What airlines fly to District of Columbia?

Alaska Airlines, Delta and United Airlines are the top three most popular airlines that fly to District of Columbia from Seattle according to our data. Alaska Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to District of Columbia. Keep in mind that there are 8 different airlines that fly to District of Columbia on a routine basis, so you have a few additional options to choose from.

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

33 flights are operational daily from Seattle to District of Columbia as of July 2025. The most popular departure time for this route is 1:00PM, with 37% of flights per day taking off in the evening.

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

Frontier, Hawaiian Airlines, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to District of Columbia

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

The number of flights available between Seattle and District of Columbia is 231 per week as of July 2025. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.

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

Prices for flights from Seattle/Tacoma Intl Airport to District of Columbia refresh daily.

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

There are 7 operators available for flights from Seattle/Tacoma Intl Airport to District of Columbia as of July 2025.

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

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 Seattle/Tacoma Intl Airport to District of Columbia.

What documentation or ID do you need to fly to District of Columbia?

The necessary travel and health documents for your District of Columbia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$118 Cheap Flights from Seattle to District of Columbia in 2025

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Find the cheapest flights from Seattle to District of Columbia

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

4:20 pm - 12:23 amSEA-IAD

5h 03mnonstop

7:00 am - 9:38 amIAD-SEA

5h 38mnonstop

$241Hawaiian Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

6:00 am - 5:01 pmSEA-DCA

8h 01m1 stop

6:00 pm - 11:02 pmDCA-SEA

8h 02m1 stop

$245Frontier

Find Deal

Sat, Oct 11 - Tue, Oct 21

4:20 pm - 12:23 amSEA-IAD

5h 03mnonstop

7:00 am - 9:38 amIAD-SEA

5h 38mnonstop

$251Alaska Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

11:30 pm - 7:33 amSEA-IAD

5h 03mnonstop

6:09 pm - 8:56 pmIAD-SEA

5h 47mnonstop

$252Alaska Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

7:25 am - 3:30 pmSEA-DCA

5h 05mnonstop

4:59 pm - 7:40 pmDCA-SEA

5h 41mnonstop

$257Delta

Find Deal

Sat, Sep 13 - Tue, Sep 16

9:55 pm - 5:55 amSEA-IAD

5h 00mnonstop

7:35 am - 10:16 amIAD-SEA

5h 41mnonstop

$257Delta

Find Deal

Tue, Aug 26 - Tue, Sep 16

10:55 pm - 6:58 amSEA-IAD

5h 03mnonstop

8:20 am - 3:32 pmIAD-SEA

10h 12m1 stop

$267United Airlines

Find Deal

Sat, Sep 20 - Tue, Sep 23

12:34 am - 11:00 amSEA-DCA

7h 26m1 stop

4:38 pm - 10:16 pmDCA-SEA

8h 38m1 stop

$277American Airlines

Find Deal

Tue, Oct 21 - Tue, Oct 28

5:26 am - 4:47 pmSEA-IAD

8h 21m1 stop

2:21 pm - 8:05 pmIAD-SEA

8h 44m1 stop

$305American Airlines

Find Deal

Sat, Sep 13 - Sat, Sep 20

5:02 am - 3:34 pmSEA-IAD

7h 32m1 stop

5:47 pm - 10:59 pmIAD-SEA

8h 12m1 stop

$318United Airlines

Find Deal

Fri, Aug 22 - Wed, Aug 27

Hawaiian Airlines flights from Seattle to District of Columbia

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

Hawaiian Airlines

Sep 13

SEA4:20 pmSeattle/Tacoma Intl

5h 03m

IAD12:23 amWashington, D.C. Dulles Intl

Sep 20

IAD7:00 amWashington, D.C. Dulles Intl

5h 38m

SEA9:38 amSeattle/Tacoma Intl

$241

Find similar

Hawaiian Airlines

Sep 13

SEA7:00 amSeattle/Tacoma Intl

10h 59m

1 stop

DCA8:59 pmWashington, D.C. Reagan-National

Sep 20

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

5h 50m

SEA7:56 pmSeattle/Tacoma Intl

$261

Find similar

Hawaiian Airlines

Aug 30

SEA8:00 amSeattle/Tacoma Intl

9h 59m

1 stop

DCA8:59 pmWashington, D.C. Reagan-National

Sep 6

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

5h 50m

SEA7:56 pmSeattle/Tacoma Intl

$262

Find similar

Alaska Airlines flights from Seattle to District of Columbia

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

Alaska Airlines

Sep 13

SEA4:20 pmSeattle/Tacoma Intl

5h 03m

IAD12:23 amWashington, D.C. Dulles Intl

Sep 20

IAD7:00 amWashington, D.C. Dulles Intl

5h 38m

SEA9:38 amSeattle/Tacoma Intl

$251

Find similar

Alaska Airlines

Sep 13

SEA11:30 pmSeattle/Tacoma Intl

5h 03m

IAD7:33 amWashington, D.C. Dulles Intl

Sep 20

IAD6:09 pmWashington, D.C. Dulles Intl

5h 47m

SEA8:56 pmSeattle/Tacoma Intl

$252

Find similar

Alaska Airlines

Sep 20

SEA11:30 pmSeattle/Tacoma Intl

5h 03m

IAD7:33 amWashington, D.C. Dulles Intl

Sep 21

IAD9:00 amWashington, D.C. Dulles Intl

5h 43m

SEA11:43 amSeattle/Tacoma Intl

$271

Find similar

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 9/13

4:20 pm-12:23 am

Nonstop5h 03m

Washington, D.C. Dulles Intl

Sat 9/20

7:00 am-9:38 am

Nonstop5h 38m

$241

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 10/11

6:00 am-5:01 pm

1 stop8h 01m

Washington, D.C. Reagan-National

Tue 10/21

6:00 pm-11:02 pm

1 stop8h 02m

$245

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 9/13

4:20 pm-12:23 am

Nonstop5h 03m

Washington, D.C. Dulles Intl

Sat 9/20

7:00 am-9:38 am

Nonstop5h 38m

$251

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 9/13

11:30 pm-7:33 am

Nonstop5h 03m

Washington, D.C. Dulles Intl

Sat 9/20

6:09 pm-8:56 pm

Nonstop5h 47m

$252

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 9/13

7:25 am-3:30 pm

Nonstop5h 05m

Washington, D.C. Reagan-National

Tue 9/16

4:59 pm-7:40 pm

Nonstop5h 41m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 8/26

9:55 pm-5:55 am

Nonstop5h 00m

Washington, D.C. Dulles Intl

Tue 9/16

7:35 am-10:16 am

Nonstop5h 41m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 9/20

10:55 pm-6:58 am

Nonstop5h 03m

Washington, D.C. Dulles Intl

Tue 9/23

8:20 am-3:32 pm

1 stop10h 12m

$267

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 10/21

12:34 am-11:00 am

1 stop7h 26m

Washington, D.C. Reagan-National

Tue 10/28

4:38 pm-10:16 pm

1 stop8h 38m

$277

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 9/13

5:26 am-4:47 pm

1 stop8h 21m

Washington, D.C. Dulles Intl

Sat 9/20

2:21 pm-8:05 pm

1 stop8h 44m

$305

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 8/22

5:02 am-3:34 pm

1 stop7h 32m

Washington, D.C. Dulles Intl

Wed 8/27

5:47 pm-10:59 pm

1 stop8h 12m

$318

Flights are sorted by cheapest round-trip flights first.

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

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 District of Columbia?

In general, September is the cheapest month to fly from Seattle to District of Columbia. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $334. If you don’t want to visit District of Columbia in September, then you should wait until March to fly from Seattle, when ticket prices are also cheap, with an average price of $357.

What is the cheapest day to depart on your flight to District of Columbia?

The cheapest day to depart on your flight to District of Columbia is on a Tuesday when prices can be found for as low as $440. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $565.

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

Flying to District of Columbia from Seattle in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $366 when looking at flights departing in the afternoon. Flights to District of Columbia are more costly at noon, with an average ticket price of $504. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

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

How far in advance should I book a flight to District of Columbia?

You are more likely to see cheaper flights to District of Columbia from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to District of Columbia for around $422 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to District of Columbia from Seattle for as low as $323 on momondo.

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to District of Columbia 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 Seattle to District of Columbia flights?

You could potentially save up to 22% on your flight if you consider stops on a Seattle to District of Columbia flight.

Cheap Seattle to District of Columbia flight deals and tips

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

Best Price Found	$118
Fastest flight time	4h 59m
Direct flights	Every day
Airports in District of Columbia	2 airports

The best one-way flight to District of Columbia from Seattle in the past 72 hours is $118. The best round-trip flight deal from Seattle to District of Columbia found on momondo in the last 72 hours is $241.

The fastest flight from Seattle to District of Columbia takes 4h 59m

Direct flights go from Seattle to District of Columbia every day.

There are 2 airports near District of Columbia: Washington, D.C. Reagan-National (DCA), Washington, D.C. Dulles Intl (IAD)

Search flight deals

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to District of Columbia?
Prices for flights from Seattle/Tacoma Intl Airport to District of Columbia refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to District of Columbia?
There are 7 operators available for flights from Seattle/Tacoma Intl Airport to District of Columbia as of July 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to District of Columbia?
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 Seattle/Tacoma Intl Airport to District of Columbia.
What documentation or ID do you need to fly to District of Columbia?
The necessary travel and health documents for your District of Columbia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to District of Columbia?
Based on momondo bookings for flights between Seattle and District of Columbia, the leading plane model is Boeing 737 MAX 9, making up 22.97% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 21.69%, Boeing 737-900 Passenger/BBJ3 (winglets) with 17.00%, and Boeing 737 with 10.21%.

Best airlines flying from Seattle to District of Columbia

Compare and see reviews for airlines that fly from Seattle to District of Columbia with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $128	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
Hawaiian Airlines	PriceFrom $143	Free Cancellation	Rating 7.8 2,611 reviews	Search Hawaiian Airlines flights
Spirit Airlines	PriceFrom $178	Free Cancellation	Rating 6.3 8,049 reviews	Search Spirit Airlines flights
Delta	PriceFrom $204	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
American Airlines	PriceFrom $206	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
United Airlines	PriceFrom $237	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $258	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $286	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights

Why use momondo?

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

Finding the right flight to District of Columbia from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to District of Columbia quick and easy, saving you time and money.

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

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

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

Once you have performed a search for Seattle to District of Columbia flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for Seattle to District of Columbia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your District of Columbia 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.

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Find better results for your trip to District of Columbia

Popular cities in District of Columbia

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Flights to San Franciscofrom $49

Flights to Washington, D.C.from $49

Flights to Bostonfrom $77

Flights to Atlantafrom $29

Flights to Dallasfrom $55

Flights to Seattlefrom $93

Cheap flights from Seattle to District of Columbia from $118

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to District of Columbia departing on 8/30. 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

Filter for what you want

Filter for what you want

Trusted and free

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Price Alerts

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Find the cheapest flights from Seattle to District of Columbia

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Hawaiian Airlines flights from Seattle to District of Columbia

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

Alaska Airlines flights from Seattle to District of Columbia

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

momondo Fare Finder

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

See travel insights to District of Columbia from

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

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 District of Columbia?

What is the cheapest day to depart on your flight to District of Columbia?

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

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

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

How far in advance should I book a flight to District of Columbia?

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

There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to District of Columbia 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 Seattle to District of Columbia flights?

You could potentially save up to 22% on your flight if you consider stops on a Seattle to District of Columbia flight.

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

Frontier, Hawaiian Airlines, and American Airlines are the most popular carriers operating from Seattle/Tacoma Intl to District of Columbia

What airlines fly to District of Columbia?

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

33 flights are operational daily from Seattle to District of Columbia as of July 2025. The most popular departure time for this route is 1:00PM, with 37% of flights per day taking off in the evening.

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

The number of flights available between Seattle and District of Columbia is 231 per week as of July 2025. The most frequent departure day is Thu, with 18% of weekly flights leaving on this day.

Cheap Seattle to District of Columbia flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in District of Columbia

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

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

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

What documentation or ID do you need to fly to District of Columbia?

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

Best airlines flying from Seattle to District of Columbia

Compare and see reviews for airlines that fly from Seattle to District of Columbia with momondo

Why use momondo?

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

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

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

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

An easier way to manage your District of Columbia 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 District of Columbia

Popular cities in District of Columbia

Popular flights according to clicks in the last 7 days on momondo