How does KAYAK find such low prices on flights from District of Columbia to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to Seattle. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from District of Columbia is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from District of Columbia to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to District of Columbia with another airline. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$129 CHEAP FLIGHTS from District of Columbia to Seattle

SEA

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

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Cheapest round-trip

$216

Overall average: $349

United Airlines

Wed 1/7Sat 1/10

IAD - SEA • Non-stop

Cheapest one-way

$129

Typical prices: $179-$303

Frontier

Thu 1/8

DCA - SEA • 2 stops

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Flight Deals

Cheap Flights from District of Columbia to Seattle

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from District of Columbia to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from District of Columbia to Seattle

Wed, Jan 7 - Sat, Jan 10

5:55 pm - 8:57 pm

IAD

SEA

6h 02mnonstop

8:10 am - 4:16 pm

SEA

IAD

5h 06mnonstop

$216United Airlines

Thu, Feb 5 - Mon, Feb 9

5:55 pm - 8:57 pm

IAD

SEA

6h 02mnonstop

8:10 am - 4:16 pm

SEA

IAD

5h 06mnonstop

$218United Airlines

Thu, Jan 8 - Mon, Jan 12

8:59 am - 5:29 pm

DCA

SEA

11h 30m1 stop

8:50 pm - 5:56 pm

SEA

DCA

18h 06m1 stop

$218Alaska Airlines

Thu, Jan 8 - Wed, Jan 14

12:23 pm - 8:00 pm

IAD

SEA

10h 37m1 stop

1:30 pm - 11:06 pm

SEA

IAD

6h 36m1 stop

$219Delta

Thu, Jan 8 - Tue, Jan 13

9:54 am - 2:21 pm

DCA

SEA

7h 27m1 stop

6:15 am - 6:29 pm

SEA

DCA

9h 14m1 stop

$219Delta

Thu, Jan 15 - Mon, Jan 19

8:00 am - 11:09 am

DCA

SEA

30h 09m1 stop

9:10 pm - 1:02 pm

SEA

DCA

36h 52m2 stops

$222Frontier

Thu, Jan 8 - Wed, Jan 14

5:01 pm - 8:07 pm

DCA

SEA

6h 06mnonstop

1:55 pm - 9:59 pm

SEA

DCA

5h 04mnonstop

$223Alaska Airlines

Sun, Jan 25 - Wed, Feb 25

5:17 pm - 10:43 pm

IAD

SEA

8h 26m1 stop

8:17 am - 4:19 pm

SEA

IAD

5h 02mnonstop

$224United Airlines

Wed, Jan 7 - Mon, Jan 12

6:00 pm - 11:21 am

DCA

SEA

20h 21m1 stop

9:02 pm - 4:59 pm

SEA

DCA

40h 57m2 stops

$225Frontier

Tue, Feb 24 - Sat, Feb 28

9:05 am - 11:05 pm

IAD

SEA

17h 00m2 stops

5:15 am - 3:45 pm

SEA

IAD

7h 30m1 stop

$230Southwest

Useful Info

Low season	January
High season	July
Cheapest flight	$129

Best time to beat the crowds with an average 13% drop in price.

Most popular time to fly with an average 15% increase in price.

Flight from Reagan Washington National Airport to Seattle

ManojFlew with Alaska Airlines

DCA

SEA

Nov 2025

Don’t bring carry on roller luggage if you can avoid it. Overhead space runs out real quick.

Verified travelerFlew with Alaska Airlines

IAD

SEA

Sep 2024

Pay the money if can afford to upgrade your seats

Verified travelerFlew with Alaska Airlines

IAD

SEA

Jul 2024

Dulles, like Seattle has a tram. That can be surprising. The TSA at Seattle is notoriously LONG, however, both times in the last year that I have flown, that has not been the case. At Dulles, the TSA lines were efficient as well. The airport interior is well marked for getting around. I did note that the garbages were full in the Southwest and Alaska areas- as we were there 6 hours and had lots of time to notice nit-picky things that nobody else would care about :). It was convenient to have a "charging station" nearby the Alaska waiting area (right across from our gate). It had 3 ports, and I noticed that as soon as I unplugged mine, it was jumped right on. Suggestion- have Dulles add a few more for passengers who need to recharge phones. Great experience, thank you.

PaulFlew with Alaska Airlines

DCA

SEA

Jun 2024

It's pricier to fly into Reagan (DCA), but if your destination is core DC area, it is well worth it. I used Ubers and Metro; no need to rent a car.

Verified travelerFlew with Alaska Airlines

DCA

SEA

Jul 2024

Be prepared Seattle is a mess as far as the overwhelming crowds when you land . The bus line to get your rental car is unbelievably long almost 100 people so be prepared once you arrive .

Verified travelerFlew with Alaska Airlines

IAD

SEA

May 2024

Get to the airport early, especially on holidays

How does KAYAK find such low prices on flights from District of Columbia to Seattle?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to Seattle.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to Seattle?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from District of Columbia is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from District of Columbia to Seattle?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to District of Columbia with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to Seattle?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Lynnwood

Centralia

Fife

Westport

Lakewood

Mukilteo

Lacey

Poulsbo

Edmonds

Aberdeen

Woodinville

Shoreline

DuPont

Monroe

Castle Rock

Edgewood

Everything you need to know for your flight to Seattle

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Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Seattle

Seattle (SEA)

SEA

$129 Find Cheap Flights from District of Columbia to Seattle

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

Everything you should know

Cheap Flights from District of Columbia to Seattle

Recent round-trip flight deals from District of Columbia to Seattle

Recent one-way flight deals from District of Columbia to Seattle

Recent last minute flight deals from District of Columbia to Seattle

Recent direct flight deals from District of Columbia to Seattle

Good to know

Flights from District of Columbia to Seattle: the best tips from KAYAK users

FAQs for booking flights from District of Columbia to Seattle

How does KAYAK find such low prices on flights from District of Columbia to Seattle?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from District of Columbia to Seattle.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from District of Columbia to Seattle?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from District of Columbia is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from District of Columbia to Seattle?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to District of Columbia with another airline.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from District of Columbia to Seattle?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from District of Columbia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Traveling to a place near Seattle?

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to District of Columbia

Complete your trip to Seattle with a hotel stay or car rental

Find direct flights for Seattle

Flights to other popular destinations

Flights from domestic origins to Seattle

Choose which airport to fly into in Seattle

Find deals for your return flight