$162+ Cheap flights from Seattle (SEA) to Washington, D.C. (WAS)
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 11/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — WAS
Nov 28 — Dec 51
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Washington, D.C. 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 Seattle/Tacoma Intl to Washington, D.C. are usually found in January or September, booked 34 days in advance, depart on a Friday or Thursday and return on a Wednesday
Cheap flight deals from Seattle to Washington, D.C.
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Cheapest flights from Seattle to Washington, D.C.Explore the most affordable flight options available from Seattle to Washington, D.C.. 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 Seattle to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 29, 2026.
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.
Thu 12/38:09 am -
Nonstop4h 59m
Mon 12/73:14 pm -
1 stop9h 44m
Deal found 10/28![United Airlines logo]()
$303
This Expedia deal was found by Cheapflights users on 10/29. 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 12/38:00 am -
Nonstop5h 05m
Mon 12/77:00 am -
1 stop11h 43m
Deal found 10/29![Multiple Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 10/29. 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 12/31:45 pm -
1 stop7h 02m
Wed 12/94:25 pm -
Nonstop6h 20m
Deal found 10/29![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 10/29. 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 12/34:30 pm -
Nonstop5h 01m
Sat 12/122:43 pm -
1 stop9h 06m
Deal found 10/29![Delta logo]()
$307
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 12/31:32 pm -
2 stops24h 20m
Mon 12/77:00 am -
1 stop11h 43m
Deal found 10/27![Frontier logo]()
$308
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.
Sat 12/54:58 pm -
1 stop16h 57m
Sat 12/127:00 am -
1 stop11h 43m
Deal found 10/26![Frontier logo]()
$312
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 12/22:05 pm -
1 stop7h 19m
Tue 12/83:14 pm -
1 stop9h 44m
Deal found 10/29![United Airlines logo]()
$312
This Delta deal was found by Cheapflights users on 10/29. 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 12/31:25 pm -
1 stop7h 22m
Fri 12/117:06 pm -
1 stop7h 47m
Deal found 10/29![Delta logo]()
$317
This Southwest deal was found by Cheapflights users on 10/29. 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.
Thu 12/36:30 am -
1 stop6h 45m
Wed 12/94:00 pm -
2 stops9h 50m
Deal found 10/29![Southwest logo]()
$322
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/54:58 pm -
2 stops21h 40m
Tue 12/810:35 pm -
2 stops20h 08m
Deal found 10/25![Frontier logo]()
$322
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/101:36 pm -
2 stops25h 02m
Tue 12/1510:35 pm -
2 stops20h 08m
Deal found 10/27![Frontier logo]()
$323
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:37 pm -
1 stop17h 22m
Thu 11/267:00 am -
1 stop11h 22m
Deal found 10/25![Frontier logo]()
$326
Best flights from Seattle to Washington, D.C.Discover carefully curated flight deals from Seattle to Washington, D.C. 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 Seattle to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 29, 2026.
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 12/58:15 am -
Nonstop5h 00m
Sat 12/126:42 pm -
1 stop17h 50m
Deal found 10/25![Alaska Airlines logo]()
$387
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1011:20 am -
1 stop9h 00m
Sun 12/136:30 pm -
1 stop9h 05m
Deal found 10/27![Southwest logo]()
$398
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 12/174:30 pm -
Nonstop5h 01m
Mon 1/117:05 am -
1 stop10h 45m
Deal found 10/28![Delta logo]()
$407
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/72:10 pm -
1 stop7h 35m
Sun 1/104:15 pm -
1 stop8h 02m
Deal found 10/26![United Airlines logo]()
$437
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/261:59 pm -
Nonstop5h 00m
Thu 12/318:00 am -
Nonstop6h 19m
Deal found 10/26![Alaska Airlines logo]()
$397
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/316:50 pm -
2 stops11h 00m
Wed 2/31:35 pm -
2 stops12h 00m
Deal found 10/27![Southwest logo]()
$427
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.
Sat 12/58:25 am -
1 stop6h 34m
Sat 12/124:25 pm -
Nonstop6h 20m
Deal found 10/25![Delta logo]()
$447
This Alaska Airlines deal was found by Cheapflights users on 10/29. 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.
Sun 11/222:00 pm -
Nonstop4h 59m
Thu 12/35:05 pm -
Nonstop6h 17m
Deal found 10/29![Alaska Airlines logo]()
$407
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.
Sun 1/108:08 am -
Nonstop5h 01m
Thu 1/142:34 pm -
1 stop9h 14m
Deal found 10/28![United Airlines logo]()
$467
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/268:30 am -
Nonstop4h 58m
Thu 12/317:05 am -
Nonstop5h 55m
Deal found 10/26![Alaska Airlines logo]()
$407
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 1/1011:12 pm -
1 stop6h 47m
Thu 1/144:48 pm -
Nonstop6h 05m
Deal found 10/28![Delta logo]()
$487
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/89:10 am -
2 stops10h 30m
Sun 1/101:55 pm -
2 stops12h 00m
Deal found 10/26![Southwest logo]()
$512
This Alaska Airlines 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/237:59 pm -
1 stop17h 01m
Wed 12/308:00 am -
Nonstop6h 19m
Deal found 10/26![Alaska Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 11/257:04 pm -
1 stop7h 15m
Thu 11/268:20 am -
1 stop8h 34m
Deal found 10/29![United Airlines logo]()
$531
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/188:30 am -
Nonstop4h 58m
Mon 1/116:53 pm -
1 stop17h 33m
Deal found 10/28![Alaska Airlines logo]()
$427
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.
Sun 12/2011:14 pm -
1 stop6h 39m
Sat 1/26:00 am -
1 stop9h 57m
Deal found 10/27![Delta logo]()
$567
This Southwest deal was found by Cheapflights users on 10/29. 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.
Fri 3/2612:10 am -
1 stop10h 40m
Tue 3/303:40 pm -
2 stops9h 40m
Deal found 10/29![Southwest logo]()
$578
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.
Fri 12/118:09 pm -
1 stop18h 30m
Thu 12/317:05 am -
Nonstop5h 55m
Deal found 10/25![Alaska Airlines logo]()
$437
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.
Sat 12/268:15 am -
Nonstop4h 45m
Sat 1/25:10 pm -
Nonstop6h 21m
Deal found 10/27![Delta logo]()
$567
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.
Thu 12/1710:40 pm -
1 stop7h 36m
Mon 1/47:05 am -
1 stop10h 45m
Deal found 10/25![Delta logo]()
$587
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 11/114:30 pm -
Nonstop4h 50m
Fri 11/207:00 am -
Nonstop6h 05m
Deal found 10/26![Delta logo]()
$592
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.
Sat 12/198:09 pm -
1 stop18h 42m
Sun 1/37:13 pm -
1 stop20h 34m
Deal found 10/27![Alaska Airlines logo]()
$570
Last-minute flights from Seattle to Washington, D.C.Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated October 29, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Washington, D.C.. Data last updated October 29, 2026 and is based on user searches.
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 11/114:27 pm -
1 stop16h 42m
Sat 11/147:00 am -
1 stop11h 12m
Deal found 10/24![Frontier logo]()
$346
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 11/184:27 pm -
1 stop21h 20m
Mon 11/237:00 am -
1 stop11h 22m
Deal found 10/25![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/184:27 pm -
1 stop16h 42m
Thu 12/36:00 pm -
1 stop24h 40m
Deal found 10/29![Frontier logo]()
$327
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
Thu 11/199:13 pm -
1 stop28h 57m
Thu 11/261:09 pm -
1 stop26h 28m
Deal found 10/29![Frontier logo]()
$338
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.
Thu 11/199:13 pm -
1 stop28h 57m
Sun 11/221:09 pm -
1 stop26h 28m
Deal found 10/25![Frontier logo]()
$346
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/204:37 pm -
1 stop17h 22m
Thu 12/36:00 pm -
1 stop24h 40m
Deal found 10/29![Frontier logo]()
$347
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/214:37 pm -
1 stop17h 22m
Thu 11/267:00 am -
1 stop11h 22m
Deal found 10/25![Frontier logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/224:37 pm -
1 stop17h 22m
Thu 12/36:00 pm -
1 stop24h 40m
Deal found 10/29![Frontier logo]()
$329
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.
Sun 11/229:53 pm -
1 stop28h 17m
Thu 11/261:09 pm -
1 stop26h 28m
Deal found 10/27![Frontier logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 11/234:37 pm -
1 stop17h 22m
Wed 12/27:00 am -
1 stop11h 40m
Deal found 10/29![Frontier logo]()
$331
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/254:37 pm -
1 stop26h 18m
Thu 12/31:33 pm -
1 stop29h 07m
Deal found 10/28![Frontier logo]()
$330
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/309:53 pm -
2 stops19h 19m
Fri 12/410:33 pm -
2 stops20h 10m
Deal found 10/27![Frontier logo]()
$339
One-way flights from Seattle to Washington, D.C.Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated October 29, 2026.
Search for one-way flight options from Seattle to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated October 29, 2026.
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.
Sat 11/214:37 pm -
1 stop17h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$162
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.
Tue 11/249:53 pm -
1 stop28h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$162
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/304:29 pm -
1 stop26h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$163
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/187:48 pm -
2 stops17h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$164
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.
Sat 11/219:53 pm -
1 stop28h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$164
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.
Sat 1/164:29 pm -
1 stop26h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$169
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/511:53 am -
2 stops33h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$169
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.
Mon 12/144:58 pm -
1 stop20h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$174
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.
Mon 11/234:37 pm -
1 stop17h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$175
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:13 pm -
1 stop28h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Frontier logo]()
$175
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/131:36 pm -
2 stops24h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$180
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/184:27 pm -
2 stops21h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/25![Frontier logo]()
$180
Find flight deals from Seattle to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Washington, D.C. (WAS). 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 | $303 (United Airlines) |
One-way from | $162 (Cheapflightsfares) |
Popular in | June |
Cheapest in | January |
Average price | $447 |
Good round-trip deal | $387 or less |
Good one-way deal | $208 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Washington, D.C. 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 Seattle to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - IAD Washington, D.C. Dulles Intl
SEAIAD
Seattle/Tacoma Intl
Sat 12/12
8:30 am-8:11 pm
1 stop8h 41m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$189
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Mon 3/1
12:10 am-11:25 am
1 stop8h 15m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$199
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Wed 1/6
9:10 am-9:00 pm
2 stops8h 50m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$204
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - IAD Washington, D.C. Dulles Intl
SEAIAD
Seattle/Tacoma Intl
Tue 12/15
8:15 am-4:15 pm
Nonstop5h 00m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - IAD Washington, D.C. Dulles Intl
SEAIAD
Seattle/Tacoma Intl
Tue 3/2
8:15 am-4:16 pm
Nonstop5h 01m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Tue 3/2
7:23 am-3:34 pm
Nonstop5h 11m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$209
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Sat 12/12
6:45 am-6:15 pm
2 stops8h 30m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$224
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - IAD Washington, D.C. Dulles Intl
SEAIAD
Seattle/Tacoma Intl
Thu 12/17
1:12 pm-9:13 pm
Nonstop5h 01m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$229
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Thu 1/7
7:25 am-3:20 pm
Nonstop4h 55m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$229
SeattleWashington, D.C.
SEA Seattle/Tacoma Intl - DCA Washington, D.C. Reagan-National
SEADCA
Seattle/Tacoma Intl
Mon 2/22
7:23 am-3:34 pm
Nonstop5h 11m
Washington, D.C. Reagan-National
Wed 12/31
12:00 am-9:00 pm
Nonstop0h 00m
$229
Showing 1-10 of 46 resultsSorted by cheapest first
Compare providers for flights from Seattle to Washington, D.C.
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 Seattle to Washington, D.C. 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 Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Washington, D.C. flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Washington, D.C. flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Washington, D.C. 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 Seattle-Washington, D.C. 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 Seattle to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Seattle with our price prediction graph.
SEA-WAS
SEA-IAD
SEA-DCA
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 Seattle to Washington, D.C.
SEA-WAS
SEA-IAD
SEA-DCA
What is the cheapest month to book a flight from Seattle to Washington, D.C.?
Currently, January is the cheapest month in which you can book a flight from Seattle to Washington, D.C. (average of $363). Flying from Seattle to Washington, D.C. in June is currently the most expensive (average of $525). 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 SEA to WAS?
Find hourly flight availability from Seattle to Washington, D.C.. 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.
When flying from Seattle to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 27% versus a flight at noon.
How much does it cost to fly round-trip from Seattle to Washington, D.C.?
Airfare is below average for this route at the moment.
Seattle to Washington, D.C. flights typically cost between $384 and $643 in December.The cheapest round-trip price found within the last 5 days was $303 on United Airlines (Dec 3-Dec 7).
What’s the top layover airport for flights from Seattle to Washington, D.C.?
Share of 1-stop round-trip flights from Seattle to Washington, D.C. chosen by Cheapflights users in the past 12 months, using the same layover each way.
San Diego (SAN) – chosen by Cheapflights users on 43% of 1-stop itineraries from Seattle to Washington, D.C. on Cheapflights.
What’s the cheapest layover airport for flights from Seattle to Washington, D.C.?
Average round-trip fare for 1-stop flights from Seattle to Washington, D.C., chosen by Cheapflights users in the past 12 months, with the same layover each way.
Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $294.
What’s the fastest layover option from Seattle to Washington, D.C.?
Shortest average travel time for 1-stop one-way flights from Seattle to Washington, D.C., based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Charlotte (CLT) have the shortest average one-way travel time for 1-stop routes: 7h 44m.
Which airport typically offers the quickest layover for flights from Seattle to Washington, D.C.?
Average layover duration for 1-stop one-way flights from Seattle to Washington, D.C., chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Charlotte (CLT) offer the fastest connection on this route, with an average layover time of 0h 50m.
How far ahead should I book a flight from Seattle to Washington, D.C.?
The price you pay for your flight from Seattle to Washington, D.C. may vary depending on when you book. For the best chance of a lower fare, look to book 80 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Seattle to Washington, D.C.?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Washington, D.C.. Price data was last updated on October 24, 2026.
Travelers seeking maximum savings on their Seattle to Washington, D.C. flight should consider departing on Wednesday afternoons 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 Seattle to Washington, D.C. 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 Seattle to Washington, D.C. trip
Our travel experts
Reviews of airlines servicing Washington, D.C.
Get insights into the airlines that provide service to Washington, D.C.. 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 Washington, D.C.. Reviews last updated October 29, 2026.
Read reviews from past customers who have flown Alaska Airlines,Southwest, andDelta from Seattle to Washington, D.C.. 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.
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Entertainment
7.0
Boarding
8.1
Food
7.0
Comfort
7.8
Crew
8.5
Overall
7.9
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Related info for your journey
Find useful and relevant information for your journey from Seattle to Washington, D.C.. 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 Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsAlexandria
Woodbridge
Arlington
Owings Mills
Lanham
Reston
Herndon
Hyattsville
Rockville
Springfield
Fredericksburg
Tysons
Falls Church
Towson
Silver Spring
Oxon Hill
Laurel
Clinton
Hunt Valley
Waldorf
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Seattle and Washington, D.C. flights
Browse other Seattle and Washington, D.C. flight options. Last updated on October 29, 2026.
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Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on October 29, 2026.
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Explore flights to Washington, D.C. departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 29, 2026.
Top 6 airlines flying from Seattle to Washington, D.C.
Discover the top 6 airlines that operate flights from Seattle to Washington, D.C.. 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$129 | Average$363 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$179 | Average$517 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$181 | Average$302 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$467 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$208 | Average$502 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$239 | Average$489 | FlexibilityNo cancel fee | On-time69% |