$108+ 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 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Dec 5 — Dec 121
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
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.Cheap flight deals from Missouri to Seattle
Cheapest
Best
Last-minute
One-way
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 November 5, 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 November 5, 2026.
This Delta deal was found by Cheapflights users on 11/2. 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 12/25:20 pm -
1 stop8h 33m
Wed 12/911:15 pm -
1 stop8h 04m
Deal found 11/2![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/58:40 am -
2 stops9h 43m
Tue 12/82:05 pm -
1 stop6h 54m
Deal found 11/2![United Airlines logo]()
$232
This Delta deal was found by Cheapflights users on 11/2. 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 12/27:08 am -
1 stop9h 35m
Mon 12/79:50 am -
1 stop8h 42m
Deal found 11/2![Delta logo]()
$237
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 11/258:29 pm -
1 stop20h 53m
Wed 12/24:58 pm -
1 stop24h 35m
Deal found 11/5![Frontier logo]()
$238
This Southwest deal was found by Cheapflights users on 11/2. 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 12/22:25 pm -
1 stop11h 10m
Wed 12/95:40 am -
2 stops9h 45m
Deal found 11/2![Southwest logo]()
$238
This United Airlines deal was found by Cheapflights users on 10/31. 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 12/58:40 am -
2 stops9h 43m
Mon 12/75:05 am -
1 stop5h 48m
Deal found 10/31![United Airlines logo]()
$242
This Delta deal was found by Cheapflights users on 11/1. 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 12/217:46 pm -
1 stop6h 24m
Mon 12/2811:59 pm -
1 stop8h 36m
Deal found 11/1![Delta logo]()
$247
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/241:29 pm -
1 stop25h 08m
Sat 12/197:47 pm -
1 stop14h 13m
Deal found 11/3![Frontier logo]()
$248
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 12/47:58 pm -
1 stop21h 45m
Fri 12/114:58 pm -
1 stop15h 59m
Deal found 11/4![Frontier logo]()
$253
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 12/38:29 pm -
1 stop21h 11m
Wed 12/94:58 pm -
1 stop24h 37m
Deal found 11/3![Frontier logo]()
$257
This Delta deal was found by Cheapflights users on 11/3. 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 12/46:32 am -
1 stop10h 31m
Mon 12/711:15 pm -
1 stop8h 04m
Deal found 11/3![Delta logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 11/258:29 pm -
1 stop20h 53m
Fri 11/279:53 pm -
1 stop12h 41m
Deal found 11/2![Frontier logo]()
$260
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 November 5, 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 November 5, 2026.
This Delta deal was found by Cheapflights users on 11/2. 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 12/207:46 pm -
1 stop6h 24m
Sat 12/2611:59 pm -
1 stop8h 36m
Deal found 11/2![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 11/3. 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 12/28:17 am -
1 stop10h 05m
Wed 12/95:05 am -
1 stop5h 48m
Deal found 11/3![United Airlines logo]()
$308
This Southwest deal was found by Cheapflights users on 11/1. 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 11/261:10 pm -
1 stop6h 30m
Thu 12/35:15 am -
2 stops13h 55m
Deal found 11/1![Southwest logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 12/126:30 am -
Nonstop4h 20m
Mon 12/149:55 am -
Nonstop3h 28m
Deal found 11/1![Alaska Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 11/5. 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 12/812:40 pm -
2 stops11h 40m
Fri 12/117:55 am -
2 stops9h 15m
Deal found 11/5![Southwest logo]()
$367
This United Airlines deal was found by Cheapflights users on 10/31. 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 1/81:38 pm -
1 stop6h 34m
Tue 1/194:00 pm -
1 stop5h 44m
Deal found 10/31![United Airlines logo]()
$377
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 12/56:30 am -
Nonstop4h 20m
Thu 12/109:55 am -
Nonstop3h 28m
Deal found 10/31![Alaska Airlines logo]()
$397
This Delta deal was found by Cheapflights users on 11/2. 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 12/1010:34 am -
1 stop8h 13m
Sun 12/135:54 pm -
Nonstop3h 29m
Deal found 11/2![Delta logo]()
$407
This United Airlines deal was found by Cheapflights users on 11/3. 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 1/1711:22 am -
1 stop10h 06m
Wed 1/277:00 am -
1 stop7h 16m
Deal found 11/3![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 12/114:19 pm -
Nonstop4h 13m
Mon 12/149:55 am -
Nonstop3h 28m
Deal found 11/2![Alaska Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 11/3. 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 12/235:05 pm -
1 stop8h 05m
Wed 12/305:35 am -
2 stops11h 35m
Deal found 11/3![Southwest logo]()
$413
This United Airlines deal was found by Cheapflights users on 11/1. 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.
Mon 11/234:56 pm -
1 stop7h 55m
Thu 11/267:35 pm -
2 stops13h 01m
Deal found 11/1![United Airlines logo]()
$384
This Alaska Airlines deal was found by Cheapflights users on 11/2. 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 12/26:30 am -
Nonstop4h 20m
Tue 12/89:55 am -
Nonstop3h 28m
Deal found 11/2![Alaska Airlines logo]()
$397
This United Airlines deal was found by Cheapflights users on 11/1. 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.
Mon 11/235:45 am -
1 stop6h 02m
Thu 11/267:35 pm -
2 stops12h 56m
Deal found 11/1![United Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 11/5. 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 12/2311:45 am -
2 stops8h 50m
Tue 12/291:45 pm -
2 stops10h 10m
Deal found 11/5![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 11/5. 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 12/242:50 pm -
2 stops9h 30m
Mon 12/281:45 pm -
2 stops10h 10m
Deal found 11/5![Southwest logo]()
$467
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 11/246:00 am -
Nonstop4h 40m
Wed 12/910:50 am -
Nonstop3h 50m
Deal found 10/31![Alaska Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 10/31. 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 11/146:00 am -
1 stop8h 19m
Tue 11/249:05 am -
1 stop7h 00m
Deal found 10/31![United Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 10/31. 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 11/103:25 pm -
1 stop8h 55m
Fri 11/137:55 am -
1 stop9h 15m
Deal found 10/31![Southwest logo]()
$486
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Mon 1/251:35 pm -
2 stops9h 13m
Sat 1/308:56 am -
2 stops9h 59m
Deal found 11/3![United Airlines logo]()
$470
This Southwest deal was found by Cheapflights users on 11/1. 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 11/105:05 am -
1 stop9h 55m
Thu 11/127:55 am -
1 stop9h 15m
Deal found 11/1![Southwest logo]()
$486
This United Airlines deal was found by Cheapflights users on 10/31. 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 12/51:36 pm -
2 stops9h 11m
Thu 12/108:30 am -
1 stop5h 43m
Deal found 10/31![United Airlines logo]()
$492
This Southwest deal was found by Cheapflights users on 10/31. 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 11/305:40 pm -
1 stop10h 05m
Sun 12/612:15 am -
1 stop6h 35m
Deal found 10/31![Southwest logo]()
$512
This United Airlines deal was found by Cheapflights users on 11/2. 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 1/141:38 pm -
2 stops10h 21m
Mon 1/1812:25 pm -
1 stop7h 26m
Deal found 11/2![United Airlines logo]()
$492
This United Airlines deal was found by Cheapflights users on 11/5. 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.
Mon 12/74:12 pm -
1 stop7h 46m
Mon 12/149:01 am -
2 stops12h 43m
Deal found 11/5![United Airlines logo]()
$492
This United Airlines deal was found by Cheapflights users on 11/1. 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 1/93:12 pm -
1 stop9h 33m
Wed 1/137:00 am -
2 stops11h 30m
Deal found 11/1![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 10/31. 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 2/63:12 pm -
1 stop9h 33m
Tue 2/98:30 am -
2 stops13h 00m
Deal found 10/31![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 11/3. 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 1/2011:22 am -
1 stop10h 16m
Sat 1/238:30 am -
2 stops11h 14m
Deal found 11/3![United Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/21:20 pm -
2 stops10h 38m
Fri 12/112:05 pm -
1 stop7h 25m
Deal found 11/1![United Airlines logo]()
$504
This United Airlines deal was found by Cheapflights users on 11/2. 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 1/67:30 am -
2 stops12h 42m
Tue 1/125:00 am -
2 stops11h 08m
Deal found 11/2![United Airlines logo]()
$509
Last-minute flights from Missouri to SeattleDiscover last-minute flight deals from Missouri to Seattle. Data last updated November 5, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Seattle. Data last updated November 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/241:29 pm -
1 stop25h 08m
Sat 12/197:47 pm -
1 stop14h 13m
Deal found 11/3![Frontier logo]()
$248
This Cheapflightsfares deal was found by Cheapflights users on 11/5. 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 11/258:29 pm -
1 stop20h 53m
Wed 12/24:58 pm -
1 stop24h 35m
Deal found 11/5![Frontier logo]()
$238
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 11/258:29 pm -
1 stop20h 53m
Fri 11/279:53 pm -
1 stop12h 41m
Deal found 11/2![Frontier logo]()
$260
This Delta deal was found by Cheapflights users on 11/2. 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 12/25:20 pm -
1 stop8h 33m
Wed 12/911:15 pm -
1 stop8h 04m
Deal found 11/2![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 11/2. 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 12/27:08 am -
1 stop9h 35m
Mon 12/79:50 am -
1 stop8h 42m
Deal found 11/2![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 11/2. 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 12/22:25 pm -
1 stop11h 10m
Wed 12/95:40 am -
2 stops9h 45m
Deal found 11/2![Southwest logo]()
$238
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 12/38:29 pm -
1 stop21h 11m
Wed 12/94:58 pm -
1 stop24h 37m
Deal found 11/3![Frontier logo]()
$257
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 12/47:58 pm -
1 stop21h 45m
Fri 12/114:58 pm -
1 stop15h 59m
Deal found 11/4![Frontier logo]()
$253
This Delta deal was found by Cheapflights users on 11/3. 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 12/46:32 am -
1 stop10h 31m
Mon 12/711:15 pm -
1 stop8h 04m
Deal found 11/3![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 11/2. 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 12/58:40 am -
2 stops9h 43m
Tue 12/82:05 pm -
1 stop6h 54m
Deal found 11/2![United Airlines logo]()
$232
This United Airlines deal was found by Cheapflights users on 10/31. 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 12/58:40 am -
2 stops9h 43m
Mon 12/75:05 am -
1 stop5h 48m
Deal found 10/31![United Airlines logo]()
$242
This Delta deal was found by Cheapflights users on 11/1. 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 12/217:46 pm -
1 stop6h 24m
Mon 12/2811:59 pm -
1 stop8h 36m
Deal found 11/1![Delta logo]()
$247
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 November 5, 2026.
Search for one-way flight options from Missouri to Seattle. Find affordable one-way fares based on user searches. Data last updated November 5, 2026.
This Super.com deal was found by Cheapflights users on 11/4. 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.
Fri 1/227:02 pm -
1 stop22h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$108
This American Airlines deal was found by Cheapflights users on 11/1. 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 12/157:27 am -
1 stop10h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![American Airlines logo]()
$114
This Southwest deal was found by Cheapflights users on 11/2. 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 12/1511:20 am -
2 stops9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Southwest logo]()
$119
This Super.com deal was found by Cheapflights users on 10/31. 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.
Sat 11/218:29 pm -
1 stop20h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$124
This Delta deal was found by Cheapflights users on 11/2. 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 12/43:32 pm -
1 stop7h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Delta logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 11/241:29 pm -
1 stop25h 08m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/88:32 pm -
1 stop21h 11m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Frontier logo]()
$128
This Delta deal was found by Cheapflights users on 11/3. 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 1/186:10 am -
1 stop8h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Delta logo]()
$129
This Southwest deal was found by Cheapflights users on 11/4. 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 12/75:30 am -
1 stop7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![Southwest logo]()
$134
This United Airlines deal was found by Cheapflights users on 11/4. 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 1/223:10 pm -
2 stops10h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/4![United Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 12/28:29 pm -
2 stops25h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 11/1. 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 12/318:51 pm -
1 stop17h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$143
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 November 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $227 (Delta) |
One-way from | $108 (Super.com) |
Popular in | July |
Cheapest in | February |
Average price | $400 |
Good round-trip deal | $439 or less |
Good one-way deal | $208 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 November 5, 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
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Wed 12/16
3:25 pm-10:20 pm
1 stop8h 55m
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
Tue 12/8
3:32 pm-8:49 pm
1 stop7h 17m
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
Tue 12/15
7:27 am-3:58 pm
1 stop10h 31m
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
Wed 12/9
6:25 am-1:00 pm
1 stop8h 35m
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
Wed 12/16
8:40 am-4:22 pm
2 stops9h 42m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$119
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Wed 1/27
6:20 am-2:40 pm
1 stop10h 20m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$119
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Wed 1/20
6:15 am-1:13 pm
1 stop8h 58m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$124
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Wed 1/13
3:26 pm-8:50 pm
1 stop7h 24m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$124
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Mon 1/18
6:10 am-12:27 pm
1 stop8h 17m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$124
St. LouisSeattle
STL Lambert-St Louis - SEA Seattle/Tacoma Intl
STLSEA
Lambert-St Louis
Mon 1/18
5:40 pm-12:55 am
2 stops9h 15m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$129
Showing 1-10 of 58 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.
STL-SEA
MCI-SEA
SGF-SEA
COU-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
STL-SEA
MCI-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 $237). Flying from Missouri to Seattle in July is currently the most expensive (average of $520). 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 November 5, 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 13% 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 $248 and $558 in December.The cheapest round-trip price found within the last 5 days was $227 on Delta (Dec 2-Dec 9).
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 29 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 October 31, 2026.
Travelers seeking maximum savings on their Missouri to Seattle flight should consider departing on Thursday 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.
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
Lacey
Tacoma
Leavenworth
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
Issaquah
Olympia
Lakewood
Poulsbo
Marysville
Shoreline
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Seattle flight routes
Top destinations
Alternative routes for Missouri to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
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 November 5, 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 November 5, 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 November 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$124 | Average$320 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$134 | Average$323 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$152 | Average$431 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$191 | Average$457 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$198 | Average$435 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$216 | Average$480 | FlexibilityNo cancel fee | On-time69% |