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Cheap flights from Washington, D.C. Reagan-National Airport to Seattle from C$ 209

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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SEA
8 Feb — 15 Feb1
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 3 February 2025.

Round-trip from

C$ 417

One-way from

C$ 209

Popular in

March

Cheapest in

April

Average price

C$ 622
Delta
  • Delta
  • 11/3-14/3
  • Nonstop
  • 11h 08m total
  • Washington, D.C. to Seattle
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Delta
  • Delta
  • 15/3
  • Nonstop
  • 6h 01m total
  • Washington, D.C. to Seattle
Search Deals
High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (C$ 29 potential savings vs. average RT price).
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Average for round-trip flights in February 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 3 February 2025.

Tue 11/34:40 p.m.DCA - SEA
Nonstop6h 01mDelta
Fri 14/37:23 a.m.SEA - DCA
Nonstop5h 07mDelta
Deal found 3/2C$ 417
Tue 25/26:55 a.m.DCA - SEA
1 stop7h 55mSouthwest
Wed 19/39:10 a.m.SEA - DCA
1 stop8h 20mSouthwest
Deal found 2/2C$ 446
Mon 24/23:35 p.m.DCA - SEA
1 stop10h 03mJetBlue
Tue 18/311:48 p.m.SEA - DCA
1 stop11h 10mJetBlue
Deal found 2/2C$ 452
Sat 30/85:30 p.m.DCA - SEA
Nonstop5h 55mAlaska Airlines
Sat 13/98:00 a.m.SEA - DCA
1 stop9h 55mAlaska Airlines
Deal found 3/2C$ 475
Sun 20/41:00 p.m.DCA - SEA
1 stop9h 01mUnited Airlines
Sat 26/411:45 p.m.SEA - DCA
1 stop7h 13mUnited Airlines
Deal found 3/2C$ 551

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 3 February 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 11/3

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

Nonstop6h 01m

Seattle/Tacoma Intl

Fri 14/3

7:23 a.m.-3:30 p.m.

Nonstop5h 07m

C$ 417

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 25/2

6:55 a.m.-11:50 a.m.

1 stop7h 55m

Seattle/Tacoma Intl

Wed 19/3

9:10 a.m.-8:30 p.m.

1 stop8h 20m

C$ 446

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 24/2

3:35 p.m.-10:38 p.m.

1 stop10h 03m

Seattle/Tacoma Intl

Tue 18/3

11:48 p.m.-1:58 p.m.

1 stop11h 10m

C$ 452

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 23/4

8:00 a.m.-10:40 a.m.

Nonstop5h 40m

Seattle/Tacoma Intl

Wed 30/4

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

Nonstop5h 09m

C$ 483

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sun 20/4

1:00 p.m.-7:01 p.m.

1 stop9h 01m

Seattle/Tacoma Intl

Sat 26/4

11:45 p.m.-9:58 a.m.

1 stop7h 13m

C$ 551

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 15/3

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

Nonstop6h 01m

C$ 209

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 15/3

3:30 p.m.-10:53 p.m.

1 stop10h 23m

C$ 224

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 27/3

3:50 p.m.-10:38 p.m.

1 stop9h 48m

C$ 257

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Tue 25/2

8:00 a.m.-11:06 a.m.

Nonstop6h 06m

C$ 260

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Fri 7/3

5:55 p.m.-8:20 a.m.

2 stops17h 25m

C$ 268

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 11 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 31 January 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$ 261). Flying from Washington, D.C. Reagan-National Airport to Seattle in April is currently the most expensive (average of C$ 406). 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 3 February 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.

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 3 February 2025.

The most flights from DCA to SEA are scheduled on a Monday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (6 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 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 3 February 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
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,564 reviews
Southwest
8.1
Very good
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,681 reviews
Southwest
8.1
Very good
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,427 reviews
Southwest
8.1
Very good
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,145 reviews
Southwest
8.1
Very good
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,889 reviews
Southwest
8.1
Very good
4,564 reviews
Check prices

Crew

8.7

Entertainment

7.7

Boarding

8.2

Overall

8.1

Comfort

8.1

Food

7.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 7 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 Delta. Our recent data shows that you can find tickets from as low as C$ 417 on this airline. Additional options worth looking into are Southwest and JetBlue, starting at C$ 446 and C$ 452 round-trip. You may be able to fly from Washington, D.C. Reagan-National Airport to Seattle for 41% 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 Delta, which is currently one of the cheapest options available, starting at C$ 209. United Airlines flights start at C$ 224 while deals on JetBlue start at C$ 257 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: Korean Air (77%), Alaska Airlines (74%), Hawaiian Airlines( 74%).

  • 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$ 261). Flying from Washington, D.C. Reagan-National Airport to Seattle in April is currently the most expensive (average of C$ 406). 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
Tacoma
Marysville
Bothell
Leavenworth
Olympia
Lynnwood

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