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Cheap flights from District of Columbia to Seattle from $135

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Seattle departing on 2/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Frontier Logo
6:00 pm - 12:07 pmDCA-SEA
21h 07m1 stop
Frontier Logo
1:37 pm - 12:04 pmSEA-DCA
19h 27m1 stop
$230Frontier
Find Deal
lun., nov. 3 - mié., nov. 5
Alaska Airlines Logo
6:25 am - 9:08 amIAD-SEA
5h 43mnonstop
Alaska Airlines Logo
4:20 pm - 12:23 amSEA-IAD
5h 03mnonstop
$239Alaska Airlines
Find Deal
vie., oct. 17 - sáb., oct. 18
Frontier Logo
1:00 pm - 7:33 amDCA-SEA
21h 33m1 stop
Frontier Logo
2:31 pm - 4:59 pmSEA-DCA
23h 28m1 stop
$239Frontier
Find Deal
sáb., oct. 11 - lun., oct. 20
Alaska Airlines Logo
6:13 pm - 9:12 pmIAD-SEA
5h 59mnonstop
Alaska Airlines Logo
11:29 pm - 6:23 amSEA-IAD
4h 54mnonstop
$240Alaska Airlines
Find Deal
mar., oct. 28 - sáb., nov. 1
Hawaiian Airlines Logo
6:25 am - 9:08 amIAD-SEA
5h 43mnonstop
Hawaiian Airlines Logo
10:29 pm - 6:23 amSEA-IAD
4h 54mnonstop
$252Hawaiian Airlines
Find Deal
jue., oct. 23 - mié., oct. 29
Delta Logo
7:35 am - 10:28 amIAD-SEA
5h 53mnonstop
Delta Logo
4:48 pm - 12:40 amSEA-IAD
4h 52mnonstop
$257Delta
Find Deal
vie., oct. 24 - sáb., nov. 1
Delta Logo
7:35 am - 10:28 amIAD-SEA
5h 53mnonstop
Delta Logo
4:48 pm - 12:40 amSEA-IAD
4h 52mnonstop
$258Delta
Find Deal
jue., oct. 23 - mié., oct. 29
Hawaiian Airlines Logo
5:51 pm - 11:46 pmIAD-SEA
8h 55m1 stop
Hawaiian Airlines Logo
9:55 pm - 5:55 amSEA-IAD
5h 00mnonstop
$265Hawaiian Airlines
Find Deal
sáb., feb. 14 - sáb., feb. 21
United Airlines Logo
5:55 pm - 8:44 pmIAD-SEA
5h 49mnonstop
United Airlines Logo
5:00 am - 3:25 pmSEA-IAD
7h 25m1 stop
$267United Airlines
Find Deal
vie., oct. 24 - dom., nov. 2
United Airlines Logo
4:08 pm - 11:05 pmIAD-SEA
9h 57m1 stop
United Airlines Logo
7:10 pm - 5:09 amSEA-IAD
6h 59m1 stop
$272United Airlines
Find Deal
mié., feb. 18 - sáb., feb. 21

Delta flights from District of Columbia to Seattle

Our best Delta deals on District of Columbia to Seattle flight tickets
Delta
Oct 24
IAD7:35 amWashington, D.C. Dulles Intl
5h 53m
SEA10:28 amSeattle/Tacoma Intl
Nov 1
SEA4:48 pmSeattle/Tacoma Intl
4h 52m
IAD12:40 amWashington, D.C. Dulles Intl
$257
Find similar
Delta
Oct 23
IAD7:35 amWashington, D.C. Dulles Intl
5h 53m
SEA10:28 amSeattle/Tacoma Intl
Oct 29
SEA4:48 pmSeattle/Tacoma Intl
4h 52m
IAD12:40 amWashington, D.C. Dulles Intl
$258
Find similar
Delta
Oct 31
IAD7:35 amWashington, D.C. Dulles Intl
5h 53m
SEA10:28 amSeattle/Tacoma Intl
Nov 6
SEA4:48 pmSeattle/Tacoma Intl
4h 52m
IAD12:40 amWashington, D.C. Dulles Intl
$282
Find similar

Frontier flights from District of Columbia to Seattle

Our best Frontier deals on District of Columbia to Seattle flight tickets
Frontier
Nov 3
DCA6:00 pmWashington, D.C. Reagan-National
21h 07m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
Nov 5
SEA1:37 pmSeattle/Tacoma Intl
19h 27m
1 stop
DCA12:04 pmWashington, D.C. Reagan-National
$230
Find similar
Frontier
Oct 1
DCA7:00 amWashington, D.C. Reagan-National
18h 59m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
Oct 31
SEA2:22 pmSeattle/Tacoma Intl
28h 37m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
$232
Find similar
Frontier
Oct 7
DCA7:00 amWashington, D.C. Reagan-National
8h 07m
1 stop
SEA12:07 pmSeattle/Tacoma Intl
Oct 15
SEA8:43 pmSeattle/Tacoma Intl
12h 21m
1 stop
DCA12:04 pmWashington, D.C. Reagan-National
$234
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from District of Columbia 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, momondo users made 832,500 searches. Data last updated septiembre 29, 2025.
Use the filters below to find and compare flights from District of Columbia to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

lun. 11/3

6:00 pm-12:07 pm

1 stop21h 07m

Seattle/Tacoma Intl

mié. 11/5

1:37 pm-12:04 pm

1 stop19h 27m

$230

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

vie. 10/17

6:25 am-9:08 am

Nonstop5h 43m

Seattle/Tacoma Intl

sáb. 10/18

4:20 pm-12:23 am

Nonstop5h 03m

$239

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

sáb. 10/11

1:00 pm-7:33 am

1 stop21h 33m

Seattle/Tacoma Intl

lun. 10/20

2:31 pm-4:59 pm

1 stop23h 28m

$239

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

mar. 10/28

6:13 pm-9:12 pm

Nonstop5h 59m

Seattle/Tacoma Intl

sáb. 11/1

11:29 pm-6:23 am

Nonstop4h 54m

$240

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

jue. 10/23

6:25 am-9:08 am

Nonstop5h 43m

Seattle/Tacoma Intl

mié. 10/29

10:29 pm-6:23 am

Nonstop4h 54m

$252

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

vie. 10/24

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

sáb. 11/1

4:48 pm-12:40 am

Nonstop4h 52m

$257

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

jue. 10/23

7:35 am-10:28 am

Nonstop5h 53m

Seattle/Tacoma Intl

mié. 10/29

4:48 pm-12:40 am

Nonstop4h 52m

$258

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

sáb. 2/14

5:51 pm-11:46 pm

1 stop8h 55m

Seattle/Tacoma Intl

sáb. 2/21

9:55 pm-5:55 am

Nonstop5h 00m

$265

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

vie. 10/24

5:55 pm-8:44 pm

Nonstop5h 49m

Seattle/Tacoma Intl

dom. 11/2

5:00 am-3:25 pm

1 stop7h 25m

$267

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

mié. 2/18

4:08 pm-11:05 pm

1 stop9h 57m

Seattle/Tacoma Intl

sáb. 2/21

7:10 pm-5:09 am

1 stop6h 59m

$272

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 District of Columbia 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 cheapest month to fly to Seattle?

In general, September is the cheapest month to fly from District of Columbia to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $368. If you don’t want to visit Seattle in September, then you should wait until October to fly from District of Columbia, when ticket prices are also cheap, with an average price of $376.

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

On average, the least expensive day to fly to Seattle from District of Columbia is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $440. 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 District of Columbia because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $583.

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

Flying to Seattle from District of Columbia in the evening is the least expensive time of day to depart. momondo users have found prices as low as $422 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $520. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest District of Columbia to Seattle/Tacoma Intl flight route?

Fly from Baltimore/Washington to Seattle/Tacoma Intl for the best District of Columbia - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $409 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from District of Columbia for as low as $337 on momondo.

What cabin class options are available on District of Columbia to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on District of Columbia to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on District of Columbia to Seattle flights?

You could potentially save up to 16% on your flight if you consider stops on a District of Columbia to Seattle flight.

Cheap District of Columbia to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Seattle

Best Price Found

$196

Fastest flight time

5h 35m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from District of Columbia in the past 72 hours is $196. The best round-trip flight deal from District of Columbia to Seattle found on momondo in the last 72 hours is $340.
The fastest flight from District of Columbia to Seattle takes 5h 35m
Direct flights go from District of Columbia to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • When did momondo last update prices for flights from District of Columbia to Seattle/Tacoma Intl Airport?

    Prices for flights from District of Columbia to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from District of Columbia to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from District of Columbia to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from District of Columbia to Seattle/Tacoma Intl Airport.

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

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from District of Columbia to Seattle?

Best airlines flying from District of Columbia to Seattle

Compare and see reviews for airlines that fly from District of Columbia to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $111Free CancellationRating
5.8
3,158 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $126Free CancellationRating
6.3
8,050 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $148Free CancellationRating
7.8
2,760 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $181Free CancellationRating
7.9
7,964 reviews
Search Delta flights
American AirlinesPriceFrom $206Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $220Free CancellationRating
8.0
4,246 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $274Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $276Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights
Sun Country AirPriceFrom $313Free CancellationRating
6.9
332 reviews
Search Sun Country Air flights

Traveling to a place near Seattle?

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

Why use momondo?

Why should I use momondo to find a flight deal from District of Columbia to Seattle?

It is quick and easy to find District of Columbia to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.

Can I find flights from District of Columbia to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for District of Columbia to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from District of Columbia to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from District of Columbia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from District of Columbia to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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