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

32 flights are operational daily from Seattle to District of Columbia as of September 2025. The most popular departure time for this route is 9:00PM, with 42% of flights per day taking off at noon.

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 227 per week as of September 2025. The most frequent departure day is Thu, with 17% of weekly flights leaving on this day.

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

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

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 51% 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.

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 September 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.

$156 Cheap Flights from Seattle to District of Columbia in 2025/26

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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

6:12 am - 12:10 pmSEA-DCA

26h 58m1 stop

7:00 am - 12:30 amDCA-SEA

20h 30m1 stop

$256Frontier

Find Deal

Thu, Oct 2 - Sun, Oct 5

8:00 am - 4:15 pmSEA-DCA

5h 15mnonstop

8:00 am - 10:55 amDCA-SEA

5h 55mnonstop

$257Alaska Airlines

Find Deal

Wed, Jan 7 - Sun, Jan 18

4:48 pm - 12:40 amSEA-IAD

4h 52mnonstop

7:35 am - 10:28 amIAD-SEA

5h 53mnonstop

$259Delta

Find Deal

Fri, Oct 10 - Fri, Oct 17

11:25 pm - 7:33 amSEA-IAD

5h 08mnonstop

6:25 am - 9:08 amIAD-SEA

5h 43mnonstop

$261Hawaiian Airlines

Find Deal

Mon, Oct 6 - Tue, Oct 14

4:48 pm - 12:40 amSEA-IAD

4h 52mnonstop

7:35 am - 10:28 amIAD-SEA

5h 53mnonstop

$262Delta

Find Deal

Wed, Oct 8 - Wed, Oct 15

5:00 am - 4:35 pmSEA-IAD

8h 35m1 stop

5:35 pm - 8:37 pmIAD-SEA

6h 02mnonstop

$263United Airlines

Find Deal

Wed, Jan 7 - Wed, Jan 21

6:55 pm - 5:22 amSEA-IAD

7h 27m1 stop

5:55 pm - 8:44 pmIAD-SEA

5h 49mnonstop

$267United Airlines

Find Deal

Wed, Oct 15 - Wed, Oct 22

9:55 am - 9:10 pmSEA-DCA

8h 15m1 stop

5:30 pm - 8:25 pmDCA-SEA

5h 55mnonstop

$267Hawaiian Airlines

Find Deal

Wed, Jan 7 - Wed, Jan 21

10:30 am - 10:18 pmSEA-IAD

8h 48m1 stop

5:15 pm - 11:09 pmIAD-SEA

8h 54m1 stop

$278American Airlines

Find Deal

Sat, Feb 7 - Wed, Feb 18

10:07 pm - 10:19 amSEA-IAD

9h 12m1 stop

6:24 am - 12:53 pmIAD-SEA

9h 29m1 stop

$319American Airlines

Find Deal

Sun, Nov 2 - Sat, Nov 8

American Airlines flights from Seattle to District of Columbia

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

American Airlines

Feb 7

SEA10:30 amSeattle/Tacoma Intl

8h 48m

1 stop

IAD10:18 pmWashington, D.C. Dulles Intl

Feb 18

IAD5:15 pmWashington, D.C. Dulles Intl

8h 54m

1 stop

SEA11:09 pmSeattle/Tacoma Intl

$278

Find similar

American Airlines

Nov 2

SEA10:07 pmSeattle/Tacoma Intl

9h 12m

1 stop

IAD10:19 amWashington, D.C. Dulles Intl

Nov 8

IAD6:24 amWashington, D.C. Dulles Intl

9h 29m

1 stop

SEA12:53 pmSeattle/Tacoma Intl

$319

Find similar

American Airlines

Nov 7

SEA10:35 amSeattle/Tacoma Intl

8h 58m

1 stop

IAD10:33 pmWashington, D.C. Dulles Intl

Nov 12

IAD2:16 pmWashington, D.C. Dulles Intl

9h 23m

1 stop

SEA8:39 pmSeattle/Tacoma Intl

$322

Find similar

Hawaiian Airlines flights from Seattle to District of Columbia

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

Hawaiian Airlines

Oct 6

SEA11:25 pmSeattle/Tacoma Intl

5h 08m

IAD7:33 amWashington, D.C. Dulles Intl

Oct 14

IAD6:25 amWashington, D.C. Dulles Intl

5h 43m

SEA9:08 amSeattle/Tacoma Intl

$261

Find similar

Hawaiian Airlines

Jan 7

SEA9:55 amSeattle/Tacoma Intl

8h 15m

1 stop

DCA9:10 pmWashington, D.C. Reagan-National

Jan 21

DCA5:30 pmWashington, D.C. Reagan-National

5h 55m

SEA8:25 pmSeattle/Tacoma Intl

$267

Find similar

Hawaiian Airlines

Oct 15

SEA4:20 pmSeattle/Tacoma Intl

5h 03m

IAD12:23 amWashington, D.C. Dulles Intl

Oct 17

IAD7:41 pmWashington, D.C. Dulles Intl

5h 49m

SEA10:30 pmSeattle/Tacoma Intl

$279

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 - DCA

SEADCA

Seattle/Tacoma Intl

Thu 10/2

6:12 am-12:10 pm

1 stop26h 58m

Washington, D.C. Reagan-National

Sun 10/5

7:00 am-12:30 am

1 stop20h 30m

$256

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 1/7

8:00 am-4:15 pm

Nonstop5h 15m

Washington, D.C. Reagan-National

Sun 1/18

8:00 am-10:55 am

Nonstop5h 55m

$257

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Fri 10/10

4:48 pm-12:40 am

Nonstop4h 52m

Washington, D.C. Dulles Intl

Fri 10/17

7:35 am-10:28 am

Nonstop5h 53m

$259

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Mon 10/6

11:25 pm-7:33 am

Nonstop5h 08m

Washington, D.C. Dulles Intl

Tue 10/14

6:25 am-9:08 am

Nonstop5h 43m

$261

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 10/8

4:48 pm-12:40 am

Nonstop4h 52m

Washington, D.C. Dulles Intl

Wed 10/15

7:35 am-10:28 am

Nonstop5h 53m

$262

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 1/7

5:00 am-4:35 pm

1 stop8h 35m

Washington, D.C. Dulles Intl

Wed 1/21

5:35 pm-8:37 pm

Nonstop6h 02m

$263

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 10/15

6:55 pm-5:22 am

1 stop7h 27m

Washington, D.C. Dulles Intl

Wed 10/22

5:55 pm-8:44 pm

Nonstop5h 49m

$267

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 1/7

9:55 am-9:10 pm

1 stop8h 15m

Washington, D.C. Reagan-National

Wed 1/21

5:30 pm-8:25 pm

Nonstop5h 55m

$267

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 2/7

10:30 am-10:18 pm

1 stop8h 48m

Washington, D.C. Dulles Intl

Wed 2/18

5:15 pm-11:09 pm

1 stop8h 54m

$278

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sun 11/2

10:07 pm-10:19 am

1 stop9h 12m

Washington, D.C. Dulles Intl

Sat 11/8

6:24 am-12:53 pm

1 stop9h 29m

$319

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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, August 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 $347. If you don’t want to visit District of Columbia in August, 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 Thursday when prices can be found for as low as $447. 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 $582.

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 $365 when looking at flights departing in the afternoon. Flights to District of Columbia are more costly in the morning, with an average ticket price of $504. Departure times in the morning 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 $398 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 $321 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?

No. A direct flight is the cheapest option for a flight between Seattle to District of Columbia.

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	$186
Fastest flight time	4h 52m
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 $186. The best round-trip flight deal from Seattle to District of Columbia found on momondo in the last 72 hours is $297.

The fastest flight from Seattle to District of Columbia takes 4h 52m

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 September 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 737-800 Passenger/BBJ2 (winglets), making up 25.85% of the total bookings. Other popular models include Boeing 737 MAX 9 with 24.96%, Boeing 737-900 Passenger/BBJ3 (winglets) with 15.14%, and Boeing 737 with 10.35%.

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 $130	Free Cancellation	Rating 5.8 3,171 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $130	Free Cancellation	Rating 6.3 8,030 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $143	Free Cancellation	Rating 7.8 2,732 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $206	Free Cancellation	Rating 7.9 7,964 reviews	Search Delta flights
American Airlines	PriceFrom $206	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $247	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $261	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $268	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines 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 Bostonfrom $73

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Flights to Dallasfrom $56

Flights to Seattlefrom $86

Cheap flights from Seattle to District of Columbia from $156

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 12/5. 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

American Airlines flights from Seattle to District of Columbia

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

Hawaiian Airlines flights from Seattle to District of Columbia

Our best Hawaiian 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?

No. A direct flight is the cheapest option for a flight between Seattle to District of Columbia.

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

Frontier, Sun Country Air, and Hawaiian 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?

32 flights are operational daily from Seattle to District of Columbia as of September 2025. The most popular departure time for this route is 9:00PM, with 42% of flights per day taking off at noon.

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 227 per week as of September 2025. The most frequent departure day is Thu, with 17% 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