What airlines fly to Seattle?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Seattle from District of Columbia according to our data. Alaska Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 9 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

How many flights depart from District of Columbia to Seattle on average per day?

As of December 2025, 25 flights take off from District of Columbia and land in Seattle each day. The most common flight departure time for this route is 5:00PM, with 47% of daily flights taking off at noon.

What is the cheapest airline that flies from District of Columbia to Seattle/Tacoma Intl?

United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from District of Columbia to Seattle/Tacoma Intl

How many flights depart from District of Columbia to Seattle on average per week?

179 flights are operational weekly from District of Columbia to Seattle as of December 2025. The most popular departure day for this route is Sat, with 17% of flights per week taking off on this day.

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?

The number of operators available for flights from District of Columbia to Seattle/Tacoma Intl Airport is 7 as of December 2025.

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.

$120 Cheap Flights from District of Columbia to Seattle in 2025/26

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Last minute

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Cheap round-trip flights

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6:04 pm - 9:08 pm

IAD

SEA

6h 04mnonstop

8:30 am - 4:26 pm

SEA

IAD

4h 56mnonstop

$199Alaska Airlines

Sat, Jan 17 - Thu, Jan 22

5:01 pm - 8:07 pm

DCA

SEA

6h 06mnonstop

8:00 am - 4:09 pm

SEA

DCA

5h 09mnonstop

$199Alaska Airlines

Sat, Jan 17 - Sun, Jan 18

5:00 pm - 8:11 pm

DCA

SEA

6h 11mnonstop

1:16 pm - 1:15 pm

SEA

DCA

20h 59m1 stop

$200Multiple Airlines

Sat, Feb 14 - Sat, Feb 21

8:59 am - 11:19 am

DCA

SEA

29h 20m1 stop

12:34 pm - 1:02 pm

SEA

DCA

21h 28m1 stop

$201Frontier

Wed, Jan 21 - Sun, Jan 25

6:00 pm - 11:09 am

DCA

SEA

20h 09m1 stop

12:54 pm - 1:02 pm

SEA

DCA

21h 08m2 stops

$202Frontier

Sat, Jan 17 - Sat, Jan 24

5:06 pm - 10:18 pm

DCA

SEA

8h 12m1 stop

7:10 am - 9:02 pm

SEA

DCA

10h 52m1 stop

$203Hawaiian Airlines

Sat, Feb 14 - Sat, Feb 21

5:17 pm - 10:43 pm

IAD

SEA

8h 26m1 stop

8:10 am - 4:16 pm

SEA

IAD

5h 06mnonstop

$205United Airlines

Fri, Jan 23 - Sun, Jan 25

2:00 pm - 11:09 am

DCA

SEA

24h 09m1 stop

6:00 am - 5:56 pm

SEA

DCA

8h 56m1 stop

$206Multiple Airlines

Sat, Jan 17 - Sat, Jan 24

7:05 am - 10:05 am

IAD

SEA

6h 00mnonstop

9:45 pm - 5:40 am

SEA

IAD

4h 55mnonstop

$207Hawaiian Airlines

Sat, Feb 14 - Sun, Feb 22

5:55 pm - 8:57 pm

IAD

SEA

6h 02mnonstop

8:10 am - 4:16 pm

SEA

IAD

5h 06mnonstop

$213United Airlines

Sat, Jan 31 - Mon, Feb 9

Hawaiian Airlines flights from District of Columbia to Seattle

Our best Hawaiian Airlines deals on District of Columbia to Seattle flight tickets

Hawaiian Airlines

Feb 14

DCA5:06 pmWashington, D.C. Reagan-National

8h 12m

1 stop

SEA10:18 pmSeattle/Tacoma Intl

Feb 21

SEA7:10 amSeattle/Tacoma Intl

10h 52m

1 stop

DCA9:02 pmWashington, D.C. Reagan-National

$203

Find similar

Hawaiian Airlines

Feb 14

IAD7:05 amWashington, D.C. Dulles Intl

6h 00m

SEA10:05 amSeattle/Tacoma Intl

Feb 22

SEA9:45 pmSeattle/Tacoma Intl

4h 55m

IAD5:40 amWashington, D.C. Dulles Intl

$207

Find similar

Hawaiian Airlines

Feb 14

IAD7:05 amWashington, D.C. Dulles Intl

6h 00m

SEA10:05 amSeattle/Tacoma Intl

Feb 22

SEA9:45 pmSeattle/Tacoma Intl

4h 55m

IAD5:40 amWashington, D.C. Dulles Intl

$258

Find similar

United Airlines flights from District of Columbia to Seattle

Our best United Airlines deals on District of Columbia to Seattle flight tickets

United Airlines

Jan 23

IAD5:17 pmWashington, D.C. Dulles Intl

8h 26m

1 stop

SEA10:43 pmSeattle/Tacoma Intl

Jan 28

SEA8:10 amSeattle/Tacoma Intl

5h 06m

IAD4:16 pmWashington, D.C. Dulles Intl

$205

Find similar

United Airlines

Jan 31

IAD5:55 pmWashington, D.C. Dulles Intl

6h 02m

SEA8:57 pmSeattle/Tacoma Intl

Feb 9

SEA8:10 amSeattle/Tacoma Intl

5h 06m

IAD4:16 pmWashington, D.C. Dulles Intl

$213

Find similar

United Airlines

Jan 16

IAD5:55 pmWashington, D.C. Dulles Intl

6h 02m

SEA8:57 pmSeattle/Tacoma Intl

Jan 20

SEA8:10 amSeattle/Tacoma Intl

5h 06m

IAD4:16 pmWashington, D.C. Dulles Intl

$215

Find similar

momondo Fare Finder

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

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 1/17

6:04 pm-9:08 pm

Nonstop6h 04m

Seattle/Tacoma Intl

Thu 1/22

8:30 am-4:26 pm

Nonstop4h 56m

$199

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 1/17

5:01 pm-8:07 pm

Nonstop6h 06m

Seattle/Tacoma Intl

Sun 1/18

8:00 am-4:09 pm

Nonstop5h 09m

$199

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 2/14

5:00 pm-8:11 pm

Nonstop6h 11m

Seattle/Tacoma Intl

Sat 2/21

1:16 pm-1:15 pm

1 stop20h 59m

$200

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 1/21

8:59 am-11:19 am

1 stop29h 20m

Seattle/Tacoma Intl

Sun 1/25

12:34 pm-1:02 pm

1 stop21h 28m

$201

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 1/17

6:00 pm-11:09 am

1 stop20h 09m

Seattle/Tacoma Intl

Sat 1/24

12:54 pm-1:02 pm

2 stops21h 08m

$202

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 2/14

5:06 pm-10:18 pm

1 stop8h 12m

Seattle/Tacoma Intl

Sat 2/21

7:10 am-9:02 pm

1 stop10h 52m

$203

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 1/23

5:17 pm-10:43 pm

1 stop8h 26m

Seattle/Tacoma Intl

Sun 1/25

8:10 am-4:16 pm

Nonstop5h 06m

$205

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 1/17

2:00 pm-11:09 am

1 stop24h 09m

Seattle/Tacoma Intl

Sat 1/24

6:00 am-5:56 pm

1 stop8h 56m

$206

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 2/14

7:05 am-10:05 am

Nonstop6h 00m

Seattle/Tacoma Intl

Sun 2/22

9:45 pm-5:40 am

Nonstop4h 55m

$207

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 1/31

5:55 pm-8:57 pm

Nonstop6h 02m

Seattle/Tacoma Intl

Mon 2/9

8:10 am-4:16 pm

Nonstop5h 06m

$213

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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

Prices

Airlines

Other information

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 $329. If you don’t want to visit Seattle in September, then you should wait until February to fly from District of Columbia, when ticket prices are also cheap, with an average price of $362.

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 $436. 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 $581.

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 $425 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $512. 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 Washington, D.C. Dulles Intl 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 $401 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 $321 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 4% 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	$185
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 $185. The best round-trip flight deal from District of Columbia to Seattle found on momondo in the last 72 hours is $277.

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 in Seattle. From District of Columbia there are direct flights to 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?
The number of operators available for flights from District of Columbia to Seattle/Tacoma Intl Airport is 7 as of December 2025.
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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from District of Columbia to Seattle is Boeing 737-800 Passenger/BBJ2 (winglets) (22.30% of total bookings). The next most popular plane models are Boeing 737 (17.38%), Boeing 737 MAX 9 (13.29%), and Boeing 737 MAX 8 (11.28%).

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
Frontier	PriceFrom $111	Free Cancellation	Rating 5.8 3,070 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $125	Free Cancellation	Rating 6.3 8,212 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $149	Free Cancellation	Rating 7.8 2,819 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $176	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights
American Airlines	PriceFrom $197	Free Cancellation	Rating 7.2 11,069 reviews	Search American Airlines flights
Southwest	PriceFrom $236	Free Cancellation	Rating 8.0 4,256 reviews	Search Southwest flights
United Airlines	PriceFrom $238	Free Cancellation	Rating 7.4 9,116 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $258	Free Cancellation	Rating 8.0 11,549 reviews	Search Alaska Airlines flights
Sun Country Air	PriceFrom $313	Free Cancellation	Rating 6.9 335 reviews	Search Sun Country Air flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Federal Way

Cle Elum

Lakewood

Fife

Centralia

Westport

Kirkland

Shoreline

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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Cheap flights from District of Columbia to Seattle from $120

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 1/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

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Filter for what you want

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Find the cheapest flights from District of Columbia to Seattle

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Cheap last minute flights

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Hawaiian Airlines flights from District of Columbia to Seattle

Our best Hawaiian Airlines deals on District of Columbia to Seattle flight tickets

United Airlines flights from District of Columbia to Seattle

Our best United Airlines deals on District of Columbia to Seattle flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from District of Columbia to Seattle that are best for you.

See travel insights to Seattle from

How to get the cheapest flight ticket from District of Columbia to Seattle

What is the cheapest month to fly to Seattle?

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

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

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

Fly from Washington, D.C. Dulles Intl 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?

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 4% on your flight if you consider stops on a District of Columbia to Seattle flight.

What is the cheapest airline that flies from District of Columbia to Seattle/Tacoma Intl?

United Airlines, Delta, and Alaska Airlines are the most popular carriers operating from District of Columbia to Seattle/Tacoma Intl

What airlines fly to Seattle?

How many flights depart from District of Columbia to Seattle on average per day?

As of December 2025, 25 flights take off from District of Columbia and land in Seattle each day. The most common flight departure time for this route is 5:00PM, with 47% of daily flights taking off at noon.

How many flights depart from District of Columbia to Seattle on average per week?

179 flights are operational weekly from District of Columbia to Seattle as of December 2025. The most popular departure day for this route is Sat, with 17% of flights per week taking off on this day.

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

Fastest flight time

Direct flights

Airports in Seattle

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

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?

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

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

Traveling to a place near Seattle?

Why use momondo?

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

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

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

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

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Washington