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

As of November 2025, 26 flights take off from District of Columbia and land in Seattle each day. The most common flight departure time for this route is 7:00AM, with 47% of daily flights taking off at noon.

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

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

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.

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

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

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 November 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.

$134 Cheap Flights from District of Columbia to Seattle in 2025/26

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:04 pm - 9:08 pmIAD-SEA

6h 04mnonstop

8:30 am - 4:26 pmSEA-IAD

4h 56mnonstop

$236Alaska Airlines

Find Deal

Thu, Feb 5 - Mon, Feb 9

5:08 pm - 10:45 pmDCA-SEA

8h 37m1 stop

7:05 am - 8:00 pmSEA-DCA

9h 55m1 stop

$237Alaska Airlines

Find Deal

Mon, Dec 8 - Tue, Dec 9

7:34 am - 10:35 amIAD-SEA

6h 01mnonstop

10:11 pm - 6:06 amSEA-IAD

4h 55mnonstop

$238Alaska Airlines

Find Deal

Fri, Dec 5 - Mon, Dec 15

7:15 am - 10:12 amIAD-SEA

5h 57mnonstop

3:30 pm - 11:27 pmSEA-IAD

4h 57mnonstop

$239Delta

Find Deal

Mon, Dec 8 - Thu, Dec 11

4:55 pm - 7:48 pmDCA-SEA

5h 53mnonstop

7:25 am - 3:27 pmSEA-DCA

5h 02mnonstop

$239Delta

Find Deal

Wed, Dec 3 - Fri, Dec 5

5:55 pm - 8:54 pmIAD-SEA

5h 59mnonstop

8:10 am - 4:18 pmSEA-IAD

5h 08mnonstop

$240United Airlines

Find Deal

Sat, Dec 6 - Sat, Dec 13

5:55 pm - 8:57 pmIAD-SEA

6h 02mnonstop

8:10 am - 4:16 pmSEA-IAD

5h 06mnonstop

$241United Airlines

Find Deal

Thu, Feb 5 - Mon, Feb 9

6:00 pm - 11:53 amDCA-SEA

20h 53m1 stop

10:51 am - 1:06 pmSEA-DCA

23h 15m2 stops

$241Frontier

Find Deal

Thu, Dec 11 - Sun, Dec 14

7:15 am - 10:12 amIAD-SEA

5h 57mnonstop

3:30 pm - 11:27 pmSEA-IAD

4h 57mnonstop

$243Delta

Find Deal

Wed, Dec 3 - Sat, Dec 6

2:00 pm - 1:30 pmDCA-SEA

26h 30m2 stops

3:40 pm - 1:06 pmSEA-DCA

18h 26m1 stop

$246Frontier

Find Deal

Thu, Dec 11 - Mon, Dec 15

United Airlines flights from District of Columbia to Seattle

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

United Airlines

Dec 6

IAD5:55 pmWashington, D.C. Dulles Intl

5h 59m

SEA8:54 pmSeattle/Tacoma Intl

Dec 13

SEA8:10 amSeattle/Tacoma Intl

5h 08m

IAD4:18 pmWashington, D.C. Dulles Intl

$240

Find similar

United Airlines

Feb 8

IAD5:17 pmWashington, D.C. Dulles Intl

8h 26m

1 stop

SEA10:43 pmSeattle/Tacoma Intl

Feb 11

SEA8:10 amSeattle/Tacoma Intl

5h 06m

IAD4:16 pmWashington, D.C. Dulles Intl

$245

Find similar

United Airlines

Feb 26

IAD1:02 pmWashington, D.C. Dulles Intl

9h 01m

1 stop

SEA7:03 pmSeattle/Tacoma Intl

Mar 1

SEA12:18 pmSeattle/Tacoma Intl

8h 03m

1 stop

IAD11:21 pmWashington, D.C. Dulles Intl

$246

Find similar

Frontier flights from District of Columbia to Seattle

Our best Frontier deals on District of Columbia to Seattle flight tickets

Frontier

Dec 11

DCA6:00 pmWashington, D.C. Reagan-National

20h 53m

1 stop

SEA11:53 amSeattle/Tacoma Intl

Dec 14

SEA10:51 amSeattle/Tacoma Intl

23h 15m

2 stops

DCA1:06 pmWashington, D.C. Reagan-National

$241

Find similar

Frontier

Nov 20

DCA8:00 amWashington, D.C. Reagan-National

30h 56m

1 stop

SEA11:56 amSeattle/Tacoma Intl

Nov 24

SEA1:01 pmSeattle/Tacoma Intl

21h 02m

1 stop

DCA1:03 pmWashington, D.C. Reagan-National

$243

Find similar

Frontier

Dec 11

DCA2:00 pmWashington, D.C. Reagan-National

26h 30m

2 stops

SEA1:30 pmSeattle/Tacoma Intl

Dec 15

SEA3:40 pmSeattle/Tacoma Intl

18h 26m

1 stop

DCA1:06 pmWashington, D.C. Reagan-National

$246

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

Thu 2/5

6:04 pm-9:08 pm

Nonstop6h 04m

Seattle/Tacoma Intl

Mon 2/9

8:30 am-4:26 pm

Nonstop4h 56m

$236

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Mon 12/8

5:08 pm-10:45 pm

1 stop8h 37m

Seattle/Tacoma Intl

Tue 12/9

7:05 am-8:00 pm

1 stop9h 55m

$237

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Fri 12/5

7:34 am-10:35 am

Nonstop6h 01m

Seattle/Tacoma Intl

Mon 12/15

10:11 pm-6:06 am

Nonstop4h 55m

$238

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Mon 12/8

7:15 am-10:12 am

Nonstop5h 57m

Seattle/Tacoma Intl

Thu 12/11

3:30 pm-11:27 pm

Nonstop4h 57m

$239

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 12/3

4:55 pm-7:48 pm

Nonstop5h 53m

Seattle/Tacoma Intl

Fri 12/5

7:25 am-3:27 pm

Nonstop5h 02m

$239

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 12/6

5:55 pm-8:54 pm

Nonstop5h 59m

Seattle/Tacoma Intl

Sat 12/13

8:10 am-4:18 pm

Nonstop5h 08m

$240

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Thu 2/5

5:55 pm-8:57 pm

Nonstop6h 02m

Seattle/Tacoma Intl

Mon 2/9

8:10 am-4:16 pm

Nonstop5h 06m

$241

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 12/11

6:00 pm-11:53 am

1 stop20h 53m

Seattle/Tacoma Intl

Sun 12/14

10:51 am-1:06 pm

2 stops23h 15m

$241

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Wed 12/3

7:15 am-10:12 am

Nonstop5h 57m

Seattle/Tacoma Intl

Sat 12/6

3:30 pm-11:27 pm

Nonstop4h 57m

$243

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Thu 12/11

2:00 pm-1:30 pm

2 stops26h 30m

Seattle/Tacoma Intl

Mon 12/15

3:40 pm-1:06 pm

1 stop18h 26m

$246

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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 $334. 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 $368.

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 $438. 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 $579.

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 $522. 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. Reagan-National 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 $412 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 $340 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.

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	$179
Fastest flight time	5h 47m
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 $179. The best round-trip flight deal from District of Columbia to Seattle found on momondo in the last 72 hours is $352.

The fastest flight from District of Columbia to Seattle takes 5h 47m

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?
The number of operators available for flights from District of Columbia to Seattle/Tacoma Intl Airport is 7 as of November 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) (25.68% of total bookings). The next most popular plane models are Boeing 737 MAX 9 (22.55%), Boeing 737 (13.24%), and Boeing 737-900 Passenger/BBJ3 (winglets) (11.60%).

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 3,110 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $126	Free Cancellation	Rating 6.3 8,139 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $149	Free Cancellation	Rating 7.8 2,809 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $184	Free Cancellation	Rating 7.9 8,008 reviews	Search Delta flights
American Airlines	PriceFrom $206	Free Cancellation	Rating 7.2 11,051 reviews	Search American Airlines flights
United Airlines	PriceFrom $229	Free Cancellation	Rating 7.4 9,017 reviews	Search United Airlines flights
Southwest	PriceFrom $238	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $275	Free Cancellation	Rating 8.0 11,286 reviews	Search Alaska Airlines flights
Sun Country Air	PriceFrom $313	Free Cancellation	Rating 6.9 336 reviews	Search Sun Country Air flights

Tacoma

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SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Redmond

Tukwila

Lakewood

Federal Way

Fife

Cle Elum

Centralia

Kirkland

Westport

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 $138

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 1/15. 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

Cheap round-trip flights

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United Airlines flights from District of Columbia to Seattle

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

Frontier flights from District of Columbia to Seattle

Our best Frontier deals on District of Columbia to Seattle flight tickets

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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

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?

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. Reagan-National 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.

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

Frontier, Alaska Airlines, and Hawaiian 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 November 2025, 26 flights take off from District of Columbia and land in Seattle each day. The most common flight departure time for this route is 7:00AM, with 47% of daily flights taking off at noon.

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

182 flights are operational weekly from District of Columbia to Seattle as of November 2025. The most popular departure day for this route is Thu, 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.

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Airports servicing Washington