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Cheap flights from Washington, D.C. Reagan-National Airport to Seattle from $199

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Reagan-National Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:00 pm - 3:40 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
24h 40m1 stop Denver Intl
Frontier Logo
4:58 pm - 4:55 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
20h 57m1 stop Denver Intl
$289Frontier
Thu, Dec 3 - Wed, Dec 9
Frontier Logo
6:00 pm - 3:40 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
24h 40m1 stop Denver Intl
Frontier Logo
4:58 pm - 4:55 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
20h 57m1 stop Denver Intl
$290Frontier
Thu, Dec 3 - Wed, Dec 9
Alaska Airlines Logo
5:05 pm - 8:22 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mnonstop
Alaska Airlines Logo
8:00 am - 4:05 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
5h 05mnonstop
$291Alaska Airlines
Thu, Dec 3 - Wed, Dec 9
Alaska Airlines Logo
5:05 pm - 8:22 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 17mnonstop
Alaska Airlines Logo
2:02 pm - 9:59 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mnonstop
$297Alaska Airlines
Sat, Dec 12 - Mon, Dec 14
Delta Logo
4:25 pm - 7:45 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mnonstop
Delta Logo
7:20 am - 3:06 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mnonstop
$297Delta
Fri, Dec 11 - Thu, Dec 17
Delta Logo
4:25 pm - 7:45 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
6h 20mnonstop
Delta Logo
7:20 am - 3:06 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 46mnonstop
$297Delta
Fri, Dec 4 - Thu, Dec 10
Multiple Airlines Logo
7:00 am - 3:22 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
11h 22m1 stop Denver Intl
Multiple Airlines Logo
2:02 pm - 9:59 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mnonstop
$313Multiple Airlines
Thu, Nov 26 - Thu, Dec 3
Multiple Airlines Logo
7:00 am - 3:22 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
11h 22m1 stop Denver Intl
Multiple Airlines Logo
2:02 pm - 9:59 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
4h 57mnonstop
$313Multiple Airlines
Thu, Nov 26 - Sat, Dec 5
American Airlines Logo
8:34 am - 2:36 pmDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
9h 02m1 stop Chicago O'Hare Intl
American Airlines Logo
10:51 am - 11:55 pmSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
10h 04m1 stop Chicago O'Hare Intl
$317American Airlines
Wed, Dec 2 - Mon, Dec 7
American Airlines Logo
5:00 am - 10:14 amDCA  Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl
8h 14m1 stop Charlotte Douglas
American Airlines Logo
11:39 pm - 10:00 amSEA  Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National
7h 21m1 stop Chicago O'Hare Intl
$317American Airlines
Thu, Dec 3 - Sun, Dec 6

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Frontier flights from Washington, D.C. Reagan-National Airport to Seattle

Our best Frontier deals on Washington, D.C. Reagan-National Airport to Seattle flight tickets
Frontier
Dec 3
DCA6:00 pmWashington, D.C. Reagan-National
24h 40m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
Dec 9
SEA4:58 pmSeattle/Tacoma Intl
20h 57m
1 stop
DCA4:55 pmWashington, D.C. Reagan-National
$289
Frontier
Dec 3
DCA6:00 pmWashington, D.C. Reagan-National
24h 40m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
Dec 9
SEA4:58 pmSeattle/Tacoma Intl
20h 57m
1 stop
DCA4:55 pmWashington, D.C. Reagan-National
$290
Frontier
Dec 4
DCA7:00 amWashington, D.C. Reagan-National
11h 40m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
Dec 11
SEA4:58 pmSeattle/Tacoma Intl
16h 57m
1 stop
DCA12:55 pmWashington, D.C. Reagan-National
$293

Delta flights from Washington, D.C. Reagan-National Airport to Seattle

Our best Delta deals on Washington, D.C. Reagan-National Airport to Seattle flight tickets
Delta
Dec 3
DCA4:25 pmWashington, D.C. Reagan-National
6h 20m
SEA7:45 pmSeattle/Tacoma Intl
Dec 7
SEA7:20 amSeattle/Tacoma Intl
4h 46m
DCA3:06 pmWashington, D.C. Reagan-National
$297
Delta
Dec 3
DCA4:25 pmWashington, D.C. Reagan-National
6h 20m
SEA7:45 pmSeattle/Tacoma Intl
Dec 6
SEA7:20 amSeattle/Tacoma Intl
4h 46m
DCA3:06 pmWashington, D.C. Reagan-National
$307
Delta
Dec 3
DCA4:25 pmWashington, D.C. Reagan-National
6h 20m
SEA7:45 pmSeattle/Tacoma Intl
Dec 9
SEA11:15 pmSeattle/Tacoma Intl
6h 34m
1 stop
DCA8:49 amWashington, D.C. Reagan-National
$308

momondo Fare Finder

 
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

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 12/3

6:00 pm-3:40 pm

1 stop24h 40m

Seattle/Tacoma Intl

Wed 12/9

4:58 pm-4:55 pm

1 stop20h 57m

$289

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 12/3

6:00 pm-3:40 pm

1 stop24h 40m

Seattle/Tacoma Intl

Wed 12/9

4:58 pm-4:55 pm

1 stop20h 57m

$290

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 12/3

5:05 pm-8:22 pm

Nonstop6h 17m

Seattle/Tacoma Intl

Wed 12/9

8:00 am-4:05 pm

Nonstop5h 05m

$291

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Sat 12/12

5:05 pm-8:22 pm

Nonstop6h 17m

Seattle/Tacoma Intl

Mon 12/14

2:02 pm-9:59 pm

Nonstop4h 57m

$297
Quickest round-trip

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Fri 12/11

4:25 pm-7:45 pm

Nonstop6h 20m

Seattle/Tacoma Intl

Thu 12/17

7:20 am-3:06 pm

Nonstop4h 46m

$297

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Fri 12/4

4:25 pm-7:45 pm

Nonstop6h 20m

Seattle/Tacoma Intl

Thu 12/10

7:20 am-3:06 pm

Nonstop4h 46m

$297

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 11/26

7:00 am-3:22 pm

1 stop11h 22m

Seattle/Tacoma Intl

Thu 12/3

2:02 pm-9:59 pm

Nonstop4h 57m

$313

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 11/26

7:00 am-3:22 pm

1 stop11h 22m

Seattle/Tacoma Intl

Sat 12/5

2:02 pm-9:59 pm

Nonstop4h 57m

$313

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Wed 12/2

8:34 am-2:36 pm

1 stop9h 02m

Seattle/Tacoma Intl

Mon 12/7

10:51 am-11:55 pm

1 stop10h 04m

$317

Washington, D.C.Seattle

DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl

DCASEA

Washington, D.C. Reagan-National

Thu 12/3

5:00 am-10:14 am

1 stop8h 14m

Seattle/Tacoma Intl

Sun 12/6

11:39 pm-10:00 am

1 stop7h 21m

$317

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Washington, D.C. Reagan-National Airport to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Washington, D.C. Reagan-National Airport and Seattle?

Prices are currently low for flights on this route.

Typical prices usually range from $353 to $696.
The lowest price recently found on this route was $289.

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Washington, D.C. Reagan-National Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $289. If you don’t want to visit Seattle in February, then you should wait until January to fly from Washington, D.C. Reagan-National Airport, when ticket prices are also cheap, with an average price of $299.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Washington, D.C. Reagan-National Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $469. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Washington, D.C. Reagan-National Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $585.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Washington, D.C. Reagan-National Airport in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $492 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $668. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Washington, D.C. Reagan-National to Seattle/Tacoma Intl flight route?

Fly from Washington, D.C. Reagan-National to Seattle/Tacoma Intl for the best Washington, D.C. Reagan-National - Seattle/Tacoma Intl flight prices

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

You are more likely to see cheaper flights to Seattle from Washington, D.C. Reagan-National Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $477 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Washington, D.C. Reagan-National Airport for as low as $386 on momondo.

What cabin class options are available on Washington, D.C. Reagan-National Airport to Seattle flights?

There are 4 cabin classes available to choose from on Washington, D.C. Reagan-National Airport to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Washington, D.C. Reagan-National Airport to Seattle flight prices changed over time?

As of November 2026, prices for Washington, D.C. Reagan-National Airport to Seattle flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Reagan-National Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Reagan-National Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Reagan-National Airport to Seattle (DCA to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Reagan-National Airport to Seattle

Best Price Found

$199

Fastest flight time

5h 58m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Washington, D.C. Reagan-National Airport in the past 72 hours is $199. The best round-trip flight deal from Washington, D.C. Reagan-National Airport to Seattle found on momondo in the last 72 hours is $289.
The fastest flight from Washington, D.C. Reagan-National Airport to Seattle takes 5h 58m
Direct flights go from Washington, D.C. Reagan-National Airport to Seattle every day.
There is 1 airport in Seattle. From Washington, D.C. Reagan-National Airport there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Washington, D.C. Reagan-National Airport to Seattle

  • How far is Washington, D.C. Reagan-National to Seattle/Tacoma Intl by plane?

    There are 2322.2 mi between Washington, D.C. Reagan-National and Seattle/Tacoma Intl. Typically, this will take 5h 58m by plane in normal conditions.

  • When did momondo last update prices for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Reagan-National Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Washington, D.C. Reagan-National Airport to Seattle?

  • What is the most popular airline from Washington, D.C. Reagan-National Airport to Seattle?

Best airlines flying from Washington, D.C. Reagan-National Airport to Seattle

Compare and see reviews for airlines that fly from Washington, D.C. Reagan-National Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $123Free CancellationRating
5.5
2,512 reviews
Search Frontier flights
DeltaPriceFrom $177Free CancellationRating
7.8
8,700 reviews
Search Delta flights
SouthwestPriceFrom $218Free CancellationRating
8.0
4,211 reviews
Search Southwest flights
American AirlinesPriceFrom $218Free CancellationRating
7.0
12,233 reviews
Search American Airlines flights
United AirlinesPriceFrom $237Free CancellationRating
7.3
10,462 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $252Free CancellationRating
7.9
13,142 reviews
Search Alaska Airlines flights

  • Alaska Airlines Flights From Washington, D.C. Reagan-National Airport to Seattle

    Across 8 Alaska Airlines flights from Washington, D.C. Reagan-National Airport to Seattle this week, the average price was $558, with the best Alaska Airlines deals starting from $252 round-trip. 13,142 users have rated Alaska Airlines on momondo, with an average score of 7.9/10.

  • Delta Flights From Washington, D.C. Reagan-National Airport to Seattle

    The best Delta deal for Washington, D.C. Reagan-National Airport to Seattle flight tickets found on momondo in the last 72 hours was $177, round-trip. It should be noted that an average Delta flight deal for this route in this time was higher, at $450 round-trip. Delta operates 5 flights out of Washington, D.C. Reagan-National Airport into Seattle in an average week, so prices vary by time and availability. 8,698 Delta reviews by users on momondo have scored the airline at 7.8/10.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Kent
Olympia
Federal Way
Redmond
Lakewood
Lynnwood
Fife
Puyallup
Tukwila
Cle Elum
Marysville
Lacey
Kirkland
Centralia
Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Seattle?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Seattle. momondo saves you time and could save you money on your trip.

Can I find flights from Washington, D.C. to Seattle with flexible booking policies on momondo?

Yes. All flights to Seattle from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to Seattle?

Once all potential Washington, D.C. to Seattle flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Washington, D.C. to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Washington, D.C. and alert you when they change.

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