was found by Cheapflights users on 4/9. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 5/38:00 amDCA - SEA
Nonstop5h 40mAlaska Airlines
sam. 5/31:50 pmSEA - DCA
Nonstop5h 09mAlaska Airlines
Deal found 4/9$281
This Delta deal was found by Cheapflights users on 4/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/64:50 pmDCA - SEA
Nonstop6h 01mDelta
mer. 5/217:35 amSEA - DCA
Nonstop5h 14mDelta
Deal found 4/10$287
This Expedia deal was found by Cheapflights users on 4/10. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/141:00 pmDCA - SEA
1 stop13h 49mMultiple Airlines
mer. 5/211:48 pmSEA - DCA
Nonstop5h 11mMultiple Airlines
Deal found 4/10$288
This Kiwi.com deal was found by Cheapflights users on 4/10. 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.
sam. 5/38:00 amDCA - SEA
Nonstop5h 40mHawaiian Airlines
sam. 5/101:50 pmSEA - DCA
Nonstop5h 09mHawaiian Airlines
Deal found 4/10$291
This American Airlines deal was found by Cheapflights users on 4/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 5/34:00 pmDCA - SEA
1 stop8h 59mAmerican Airlines
ven. 5/91:10 amSEA - DCA
1 stop8h 31mAmerican Airlines
Deal found 4/10$332
This United Airlines deal was found by Cheapflights users on 4/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 5/175:59 pmDCA - SEA
1 stop10h 00mUnited Airlines
lun. 5/2611:50 pmSEA - DCA
1 stop7h 07mUnited Airlines
Deal found 4/10$348
This Southwest deal was found by Cheapflights users on 4/10. 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.
mar. 5/64:40 pmDCA - SEA
1 stop9h 20mSouthwest
mar. 5/205:00 amSEA - DCA
2 stops10h 55mSouthwest
Deal found 4/10$352

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 avril 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

sam. 4/19

7:00 am-3:32 pm

1 stop11h 32m

Seattle/Tacoma Intl

mar. 4/29

6:00 am-4:59 pm

1 stop7h 59m

$280

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sam. 5/3

8:00 am-10:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

sam. 5/3

1:50 pm-9:59 pm

Nonstop5h 09m

$281

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 5/6

4:50 pm-7:51 pm

Nonstop6h 01m

Seattle/Tacoma Intl

mer. 5/21

7:35 am-3:49 pm

Nonstop5h 14m

$287

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mer. 5/14

1:00 pm-11:49 pm

1 stop13h 49m

Seattle/Tacoma Intl

mer. 5/21

1:48 pm-9:59 pm

Nonstop5h 11m

$288

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sam. 5/3

8:00 am-10:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

sam. 5/10

1:50 pm-9:59 pm

Nonstop5h 09m

$291

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sam. 5/3

4:00 pm-9:59 pm

1 stop8h 59m

Seattle/Tacoma Intl

ven. 5/9

1:10 am-12:41 pm

1 stop8h 31m

$332

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 6/3

5:00 pm-10:42 pm

1 stop8h 42m

Seattle/Tacoma Intl

dim. 6/8

11:50 pm-11:59 am

1 stop9h 09m

$337

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 5/6

4:40 pm-11:00 pm

1 stop9h 20m

Seattle/Tacoma Intl

mar. 5/20

5:00 am-6:55 pm

2 stops10h 55m

$352

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 6/3

4:59 pm-7:50 pm

Nonstop5h 51m

$149

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mer. 5/28

8:59 am-4:53 pm

1 stop10h 54m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 17 results
1
2

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
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapOairPrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
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?

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 April 4, 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, 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 July is currently the most expensive (average of $411). 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 avril 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 36% 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 March 30, 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.

Weekly flight availability from Washington, D.C. Reagan-National Airport to Seattle

Explore weekly flight availability from Reagan-National to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated avril 11, 2025.

The most flights from DCA to SEA are scheduled on a Thursday (9 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 avril 11, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Washington, D.C. to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,851 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,910 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,366 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,636 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Entertainment

7.1

Comfort

7.9

Crew

8.5

Food

7.1

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 7 inbound flights from Washington, D.C. Reagan-National per day. 8 airlines have flights to Seattle/Tacoma Intl from Washington, D.C. Reagan-National on a regular basis.

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

    According to our current data, Frontier ($280), Alaska Airlines ($281), and Hawaiian Airlines ($291) offers the cheapest pricing from Washington, D.C. Reagan-National Airport to Seattle. These flights start at 41% 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 Delta, which is currently one of the cheapest options available, starting at $149. Hawaiian Airlines flights start at $158 while deals on Frontier start at $174 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: LATAM Airlines (91%), Kenya Airways (91%), Virgin Atlantic (91%).

  • 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 $143. On average you can expect to pay $762. The most popular route, (Washington, D.C. Reagan-National - Seattle/Tacoma Intl), can usually be booked for $230.

  • 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 July is currently the most expensive (average of $411). 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
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Mukilteo
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Reagan-National to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Seattle flights
Baltimore to Seattle flights
Dulles Intl to Portland flights
Reagan-National to Portland flights
Baltimore to Portland flights
Dulles Intl to Spokane flights
Reagan-National to Spokane flights
Baltimore to Spokane flights
Dulles Intl to Pasco flights
Baltimore to Pasco flights
Dulles Intl to Pullman flights
Reagan-National to Pullman flights
Dulles Intl to Wenatchee flights
Reagan-National to Pasco flights
Baltimore to Pullman flights
Baltimore to Walla Walla flights
Reagan-National to Wenatchee flights
Baltimore to Wenatchee flights
Reagan-National to Bellingham flights
Dulles Intl to Walla Walla flights
Reagan-National to Walla Walla flights
Dulles Intl to Bellingham flights
Baltimore to Yakima flights
Baltimore to Bellingham flights
Reagan-National to Yakima flights
Dulles Intl to Yakima flights

Top 8 airlines flying from Reagan-National to Seattle

Discover the top 8 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 avril 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$131Average$382FlexibilityNo cancel feeOn-time62%
FrontierCheapest$155Average$322FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$158Average$579FlexibilityNo cancel feeOn-time85%
DeltaCheapest$248Average$478FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$286Average$457FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$290Average$472FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$306Average$536FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$317Average$572FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.