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Cheap flights from Washington, D.C. Reagan-National Airport to Seattle from C$ 206

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
13 Mar — 20 Mar1
1 adult

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 8 March 2025.

Round-trip from

C$ 403

One-way from

C$ 206

Popular in

June

Cheapest in

April

Average price

C$ 770
Alaska Airlines
  • Alaska Airlines
  • 26/3-26/3
  • Nonstop
  • 10h 49m total
  • Washington, D.C. to Seattle
Search Deals
Hawaiian Airlines
  • Hawaiian Airlines
  • 8/4
  • Nonstop
  • 6h 00m total
  • Washington, D.C. to Seattle
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (C$ 108 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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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 8 March 2025.

Wed 26/38:00 a.m.DCA - SEA
Nonstop5h 58mAlaska Airlines
Wed 26/32:08 p.m.SEA - DCA
Nonstop4h 51mAlaska Airlines
Deal found 6/3C$ 403
Tue 25/33:50 p.m.DCA - SEA
1 stop9h 48mJetBlue
Tue 1/411:55 p.m.SEA - DCA
1 stop12h 05mJetBlue
Deal found 6/3C$ 410
Thu 3/44:40 p.m.DCA - SEA
Nonstop6h 01mDelta
Fri 11/47:23 a.m.SEA - DCA
Nonstop5h 06mDelta
Deal found 7/3C$ 411
Sat 3/55:10 p.m.DCA - SEA
1 stop8h 18mHawaiian Airlines
Sat 10/51:50 p.m.SEA - DCA
Nonstop5h 09mHawaiian Airlines
Deal found 6/3C$ 426
Thu 27/36:25 a.m.DCA - SEA
1 stop8h 24mUnited Airlines
Sun 30/311:59 p.m.SEA - DCA
1 stop6h 59mUnited Airlines
Deal found 6/3C$ 440
Tue 1/43:05 p.m.DCA - SEA
2 stops11h 40mSouthwest
Tue 8/45:00 a.m.SEA - DCA
2 stops10h 35mSouthwest
Deal found 7/3C$ 454

Find flights from Reagan-National to Seattle within your budget

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 629,999 searches. Data last updated 8 March 2025.

Fly from

Reagan-National

Fly to

Seattle

Route

Depart

Return

Price

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 1/4

4:40 p.m.-7:41 p.m.

Nonstop6h 01m

Seattle/Tacoma Intl

Wed 9/4

7:23 a.m.-3:29 p.m.

Nonstop5h 06m

C$ 411

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 3/5

5:10 p.m.-9:39 p.m.

1 stop7h 29m

Seattle/Tacoma Intl

Thu 8/5

1:50 p.m.-9:59 p.m.

Nonstop5h 09m

C$ 426

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 27/3

6:25 a.m.-11:49 a.m.

1 stop8h 24m

Seattle/Tacoma Intl

Sun 30/3

11:59 p.m.-9:58 a.m.

1 stop6h 59m

C$ 440

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 8/4

3:45 p.m.-10:27 p.m.

1 stop9h 42m

Seattle/Tacoma Intl

Sun 13/4

11:55 p.m.-10:59 a.m.

1 stop8h 04m

C$ 446

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 1/4

2:00 p.m.-11:00 p.m.

2 stops12h 00m

Seattle/Tacoma Intl

Mon 7/4

9:05 a.m.-8:10 p.m.

1 stop8h 05m

C$ 447

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 7/6

5:00 p.m.-7:56 p.m.

Nonstop5h 56m

Seattle/Tacoma Intl

Wed 11/6

7:00 a.m.-9:10 p.m.

1 stop11h 10m

C$ 512

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 7/4

5:55 p.m.-8:55 p.m.

Nonstop6h 00m

C$ 206

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 27/3

7:00 a.m.-12:02 p.m.

1 stop8h 02m

C$ 221

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 5/4

4:40 p.m.-7:41 p.m.

Nonstop6h 01m

C$ 228

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 24/3

5:55 p.m.-8:25 a.m.

2 stops17h 30m

C$ 235

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Showing 1-10 of 15 results
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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.

Travel insights for flights from Reagan-National to Seattle

Get recent, data-driven insights about flights from Reagan-National to Seattle including ideal travel times, pricing trends, and more.

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 28 February 2025.

Booking 74 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Reagan-National Airport to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 C$ 262). Flying from Washington, D.C. Reagan-National Airport to Seattle in April is currently the most expensive (average of C$ 362). 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 8 March 2025.

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

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 18.0 - 168.0 mm per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 8 March 2025.
Read through reviews of airlines operating flights from Washington, D.C. to Seattle, such as Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Southwest
8.1
Very good
4,314 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Alaska Airlines
8.0
Very good
9,716 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Delta
8.0
Very good
8,024 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Hawaiian Airlines
7.9
Good
2,316 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

United Airlines
7.4
Good
8,649 reviews
Southwest
8.1
Very good
4,314 reviews
Check prices

Food

7.1

Boarding

8.2

Crew

8.7

Overall

8.1

Entertainment

7.6

Comfort

8.1

Reviews

1 / 20

8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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?

    Located just 18.4 km from the city centre, Seattle/Tacoma Intl is the airport most travellers will use when flying to Seattle from Washington, D.C. Reagan-National. Booking flights from Washington, D.C. Reagan-National to Seattle/Tacoma Intl (SEA) should be relatively easy as there are 6 daily inbound flights from Washington, D.C. Reagan-National from 0 different airlines.

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

    Our cheapest airline available from Washington, D.C. Reagan-National Airport to Seattle is Alaska Airlines. Our recent data shows that you can find tickets from as low as C$ 403 on this airline. Additional options worth looking into are JetBlue and Delta, starting at C$ 410 and C$ 411 round-trip. You may be able to fly from Washington, D.C. Reagan-National Airport to Seattle for 42% less than the average price by searching for these airlines.

  • 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 Hawaiian Airlines, which is currently one of the cheapest options available, starting at C$ 206. JetBlue flights start at C$ 216 while deals on United Airlines start at C$ 221 one-way.

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

    Before booking your flight to Seattle from Washington, D.C. Reagan-National Airport, check out the most reliable airlines to get you to your destination on time: Japan Airlines (69%), Korean Air (69%), Alaska Airlines( 64%).

  • 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 C$ 262). Flying from Washington, D.C. Reagan-National Airport to Seattle in April is currently the most expensive (average of C$ 362). 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

Travelling 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
Marysville
Bothell
Leavenworth
Tacoma
Olympia
Lynnwood

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Yes, Cheapflights offers price alerts on Reagan-National to Seattle flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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