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Cheap flights from Seattle to Washington, D.C. Reagan-National Airport 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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
4 Aug — 11 Aug1
1 adult

Cheap flight deals from Seattle to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). 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 30 July 2025.

Round-trip from

C$ 354

One-way from

C$ 206

Popular in

December

Cheapest in

September

Average price

C$ 632

Good round-trip deal

C$ 205 or less
Alaska Airlines
  • Alaska Airlines
  • 9/9-30/9
  • Nonstop
  • 10h 59m total
  • Seattle to Washington, D.C.
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Delta
  • Delta
  • 26/8
  • Nonstop
  • 5h 05m total
  • Seattle to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 58 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 33 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
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Find flight deals from Seattle to Reagan-National

Cheapest flights from Seattle to Reagan-National
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 July 2025.

Tue 9/91:35 p.m.SEA - DCA
Nonstop5h 09mAlaska Airlines
Wed 1/105:06 p.m.DCA - SEA
Nonstop5h 50mAlaska Airlines
Deal found 30/7C$ 354
Wed 8/101:46 p.m.SEA - DCA
Nonstop5h 13mHawaiian Airlines
Wed 15/109:59 a.m.DCA - SEA
1 stop11h 43mHawaiian Airlines
Deal found 29/7C$ 368
Wed 27/87:20 a.m.SEA - DCA
Nonstop5h 05mDelta
Wed 3/94:59 p.m.DCA - SEA
Nonstop5h 51mDelta
Deal found 30/7C$ 396
Tue 26/88:00 a.m.SEA - DCA
2 stops11h 45mSouthwest
Sat 30/82:45 p.m.DCA - SEA
1 stop8h 10mSouthwest
Deal found 29/7C$ 403

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Reagan-National 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 30 July 2025.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Seattle

Fly to

Reagan-National

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 9/9

1:35 p.m.-9:44 p.m.

Nonstop5h 09m

Washington, D.C. Reagan-National

Tue 30/9

5:06 p.m.-7:56 p.m.

Nonstop5h 50m

C$ 354

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 8/10

1:46 p.m.-9:59 p.m.

Nonstop5h 13m

Washington, D.C. Reagan-National

Wed 15/10

9:59 a.m.-6:42 p.m.

1 stop11h 43m

C$ 368

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 27/8

7:20 a.m.-3:25 p.m.

Nonstop5h 05m

Washington, D.C. Reagan-National

Wed 3/9

4:59 p.m.-7:50 p.m.

Nonstop5h 51m

C$ 396

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 26/8

8:00 a.m.-10:45 p.m.

2 stops11h 45m

Washington, D.C. Reagan-National

Sat 30/8

2:45 p.m.-7:55 p.m.

1 stop8h 10m

C$ 403

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 26/8

7:20 a.m.-3:25 p.m.

Nonstop5h 05m

C$ 206

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 20/8

6:45 a.m.-8:15 p.m.

2 stops10h 30m

C$ 212

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 20/11

7:15 a.m.-9:05 p.m.

1 stop10h 50m

C$ 218

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 3/9

5:20 a.m.-4:06 p.m.

1 stop7h 46m

C$ 246

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 1/11

6:20 a.m.-10:42 p.m.

2 stops13h 22m

C$ 295

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

Best time to book a flight from Seattle to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Seattle 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 Seattle to Washington, D.C. Reagan-National Airport

How far ahead should I book a flight from Seattle to Washington, D.C. Reagan-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Reagan-National. Price data was last updated on 25 July 2025.

The best time to book flights from Seattle to Washington, D.C. Reagan-National Airport is 88 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 Seattle to Washington, D.C. Reagan-National Airport?

Currently, March is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 263). Flying from Seattle to Washington, D.C. Reagan-National Airport in August is currently the most expensive (average of C$ 361). 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 SEA to DCA?

Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 30 July 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Washington, D.C. Reagan-National Airport in the morning. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight at noon.

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

Explore weekly flight availability from Seattle to Reagan-National. 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 30 July 2025.

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

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated 30 July 2025.
Read through reviews of airlines operating flights from Seattle to Washington, D.C. Reagan-National Airport, such as Alaska Airlines,Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Reagan-National. 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 from for flights from Seattle to Washington, D.C. Reagan-National?

    If you book a flight to Washington, D.C. Reagan-National from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 18.4 km from the centre of Seattle. There are 9 flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National per day from 0 different airlines.

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

    Flying on Alaska Airlines is currently your cheapest option to Washington, D.C. Reagan-National Airport, with prices starting at C$ 354. Additional round-trip tickets that might be worth considering are offered by Hawaiian Airlines and Delta, with the lowest prices starting at C$ 368 and C$ 396, respectively. Users have found that Alaska Airlines is 44% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Washington, D.C. Reagan-National Airport one-way?

    C$ 206 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Southwest and Hawaiian Airlines, with prices starting from C$ 212 and C$ 218, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. Reagan-National Airport consider choosing Delta (92%), Alaska Airlines (65%) or Hawaiian Airlines (65%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Washington, D.C. Reagan-National Airport?

    Looking at all options, your cheapest flight can be booked for C$ 205. While the most popular route (Seattle/Tacoma Intl - Washington, D.C. Reagan-National) can be booked for C$ 363 on average our data indicates C$ 205 when flying from Seattle to Washington, D.C. Reagan-National Airport.

  • Can I find deals for flights from Seattle to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Seattle to Reagan-National flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Reagan-National.

  • Can I find deals for business class flights from Seattle to Reagan-National?

    Yes. Cheapflights offers flight deals from Seattle to Reagan-National 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 Seattle to Washington, D.C. Reagan-National Airport?

    Currently, March is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of C$ 263). Flying from Seattle to Washington, D.C. Reagan-National Airport in August is currently the most expensive (average of C$ 361). 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
Herndon
Hanover
Reston
Fairfax
Ellicott City
Oxon Hill
Gaithersburg
Arlington
Alexandria
Manassas
Fredericksburg
Rockville

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Alternative routes for Seattle to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Dulles Intl flights

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