$78+ Cheap flights from Missouri 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 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Oct 20 — Oct 271
Round-trip
1 adult, Economy
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Find cheap flights from Missouri 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
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Cheapest flights from Missouri to SeattleExplore the most affordable flight options available from Missouri to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 20, 2026.
Explore the most affordable flight options available from Missouri to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 20, 2026.
This Southwest deal was found by Cheapflights users on 9/15. 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 12/125:50 am -
1 stop7h 00m
Tue 12/159:25 am -
1 stop7h 10m
Deal found 9/15![Southwest logo]()
$212
This Delta deal was found by Cheapflights users on 9/16. 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 10/217:45 am -
1 stop9h 05m
Wed 10/286:00 am -
1 stop8h 43m
Deal found 9/16![Delta logo]()
$217
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:29 am -
1 stop10h 14m
Wed 10/283:14 pm -
1 stop7h 05m
Deal found 9/16![American Airlines logo]()
$222
This Southwest deal was found by Cheapflights users on 9/19. 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 11/67:15 pm -
1 stop7h 30m
Tue 11/1011:35 am -
2 stops9h 35m
Deal found 9/19![Southwest logo]()
$227
This Southwest deal was found by Cheapflights users on 9/19. 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 10/248:25 am -
2 stops13h 40m
Sat 10/317:40 am -
1 stop9h 05m
Deal found 9/19![Southwest logo]()
$228
This Southwest deal was found by Cheapflights users on 9/18. 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 12/32:35 pm -
2 stops9h 45m
Sun 12/612:15 am -
1 stop8h 45m
Deal found 9/18![Southwest logo]()
$232
This Southwest deal was found by Cheapflights users on 9/18. 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 11/412:40 pm -
2 stops11h 40m
Mon 11/99:25 pm -
1 stop12h 35m
Deal found 9/18![Southwest logo]()
$233
This Southwest deal was found by Cheapflights users on 9/19. 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 10/305:50 pm -
2 stops8h 50m
Mon 11/211:20 am -
2 stops11h 30m
Deal found 9/19![Southwest logo]()
$237
This Southwest deal was found by Cheapflights users on 9/18. 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.
Mon 11/97:20 pm -
1 stop7h 40m
Fri 11/135:30 am -
2 stops11h 40m
Deal found 9/18![Southwest logo]()
$238
This Delta deal was found by Cheapflights users on 9/15. 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 11/16:21 am -
1 stop6h 29m
Tue 11/311:10 pm -
1 stop8h 39m
Deal found 9/15![Delta logo]()
$248
This CheapOair deal was found by Cheapflights users on 9/17. 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.
Mon 10/512:17 pm -
1 stop23h 25m
Tue 10/64:27 pm -
1 stop24h 50m
Deal found 9/17![Frontier logo]()
$251
This Cheapflightsfares deal was found by Cheapflights users on 9/19. 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 10/168:43 pm -
1 stop20h 29m
Tue 10/204:27 pm -
1 stop25h 21m
Deal found 9/19![Frontier logo]()
$277
Best flights from Missouri to SeattleDiscover carefully curated flight deals from Missouri to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 20, 2026.
Discover carefully curated flight deals from Missouri to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 20, 2026.
This Delta deal was found by Cheapflights users on 9/18. 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.
Mon 10/262:38 pm -
1 stop9h 27m
Mon 11/1611:47 pm -
1 stop7h 32m
Deal found 9/18![Delta logo]()
$227
This Southwest deal was found by Cheapflights users on 9/19. 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 11/67:15 pm -
1 stop7h 30m
Tue 11/1011:35 am -
2 stops9h 35m
Deal found 9/19![Southwest logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/169:04 am -
2 stops13h 33m
Mon 10/1911:59 pm -
1 stop8h 11m
Deal found 9/16![United Airlines logo]()
$332
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:49 pm -
1 stop8h 08m
Sun 10/1811:59 pm -
1 stop7h 59m
Deal found 9/15![American Airlines logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 9/17. 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 10/1310:12 am -
2 stops14h 21m
Sat 10/2412:24 am -
1 stop6h 56m
Deal found 9/17![Alaska Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 9/19. 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 12/32:35 pm -
2 stops9h 45m
Sun 12/612:15 am -
1 stop8h 45m
Deal found 9/19![Southwest logo]()
$232
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:30 pm -
1 stop7h 58m
Wed 10/2111:41 pm -
1 stop14h 44m
Deal found 9/16![Multiple Airlines logo]()
$572
This Delta deal was found by Cheapflights users on 9/17. 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 10/95:59 pm -
1 stop8h 00m
Wed 10/145:55 pm -
Nonstop3h 36m
Deal found 9/17![Delta logo]()
$287
This Southwest deal was found by Cheapflights users on 9/15. 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 10/155:10 am -
1 stop6h 40m
Thu 10/222:10 pm -
2 stops8h 30m
Deal found 9/15![Southwest logo]()
$317
This United Airlines deal was found by Cheapflights users on 9/19. 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 11/18:00 am -
1 stop8h 39m
Tue 11/36:00 am -
2 stops10h 05m
Deal found 9/19![United Airlines logo]()
$352
This Delta deal was found by Cheapflights users on 9/15. 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 -
Nonstop4h 11m
Wed 12/25:54 pm -
Nonstop3h 29m
Deal found 9/15![Delta logo]()
$332
This Southwest deal was found by Cheapflights users on 9/19. 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.
Mon 10/195:50 pm -
2 stops8h 50m
Mon 10/266:50 pm -
1 stop13h 00m
Deal found 9/19![Southwest logo]()
$323
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 10/86:17 am -
Nonstop4h 03m
Sun 10/116:27 pm -
Nonstop3h 32m
Deal found 9/15![Alaska Airlines logo]()
$407
This Delta deal was found by Cheapflights users on 9/17. 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 10/237:00 am -
Nonstop4h 04m
Mon 10/2610:35 pm -
1 stop8h 54m
Deal found 9/17![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/2010:27 am -
2 stops12h 10m
Fri 10/2312:00 pm -
1 stop8h 30m
Deal found 9/15![United Airlines logo]()
$392
This Southwest deal was found by Cheapflights users on 9/16. 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.
Mon 10/193:35 pm -
2 stops11h 05m
Wed 10/213:30 pm -
1 stop6h 50m
Deal found 9/16![Southwest logo]()
$327
This Delta deal was found by Cheapflights users on 9/15. 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.
Mon 10/264:03 pm -
1 stop9h 53m
Fri 10/305:55 pm -
Nonstop3h 36m
Deal found 9/15![Delta logo]()
$347
This Alaska Airlines deal was found by Cheapflights users on 9/19. 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 10/176:14 pm -
1 stop6h 11m
Tue 10/201:55 pm -
2 stops25h 23m
Deal found 9/19![Alaska Airlines logo]()
$430
This Southwest deal was found by Cheapflights users on 9/16. 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.
Tue 12/811:40 am -
2 stops9h 00m
Sun 12/137:30 am -
2 stops8h 10m
Deal found 9/16![Southwest logo]()
$332
This American Airlines deal was found by Cheapflights users on 9/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/26:00 am -
1 stop9h 19m
Tue 10/611:45 pm -
1 stop7h 16m
Deal found 9/19![American Airlines logo]()
$494
This Delta deal was found by Cheapflights users on 9/15. 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 10/167:16 am -
1 stop9h 34m
Sun 10/185:55 pm -
Nonstop3h 36m
Deal found 9/15![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 9/15. 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 9/309:00 am -
1 stop6h 21m
Sun 10/411:13 pm -
1 stop9h 26m
Deal found 9/15![United Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 9/16. 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 10/146:55 am -
2 stops8h 40m
Sat 10/1712:10 am -
1 stop7h 00m
Deal found 9/16![Southwest logo]()
$332
This Southwest deal was found by Cheapflights users on 9/18. 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 10/288:35 am -
1 stop7h 45m
Sun 11/17:55 am -
2 stops9h 15m
Deal found 9/18![Southwest logo]()
$332
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/11:30 pm -
1 stop6h 07m
Mon 10/52:27 pm -
1 stop7h 17m
Deal found 9/15![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 2/61:33 pm -
1 stop6h 36m
Tue 2/93:51 pm -
1 stop5h 53m
Deal found 9/16![United Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 9/17. 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 10/37:24 am -
Nonstop3h 51m
Sat 10/105:55 pm -
Nonstop3h 36m
Deal found 9/17![Delta logo]()
$432
This Southwest deal was found by Cheapflights users on 9/15. 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 10/96:10 pm -
1 stop8h 30m
Wed 10/1412:05 pm -
2 stops8h 05m
Deal found 9/15![Southwest logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 1/308:00 am -
2 stops12h 09m
Tue 2/27:32 pm -
2 stops13h 23m
Deal found 9/16![United Airlines logo]()
$479
This Mytrip deal was found by Cheapflights users on 9/18. 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 10/33:35 pm -
3 stops31h 05m
Wed 10/710:53 am -
3 stops25h 02m
Deal found 9/18![Multiple Airlines logo]()
$788
Last-minute flights from Missouri to SeattleDiscover last-minute flight deals from Missouri to Seattle. Data last updated September 20, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Seattle. Data last updated September 20, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 9/17. 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.
Mon 10/512:17 pm -
1 stop23h 25m
Tue 10/64:27 pm -
1 stop24h 50m
Deal found 9/17![Frontier logo]()
$251
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:23 pm -
1 stop9h 13m
Sat 10/173:14 pm -
1 stop7h 05m
Deal found 9/16![American Airlines logo]()
$258
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/136:04 am -
1 stop9h 03m
Sat 10/2412:25 am -
1 stop6h 55m
Deal found 9/16![American Airlines logo]()
$263
This Delta deal was found by Cheapflights users on 9/15. 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 10/167:00 pm -
1 stop6h 59m
Mon 10/1911:10 pm -
1 stop8h 39m
Deal found 9/15![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 9/17. 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.
Sat 10/174:49 pm -
1 stop6h 26m
Sat 10/2412:43 pm -
2 stops8h 48m
Deal found 9/17![United Airlines logo]()
$232
This Delta deal was found by Cheapflights users on 9/16. 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 10/217:45 am -
1 stop9h 05m
Wed 10/286:00 am -
1 stop8h 43m
Deal found 9/16![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 9/17. 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 10/215:20 am -
2 stops10h 15m
Tue 10/2712:10 am -
1 stop7h 15m
Deal found 9/17![Southwest logo]()
$264
This American Airlines deal was found by Cheapflights users on 9/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:29 am -
1 stop10h 14m
Thu 10/2211:59 pm -
1 stop8h 51m
Deal found 9/19![American Airlines logo]()
$253
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/237:29 am -
1 stop10h 14m
Wed 10/283:14 pm -
1 stop7h 05m
Deal found 9/16![American Airlines logo]()
$222
This Southwest deal was found by Cheapflights users on 9/19. 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 10/248:25 am -
2 stops13h 40m
Sat 10/317:40 am -
1 stop9h 05m
Deal found 9/19![Southwest logo]()
$228
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/258:00 am -
1 stop8h 39m
Tue 10/277:00 am -
1 stop6h 43m
Deal found 9/15![United Airlines logo]()
$266
This Southwest deal was found by Cheapflights users on 9/19. 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 10/305:50 pm -
2 stops8h 50m
Mon 11/211:20 am -
2 stops11h 30m
Deal found 9/19![Southwest logo]()
$237
One-way flights from Missouri to SeattleSearch for one-way flight options from Missouri to Seattle. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
Search for one-way flight options from Missouri to Seattle. Find affordable one-way fares based on user searches. Data last updated September 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/208:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$78
This Kiwi.com deal was found by Cheapflights users on 9/16. 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 11/178:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$79
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 12/158:32 pm -
1 stop21h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$82
This CheapOair deal was found by Cheapflights users on 9/15. 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.
Tue 10/278:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$85
This CheapOair deal was found by Cheapflights users on 9/15. 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.
Tue 12/88:36 pm -
1 stop21h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 9/18. 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 12/18:29 pm -
1 stop21h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$91
This Trip.com deal was found by Cheapflights users on 9/16. 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.
Tue 10/138:43 pm -
1 stop20h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$95
This Southwest deal was found by Cheapflights users on 9/15. 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 10/211:05 pm -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Southwest logo]()
$99
This Southwest deal was found by Cheapflights users on 9/15. 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 12/125:50 am -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Southwest logo]()
$104
This Delta deal was found by Cheapflights users on 9/17. 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.
Tue 11/179:45 am -
1 stop9h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Delta logo]()
$109
This Delta deal was found by Cheapflights users on 9/17. 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 11/156:13 am -
1 stop6h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Delta logo]()
$114
This Southwest deal was found by Cheapflights users on 9/16. 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 10/232:25 pm -
2 stops10h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$119
Find flight deals from Missouri to Seattle
Keep the following information in mind while searching for Missouri to Seattle flight deals. Data was last updated September 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $212 (Southwest) |
One-way from | $78 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $378 |
Good round-trip deal | $391 or less |
Good one-way deal | $227 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Missouri 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 September 20, 2026.
Use the filters below to find and compare flights from Missouri to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Thu 10/29
7:30 pm-12:40 am
1 stop7h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$99
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Thu 12/17
8:40 pm-1:15 am
1 stop6h 35m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$99
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Wed 11/4
2:25 pm-10:20 pm
1 stop9h 55m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$99
Kansas CitySeattle
MCI Kansas City - SEA Seattle/Tacoma Intl
MCISEA
Kansas City
Fri 10/30
3:35 pm-12:40 am
2 stops11h 05m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$104
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Sat 12/12
5:50 am-10:50 am
1 stop7h 00m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$104
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Wed 11/18
6:13 am-12:29 pm
1 stop8h 16m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$109
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Thu 12/17
6:09 pm-11:16 pm
1 stop7h 07m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$114
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Mon 11/16
7:08 am-12:40 pm
1 stop7h 32m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$114
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Thu 11/12
9:45 am-5:10 pm
1 stop9h 25m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$114
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Mon 12/14
2:17 pm-10:04 pm
1 stop9h 47m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$114
Showing 1-10 of 55 resultsSorted by cheapest first
Best time to book a flight from Missouri to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Missouri with our price prediction graph.
MCI-SEA
STL-SEA
SGF-SEA
COU-SEA
IRK-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 Missouri to Seattle
USMO-SEA
MCI-SEA
STL-SEA
SGF-SEA
COU-SEA
What is the cheapest month to book a flight from Missouri to Seattle?
Currently, February is the cheapest month in which you can book a flight from Missouri to Seattle (average of $241). Flying from Missouri to Seattle in July is currently the most expensive (average of $518). 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 MO to SEA?
Find hourly flight availability from Missouri 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 September 20, 2026.
One of the essential ways to save on airfare from Missouri to Seattle is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 12% on airfare.
How much does it cost to fly round-trip from Missouri to Seattle?
Airfare is below average for this route at the moment.
Missouri to Seattle flights typically cost between $261 and $460 in December.The cheapest round-trip price found within the last 5 days was $212 on Southwest (Dec 12-Dec 15).
How far ahead should I book a flight from Missouri to Seattle?
The price you pay for your flight from Missouri to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 39 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 Missouri to Seattle?
Use this chart to determine the cheapest time to fly round-trip from Missouri to Seattle. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Missouri to Seattle flight should consider departing on Tuesday 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.
Related info for your journey
Find useful and relevant information for your journey from Missouri 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
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
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Alternative routes for Missouri to Seattle
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Complete your trip
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Search flights from Missouri to Seattle by cabin class
Find flights from Missouri to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Missouri and Seattle flights
Browse other Missouri and Seattle flight options. Last updated on September 20, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 20, 2026.
Missouri to Seattle flights
Consider these flights traveling from Missouri to Seattle.
Top 6 airlines flying from Missouri to Seattle
Discover the top 6 airlines that operate flights from Missouri 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 September 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$129 | Average$301 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$134 | Average$319 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$152 | Average$424 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$186 | Average$467 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$198 | Average$423 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$216 | Average$461 | FlexibilityNo cancel fee | On-time69% |