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.

$204 CHEAP FLIGHTS from District of Columbia to Seattle

Save 19% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheap Flights from District of Columbia to Seattle

Cheap flights from District of Columbia to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Sat, Jan 23 - Tue, Jan 26

3:15 pm - 9:59 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

9h 44m1 stop Los Angeles

8:30 am - 7:31 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 01m1 stop Denver Intl

$292United Airlines

Sat, Jan 9 - Mon, Jan 11

3:15 pm - 9:59 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

9h 44m1 stop Los Angeles

8:30 am - 7:31 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 01m1 stop Denver Intl

$292United Airlines

Wed, Oct 28 - Sun, Nov 1

12:31 pm - 9:45 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

24h 14m2 stops Dallas/Fort Worth Las Vegas Harry Reid Intl

10:50 am - 11:36 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

21h 46m2 stops Ontario Dallas/Fort Worth

$293Frontier

Thu, Nov 12 - Wed, Nov 18

6:00 pm - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

24h 12m1 stop Denver Intl

4:27 pm - 12:09 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

16h 42m1 stop Denver Intl

$293Frontier

Wed, Jan 6 - Sun, Jan 10

7:00 am - 1:25 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

9h 25m1 stop Dallas/Fort Worth

5:11 am - 4:17 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 06m1 stop Dallas/Fort Worth

$297American Airlines

Tue, Nov 3 - Tue, Nov 10

3:55 pm - 10:34 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

9h 39m1 stop Charlotte Douglas

12:38 pm - 10:59 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

7h 21m1 stop Charlotte Douglas

$297American Airlines

Fri, Jan 15 - Mon, Jan 18

11:05 am - 6:38 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

10h 33m1 stop Detroit Metropolitan Wayne County

11:05 pm - 10:13 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 08m1 stop Detroit Metropolitan Wayne County

$297Delta

Thu, Nov 5 - Sun, Nov 8

6:05 am - 10:40 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

7h 35m1 stop Detroit Metropolitan Wayne County

11:50 pm - 11:18 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 28m1 stop Minneapolis St Paul

$297Delta

Fri, Feb 5 - Mon, Feb 8

4:55 pm - 12:20 amDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

10h 25m1 stop Las Vegas Harry Reid Intl

5:30 am - 4:55 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

8h 25m1 stop Chicago Midway

$297Southwest

Sat, Nov 21 - Fri, Nov 27

6:40 pm - 12:45 amDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

9h 05m1 stop Chicago Midway

5:30 am - 3:15 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

6h 45m1 stop Chicago Midway

$297Southwest

Thu, Oct 15 - Mon, Nov 9

6:00 am - 9:48 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

30h 48m1 stop Las Vegas Harry Reid Intl

9:13 pm - 11:43 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

23h 30m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

$399Frontier

Sat, Oct 10 - Tue, Oct 13

8:00 am - 10:59 amDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 59mnonstop

8:00 am - 4:25 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 25mnonstop

$422Alaska Airlines

Thu, Oct 15 - Sun, Nov 8

6:00 am - 9:48 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

30h 48m1 stop Las Vegas Harry Reid Intl

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$439Multiple Airlines

Thu, Oct 15 - Mon, Nov 9

6:00 am - 9:48 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

30h 48m1 stop Las Vegas Harry Reid Intl

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$439Multiple Airlines

Thu, Oct 15 - Mon, Nov 9

6:00 pm - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

24h 12m1 stop Denver Intl

9:13 pm - 9:50 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

21h 37m2 stops Las Vegas Harry Reid Intl Denver Intl

$444Frontier

Thu, Oct 15 - Mon, Nov 9

9:38 am - 12:20 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 42mnonstop

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$622Alaska Airlines

Thu, Oct 15 - Sat, Oct 17

5:01 am - 12:18 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

10h 17m1 stop Charlotte Douglas

9:42 pm - 8:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 02m1 stop Charlotte Douglas

$710American Airlines

Thu, Oct 15 - Sat, Oct 17

7:05 am - 9:56 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 51mnonstop

11:58 am - 8:06 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 08mnonstop

$716Delta

Thu, Oct 15 - Sat, Oct 17

3:03 pm - 10:03 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

10h 00m1 stop Atlanta Hartsfield-Jackson

11:58 am - 8:06 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 08mnonstop

$726Delta

Sat, Oct 10 - Mon, Nov 2

3:08 pm - 12:10 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

12h 02m1 stop Dallas/Fort Worth

5:10 am - 6:19 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

10h 09m1 stop Dallas/Fort Worth

$814American Airlines

Sat, Dec 19 - Sun, Jan 3

7:00 am - 10:05 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 05mnonstop

3:53 pm - 11:53 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 00mnonstop

$297Delta

Fri, Dec 18 - Sun, Dec 27

4:25 pm - 7:45 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

6h 20mnonstop

7:55 am - 3:40 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

4h 45mnonstop

$297Delta

Thu, Dec 24 - Sun, Dec 27

4:50 pm - 8:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

6h 22mnonstop

7:55 am - 3:40 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

4h 45mnonstop

$297Delta

Mon, Nov 23 - Fri, Nov 27

7:00 am - 9:50 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 50mnonstop

8:15 am - 4:13 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 58mnonstop

$307Alaska Airlines

Fri, Nov 6 - Sun, Nov 8

5:17 pm - 8:13 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 56mnonstop

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$307Alaska Airlines

Mon, Nov 9 - Thu, Nov 12

5:50 pm - 8:56 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 06mnonstop

8:09 am - 4:08 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 59mnonstop

$317United Airlines

Mon, Mar 1 - Thu, Mar 4

5:35 pm - 8:40 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 05mnonstop

8:00 am - 3:53 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 53mnonstop

$317United Airlines

Sat, Nov 7 - Mon, Nov 9

7:46 am - 10:36 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 50mnonstop

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$387American Airlines

Sat, Nov 7 - Sun, Nov 8

5:17 pm - 8:13 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

5h 56mnonstop

9:49 pm - 5:44 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$387American Airlines

Wed, Nov 25 - Sun, Nov 29

7:00 am - 10:05 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 05mnonstop

9:45 pm - 5:40 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$609Multiple Airlines

Low season	January
High season	July
Cheapest flight	$204

Best time to beat the crowds with an average 26% drop in price.

Most popular time to fly with an average 23% increase in price.

Flight from Washington Dulles Airport to Seattle

ZacharyFlew with Alaska Airlines-Sep 2026

Loud boarding area, congested, try to get close to podium otherwise impossible to tell what boarding group is being called

Verified travelerFlew with Alaska Airlines-Jun 2026

If you have a layover in Washington DC, check out any of the Smithsonian museums which are free.

NguyenFlew with Delta-Dec 2025

DCA airport is much easier to navigate (security, getting to gate, proximity to DC city center) than IAD

ManojFlew with Alaska Airlines-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-Sep 2024

Pay the money if can afford to upgrade your seats

Verified travelerFlew with Alaska Airlines-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-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-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-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

Lakewood

Westport

Lacey

Mukilteo

Woodinville

Poulsbo

Edmonds

Aberdeen

DuPont

Shoreline

Monroe

Castle Rock

Edgewood

More options for your flight to Seattle

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other destinations

Return flight

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

Car rentals in Seattle

SEA

$204 Find Cheap Flights from District of Columbia to Seattle - Compare and Save

Cheap Flights from District of Columbia to Seattle

Cheap flights from District of Columbia to Seattle with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Good to know

Low season

High season

Cheapest flight

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

FAQs for booking flights from District of Columbia to Seattle

Traveling to a place near Seattle?

More options for your flight to Seattle

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

Information on the airport you'll fly into in Seattle

Cabin class types available on flights to District of Columbia

Find direct flights for Seattle

Flights from domestic origins to Seattle

Flights to other popular destinations

Find deals for your return flight