$204+ Cheap flights from Washington, D.C. (WAS) to Seattle (SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/6. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — SEA
Nov 28 — Dec 51
Round-trip
1 adult, Economy
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Find cheap flights from Washington, D.C. to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Washington, D.C. to Seattle/Tacoma Intl are usually found in February or January, booked 55 days in advance, depart on a Wednesday or Tuesday and return on a Friday
Cheap flight deals from Washington, D.C. to Seattle
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Cheapest flights from Washington, D.C. to SeattleExplore the most affordable flight options available from Washington, D.C. to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2026.
Explore the most affordable flight options available from Washington, D.C. to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:00 am -
1 stop11h 43m
Sat 12/124:58 pm -
1 stop20h 57m
Deal found 10/27![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/47:00 am -
1 stop11h 40m
Fri 12/114:58 pm -
1 stop16h 57m
Deal found 10/28![Frontier logo]()
$293
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:00 am -
Nonstop6h 10m
Wed 12/94:30 pm -
Nonstop5h 01m
Deal found 10/28![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/34:25 pm -
Nonstop6h 20m
Tue 12/87:20 am -
Nonstop4h 46m
Deal found 10/28![Delta logo]()
$297
This Expedia deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop11h 22m
Thu 12/32:02 pm -
Nonstop4h 57m
Deal found 10/28![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:00 am -
1 stop11h 43m
Mon 12/144:58 pm -
1 stop20h 57m
Deal found 10/27![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop11h 22m
Thu 12/31:32 pm -
2 stops24h 20m
Deal found 10/27![Frontier logo]()
$302
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:31 pm -
2 stops24h 14m
Sat 11/219:53 pm -
1 stop28h 17m
Deal found 10/26![Frontier logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 am -
1 stop11h 40m
Mon 12/74:58 pm -
1 stop20h 57m
Deal found 10/27![Frontier logo]()
$303
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/28:07 am -
1 stop9h 29m
Fri 12/114:30 pm -
Nonstop5h 01m
Deal found 10/28![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:05 am -
1 stop9h 26m
Mon 12/77:20 am -
Nonstop4h 46m
Deal found 10/28![Delta logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/138:55 pm -
2 stops21h 48m
Sun 12/206:25 pm -
1 stop8h 42m
Deal found 10/24![Frontier logo]()
$309
Best flights from Washington, D.C. to SeattleDiscover carefully curated flight deals from Washington, D.C. to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 29, 2026.
Discover carefully curated flight deals from Washington, D.C. to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 29, 2026.
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/54:25 pm -
Nonstop6h 20m
Sat 12/127:20 am -
Nonstop4h 46m
Deal found 10/28![Delta logo]()
$297
This Alaska Airlines deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:05 pm -
Nonstop6h 17m
Sat 12/122:02 pm -
Nonstop4h 57m
Deal found 10/25![Alaska Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:10 pm -
1 stop8h 33m
Thu 12/107:00 am -
1 stop7h 09m
Deal found 10/28![United Airlines logo]()
$379
This Southwest deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/59:25 am -
1 stop10h 20m
Sat 12/126:45 am -
2 stops10h 50m
Deal found 10/24![Southwest logo]()
$402
This Delta deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/97:00 am -
Nonstop6h 10m
Wed 12/164:30 pm -
Nonstop5h 01m
Deal found 10/25![Delta logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/135:30 pm -
Nonstop6h 03m
Sun 1/248:30 am -
Nonstop4h 57m
Deal found 10/24![Alaska Airlines logo]()
$397
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/53:15 pm -
1 stop9h 44m
Sun 1/108:08 am -
Nonstop5h 01m
Deal found 10/28![United Airlines logo]()
$403
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/94:25 pm -
Nonstop6h 20m
Tue 12/157:20 am -
Nonstop4h 46m
Deal found 10/27![Delta logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/58:00 am -
Nonstop6h 03m
Sun 1/108:00 am -
Nonstop5h 03m
Deal found 10/24![Alaska Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/283:15 pm -
1 stop9h 44m
Mon 2/18:08 am -
Nonstop5h 01m
Deal found 10/24![United Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/44:25 pm -
Nonstop6h 20m
Mon 12/77:20 am -
Nonstop4h 46m
Deal found 10/27![Delta logo]()
$417
This Alaska Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/510:59 am -
1 stop10h 57m
Thu 1/76:30 am -
1 stop11h 30m
Deal found 10/24![Alaska Airlines logo]()
$417
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/195:27 pm -
Nonstop6h 00m
Thu 2/251:13 pm -
1 stop8h 54m
Deal found 10/28![United Airlines logo]()
$427
This Alaska Airlines deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/257:00 am -
Nonstop5h 48m
Wed 3/37:00 am -
1 stop9h 01m
Deal found 10/24![Alaska Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/13:14 pm -
1 stop9h 44m
Thu 12/108:09 am -
Nonstop4h 59m
Deal found 10/28![United Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/207:00 am -
Nonstop6h 05m
Tue 12/14:30 pm -
Nonstop5h 01m
Deal found 10/26![Delta logo]()
$447
This Alaska Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/117:00 am -
Nonstop6h 05m
Mon 12/143:00 pm -
1 stop23h 39m
Deal found 10/27![Alaska Airlines logo]()
$427
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:26 am -
1 stop8h 05m
Sat 12/1211:55 am -
Nonstop5h 04m
Deal found 10/26![Delta logo]()
$447
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:25 pm -
Nonstop6h 02m
Tue 12/17:20 am -
Nonstop4h 46m
Deal found 10/28![Delta logo]()
$447
This Delta deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/317:00 am -
Nonstop6h 01m
Mon 2/1511:05 pm -
1 stop8h 08m
Deal found 10/28![Delta logo]()
$467
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:00 am -
1 stop7h 44m
Mon 12/287:55 am -
Nonstop4h 44m
Deal found 10/26![Delta logo]()
$467
Last-minute flights from Washington, D.C. to SeattleDiscover last-minute flight deals from Washington, D.C. to Seattle. Data last updated October 29, 2026 and is based on user searches.
Discover last-minute flight deals from Washington, D.C. to Seattle. Data last updated October 29, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:00 am -
1 stop11h 12m
Sat 11/214:37 pm -
1 stop17h 22m
Deal found 10/28![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:00 am -
1 stop11h 12m
Wed 11/184:27 pm -
1 stop16h 42m
Deal found 10/28![Frontier logo]()
$327
This Mytrip deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:31 pm -
2 stops24h 14m
Sat 11/219:53 pm -
1 stop28h 17m
Deal found 10/26![Frontier logo]()
$303
This Cheapflightsfares deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Sat 11/214:37 pm -
1 stop17h 22m
Deal found 10/25![Frontier logo]()
$316
This Trip.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Mon 11/234:37 pm -
1 stop17h 22m
Deal found 10/26![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Wed 11/187:48 pm -
2 stops17h 59m
Deal found 10/26![Frontier logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:00 am -
1 stop11h 12m
Sun 11/224:37 pm -
1 stop17h 22m
Deal found 10/27![Frontier logo]()
$325
This Cheapflightsfares deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/201:09 pm -
1 stop26h 28m
Sat 11/219:53 pm -
1 stop28h 17m
Deal found 10/27![Frontier logo]()
$321
This Cheapflightsfares deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:00 am -
1 stop11h 22m
Thu 11/264:37 pm -
1 stop17h 22m
Deal found 10/24![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:00 am -
1 stop11h 22m
Fri 12/44:58 pm -
1 stop16h 57m
Deal found 10/24![Frontier logo]()
$321
This Expedia deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop11h 22m
Thu 12/32:02 pm -
Nonstop4h 57m
Deal found 10/28![Multiple Airlines logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:00 am -
1 stop11h 22m
Thu 12/31:32 pm -
2 stops24h 20m
Deal found 10/27![Frontier logo]()
$302
One-way flights from Washington, D.C. to SeattleSearch for one-way flight options from Washington, D.C. to Seattle. Find affordable one-way fares based on user searches. Data last updated October 29, 2026.
Search for one-way flight options from Washington, D.C. to Seattle. Find affordable one-way fares based on user searches. Data last updated October 29, 2026.
This Orbitz deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/66:53 pm -
1 stop17h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Alaska Airlines logo]()
$204
This Southwest deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/61:55 pm -
2 stops12h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Southwest logo]()
$204
This Super.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:00 am -
1 stop11h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$206
This Mytrip deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2510:47 pm -
2 stops19h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$208
This Cheapflightsfares deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/47:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$208
This Delta deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:00 am -
Nonstop6h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Delta logo]()
$209
This Priceline deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/255:00 pm -
Nonstop6h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Alaska Airlines logo]()
$209
This Frontier deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/77:00 am -
1 stop11h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Frontier logo]()
$210
This Kiwi.com deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2210:47 pm -
2 stops19h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$211
This Super.com deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/226:05 pm -
1 stop21h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/28![Frontier logo]()
$211
This Super.com deal was found by Cheapflights users on 10/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/196:00 pm -
1 stop24h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/24![Frontier logo]()
$212
This Trip.com deal was found by Cheapflights users on 10/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/207:00 am -
1 stop11h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$213
Find flight deals from Washington, D.C. to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $288 (Cheapflightsfares) |
One-way from | $204 (Orbitz) |
Popular in | July |
Cheapest in | February |
Average price | $450 |
Good round-trip deal | $377 or less |
Good one-way deal | $239 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington, D.C. to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Wed 12/30
7:05 am-10:00 am
Nonstop5h 55m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Wed 11/25
7:00 am-10:05 am
Nonstop6h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$209
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Wed 11/25
5:29 pm-11:07 pm
1 stop8h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Thu 12/24
6:50 pm-11:35 pm
1 stop7h 45m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Sun 12/20
5:35 pm-1:45 am
1 stop11h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$219
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Mon 1/25
7:00 am-10:01 am
Nonstop6h 01m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Thu 12/31
8:00 am-11:19 am
Nonstop6h 19m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Sun 12/6
7:00 am-10:10 am
Nonstop6h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
Washington, D.C.Seattle
DCA Washington, D.C. Reagan-National - SEA Seattle/Tacoma Intl
DCASEA
Washington, D.C. Reagan-National
Mon 1/11
4:48 pm-7:53 pm
Nonstop6h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$229
Washington, D.C.Seattle
IAD Washington, D.C. Dulles Intl - SEA Seattle/Tacoma Intl
IADSEA
Washington, D.C. Dulles Intl
Mon 1/25
3:15 pm-9:59 pm
1 stop9h 44m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$234
Showing 1-10 of 43 resultsSorted by cheapest first
Compare providers for flights from Washington, D.C. to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Washington, D.C. to Seattle in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C.-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C.-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C.-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C.-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C.-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Washington, D.C. to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Washington, D.C. with our price prediction graph.
WAS-SEA
DCA-SEA
IAD-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Washington, D.C. to Seattle
WAS-SEA
DCA-SEA
IAD-SEA
What is the cheapest month to book a flight from Washington, D.C. to Seattle?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Seattle (average of $282). Flying from Washington, D.C. to Seattle in July is currently the most expensive (average of $530). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from WAS to SEA?
Find hourly flight availability from Washington, D.C. to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 29, 2026.
It’s typically best to fly out from Washington, D.C. to Seattle in the afternoon. Doing so could potentially save you 23% on the flight price compared to flying at noon, which is usually more expensive.
How much does it cost to fly round-trip from Washington, D.C. to Seattle?
Airfare is below average for this route at the moment.
Washington, D.C. to Seattle flights typically cost between $369 and $614 in December.The cheapest round-trip price found within the last 5 days was $288 on Frontier (Dec 5-Dec 12).
What’s the top layover airport for flights from Washington, D.C. to Seattle?
Share of 1-stop round-trip flights from Washington, D.C. to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Denver (DEN) – chosen by Cheapflights users on 75% of 1-stop itineraries from Washington, D.C. to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Washington, D.C. to Seattle?
Average round-trip fare for 1-stop flights from Washington, D.C. to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of $376.
What’s the fastest layover option from Washington, D.C. to Seattle?
Shortest average travel time for 1-stop one-way flights from Washington, D.C. to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 8h 06m.
Which airport typically offers the quickest layover for flights from Washington, D.C. to Seattle?
Average layover duration for 1-stop one-way flights from Washington, D.C. to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 1h 02m.
How far ahead should I book a flight from Washington, D.C. to Seattle?
The best time to book flights from Washington, D.C. to Seattle is 54 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Washington, D.C. to Seattle?
Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Seattle. Price data was last updated on October 24, 2026.
Travelers seeking maximum savings on their Washington, D.C. to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Washington, D.C. to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated October 29, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andUnited Airlines from Washington, D.C. to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Boarding
8.1
Food
7.0
Overall
7.9
Entertainment
7.0
Comfort
7.8
Crew
8.5
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Washington, D.C. to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Tukwila
Snoqualmie
Puyallup
Lynnwood
Olympia
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
Issaquah
Lakewood
Poulsbo
Marysville
Shoreline
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Washington, D.C. and Seattle flights
Browse other Washington, D.C. and Seattle flight options. Last updated on October 29, 2026.
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Browse through other flights departing from Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on October 29, 2026.
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Top 7 airlines flying from Washington, D.C. to Seattle
Discover the top 7 airlines that operate flights from Washington, D.C. to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$98 | Average$378 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$123 | Average$344 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$179 | Average$473 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$423 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$201 | Average$455 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$219 | Average$369 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$236 | Average$495 | FlexibilityNo cancel fee | On-time75% |