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.

$199 CHEAP FLIGHTS from District of Columbia to Seattle

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Cheap Flights from District of Columbia to Seattle

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

Thu, Dec 3 - Wed, Dec 9

6:00 pm - 3:40 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

24h 40m1 stop Denver Intl

4:58 pm - 4:55 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

20h 57m1 stop Denver Intl

$289Frontier

Thu, Dec 3 - Wed, Dec 9

6:00 pm - 3:40 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

24h 40m1 stop Denver Intl

4:58 pm - 4:55 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

20h 57m1 stop Denver Intl

$290Frontier

Fri, Dec 4 - Tue, Dec 8

5:18 pm - 8:27 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 09mnonstop

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

5h 00mnonstop

$291Alaska Airlines

Thu, Dec 3 - Wed, Dec 9

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

6h 05mnonstop

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

5h 00mnonstop

$291Alaska Airlines

Sat, Dec 12 - Mon, Dec 14

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

6h 10mnonstop

4:30 pm - 12:31 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 01mnonstop

$297Delta

Thu, Dec 3 - Wed, Dec 9

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

6h 10mnonstop

4:30 pm - 12:31 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 01mnonstop

$297Delta

Sat, Dec 5 - Tue, Dec 8

5:55 pm - 9:01 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

$297United Airlines

Thu, Dec 3 - Wed, Dec 9

5:55 pm - 9:01 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

$297United Airlines

Wed, Dec 16 - Mon, Dec 21

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

6h 05mnonstop

6:25 pm - 6:07 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

8h 42m1 stop Las Vegas Harry Reid Intl

$313Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

7:00 am - 3:22 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

11h 22m1 stop Denver Intl

2:02 pm - 9:59 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

4h 57mnonstop

$313Multiple Airlines

Recent last minute flight deals from District of Columbia to Seattle

Sat, Nov 7 - Sun, Nov 22

7:00 am - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

11h 12m1 stop Denver Intl

4:37 pm - 12:59 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

17h 22m1 stop Denver Intl

$405Frontier

Sat, Nov 7 - Sat, Nov 14

7:00 am - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

11h 12m1 stop Denver Intl

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

16h 42m1 stop Denver Intl

$406Frontier

Fri, Nov 6 - Mon, Nov 23

1:00 pm - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

29h 12m1 stop Denver Intl

8:00 am - 4:04 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 04mnonstop

$534Multiple Airlines

Fri, Nov 6 - Mon, Nov 9

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

$542Alaska Airlines

Fri, Nov 6 - Mon, Nov 9

6:46 pm - 9:27 amIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

17h 41m1 stop San Diego

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

4h 55mnonstop

$549Alaska Airlines

Sat, Nov 7 - Sun, Nov 15

7:00 am - 3:12 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

11h 12m1 stop Denver Intl

6:50 pm - 4:47 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

18h 57m2 stops Minneapolis St Paul Denver Intl

$555Multiple Airlines

Sat, Nov 7 - Tue, Nov 24

4:45 pm - 7:35 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 50mnonstop

7:20 am - 3:13 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

4h 53mnonstop

$712Delta

Fri, Nov 6 - Tue, Nov 24

4:45 pm - 7:35 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

5h 50mnonstop

7:20 am - 3:13 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

4h 53mnonstop

$712Delta

Fri, Nov 6 - Mon, Nov 23

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

$712United Airlines

Tue, Nov 10 - Thu, Nov 19

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

$787United Airlines

Recent direct flight deals from District of Columbia to Seattle

Fri, Dec 4 - Tue, Dec 8

5:18 pm - 8:27 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 09mnonstop

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

5h 00mnonstop

$291Alaska Airlines

Thu, Dec 3 - Wed, Dec 9

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

6h 05mnonstop

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

5h 00mnonstop

$291Alaska Airlines

Thu, Dec 3 - Wed, Dec 9

5:05 pm - 8:22 pmDCA Washington, D.C. Reagan-National-SEA Seattle/Tacoma Intl

6h 17mnonstop

8:00 am - 4:05 pmSEA Seattle/Tacoma Intl-DCA Washington, D.C. Reagan-National

5h 05mnonstop

$291Alaska Airlines

Sat, Dec 12 - Mon, Dec 14

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

6h 10mnonstop

4:30 pm - 12:31 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 01mnonstop

$297Delta

Thu, Dec 3 - Wed, Dec 9

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

6h 10mnonstop

4:30 pm - 12:31 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

5h 01mnonstop

$297Delta

Sat, Dec 5 - Tue, Dec 8

5:55 pm - 9:01 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

$297United Airlines

Thu, Dec 3 - Wed, Dec 9

5:55 pm - 9:01 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

$297United Airlines

Thu, Dec 3 - Mon, Dec 7

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

6h 05mnonstop

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

5h 00mnonstop

$427American Airlines

Wed, Dec 9 - Sun, Dec 13

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

6h 05mnonstop

9:40 pm - 5:35 amSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 55mnonstop

$427American Airlines

Mon, Dec 28 - Thu, Jan 7

5:31 pm - 8:32 pmIAD Washington, D.C. Dulles Intl-SEA Seattle/Tacoma Intl

6h 01mnonstop

8:30 am - 4:27 pmSEA Seattle/Tacoma Intl-IAD Washington, D.C. Dulles Intl

4h 57mnonstop

$735Multiple Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$199

Best time to beat the crowds with an average 27% drop in price.

Most popular time to fly with an average 20% increase in price.

Flight from Reagan Washington National 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

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$199 Find Cheap Flights from District of Columbia to Seattle - Compare and Save

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

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

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