$100+ Cheap flights from Missouri to Seattle (SEA)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Jun 11 — Jun 181
Round-trip
1 adult, Economy
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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 May 12, 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 May 12, 2026.
This Trip.com deal was found by Cheapflights users on 5/8. 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 6/161:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Tue 6/237:41 pm
SEA
- MCI
1 stop15h 19m
Frontier
Deal found 5/8![Frontier logo]()
$238
This Super.com deal was found by Cheapflights users on 5/11. 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.
Sun 7/261:45 pm
MCI
- SEA
1 stop26h 34m
Frontier
Wed 7/297:41 pm
SEA
- MCI
1 stop15h 14m
Frontier
Deal found 5/11![Frontier logo]()
$239
This Mytrip deal was found by Cheapflights users on 5/7. 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 6/89:06 pm
STL
- SEA
1 stop15h 29m
Frontier
Wed 6/107:41 pm
SEA
- STL
1 stop21h 12m
Frontier
Deal found 5/7![Frontier logo]()
$239
This Mytrip deal was found by Cheapflights users on 5/7. 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 8/201:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Tue 8/257:41 pm
SEA
- MCI
1 stop15h 19m
Frontier
Deal found 5/7![Frontier logo]()
$240
This Booking.com deal was found by Cheapflights users on 5/9. 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.
Mon 7/131:45 pm
MCI
- SEA
1 stop22h 04m
Frontier
Wed 7/158:12 pm
SEA
- MCI
1 stop14h 43m
Frontier
Deal found 5/9![Frontier logo]()
$242
This Trip.com deal was found by Cheapflights users on 5/7. 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 6/231:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Tue 7/77:41 pm
SEA
- MCI
1 stop15h 14m
Frontier
Deal found 5/7![Frontier logo]()
$243
This Mytrip deal was found by Cheapflights users on 5/7. 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 8/151:45 pm
MCI
- SEA
1 stop22h 04m
Frontier
Sat 8/228:13 pm
SEA
- MCI
1 stop14h 42m
Frontier
Deal found 5/7![Frontier logo]()
$248
This Trip.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Mon 6/87:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/9![Frontier logo]()
$251
This Mytrip deal was found by Cheapflights users on 5/7. 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 8/131:50 pm
MCI
- SEA
1 stop22h 49m
Frontier
Mon 8/177:41 pm
SEA
- MCI
1 stop15h 19m
Frontier
Deal found 5/7![Frontier logo]()
$254
This Mytrip deal was found by Cheapflights users on 5/7. 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 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Sat 6/67:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/7![Frontier logo]()
$254
This Booking.com deal was found by Cheapflights users on 5/9. 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.
Sat 8/291:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Mon 8/317:41 pm
SEA
- MCI
1 stop15h 19m
Frontier
Deal found 5/9![Frontier logo]()
$256
This Trip.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Wed 6/37:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/7![Frontier logo]()
$256
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 May 12, 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 May 12, 2026.
This United Airlines deal was found by Cheapflights users on 5/8. 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 8/185:10 am
STL
- SEA
1 stop6h 51m
United Airlines
Tue 8/258:40 am
SEA
- STL
1 stop5h 54m
United Airlines
Deal found 5/8![United Airlines logo]()
$279
This Delta deal was found by Cheapflights users on 5/11. 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 6/17:40 pm
MCI
- SEA
1 stop6h 30m
Delta
Sat 6/65:30 pm
SEA
- MCI
Nonstop3h 38m
Delta
Deal found 5/11![Delta logo]()
$372
This Southwest deal was found by Cheapflights users on 5/7. 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 7/226:55 pm
STL
- SEA
1 stop7h 35m
Southwest
Tue 7/286:15 am
SEA
- STL
2 stops10h 10m
Southwest
Deal found 5/7![Southwest logo]()
$392
This American Airlines deal was found by Cheapflights users on 5/7. 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 6/195:19 pm
COU
- SEA
1 stop9h 40m
American Airlines
Mon 6/2212:49 am
SEA
- COU
1 stop8h 25m
American Airlines
Deal found 5/7![American Airlines logo]()
$404
This Alaska Airlines deal was found by Cheapflights users on 5/10. 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 5/304:12 pm
STL
- SEA
Nonstop4h 29m
Alaska Airlines
Sat 6/67:05 am
SEA
- STL
1 stop7h 32m
Alaska Airlines
Deal found 5/10![Alaska Airlines logo]()
$442
This Expedia deal was found by Cheapflights users on 5/11. 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.
Wed 5/279:45 am
UIN
- SEA
2 stops11h 09m
Multiple Airlines
Sun 5/318:10 am
SEA
- UIN
1 stop10h 50m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$612
This United Airlines deal was found by Cheapflights users on 5/8. 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 9/171:54 pm
JLN
- SEA
1 stop5h 51m
United Airlines
Mon 9/283:55 pm
SEA
- JLN
1 stop5h 59m
United Airlines
Deal found 5/8![United Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 5/7. 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 9/77:40 pm
MCI
- SEA
1 stop6h 21m
Delta
Mon 9/145:30 pm
SEA
- MCI
Nonstop3h 33m
Delta
Deal found 5/7![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 5/11. 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 9/246:00 am
STL
- SEA
2 stops8h 50m
Southwest
Sun 9/2710:30 pm
SEA
- STL
1 stop11h 05m
Southwest
Deal found 5/11![Southwest logo]()
$402
This American Airlines deal was found by Cheapflights users on 5/7. 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 5/236:43 pm
COU
- SEA
1 stop7h 41m
American Airlines
Wed 5/275:10 am
SEA
- COU
1 stop9h 39m
American Airlines
Deal found 5/7![American Airlines logo]()
$408
This Delta deal was found by Cheapflights users on 5/11. 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 6/302:55 pm
MCI
- SEA
1 stop5h 41m
Delta
Tue 7/145:30 pm
SEA
- MCI
Nonstop3h 30m
Delta
Deal found 5/11![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 5/9. 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 9/297:00 am
STL
- SEA
1 stop6h 00m
Southwest
Tue 10/67:35 am
SEA
- STL
2 stops9h 20m
Southwest
Deal found 5/9![Southwest logo]()
$402
This Alaska Airlines deal was found by Cheapflights users on 5/9. 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 7/267:56 pm
STL
- SEA
Nonstop4h 28m
Alaska Airlines
Tue 8/47:55 am
SEA
- STL
Nonstop3h 57m
Alaska Airlines
Deal found 5/9![Alaska Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 5/11. 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 8/188:00 am
STL
- SEA
2 stops13h 08m
United Airlines
Wed 8/1911:59 pm
SEA
- STL
1 stop8h 11m
United Airlines
Deal found 5/11![United Airlines logo]()
$434
This Southwest deal was found by Cheapflights users on 5/8. 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 9/122:25 pm
STL
- SEA
2 stops10h 30m
Southwest
Sun 9/2011:35 am
SEA
- STL
1 stop9h 30m
Southwest
Deal found 5/8![Southwest logo]()
$402
This Delta deal was found by Cheapflights users on 5/9. 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 6/292:55 pm
MCI
- SEA
1 stop5h 41m
Delta
Tue 7/76:05 am
SEA
- MCI
1 stop7h 09m
Delta
Deal found 5/9![Delta logo]()
$407
This Delta deal was found by Cheapflights users on 5/9. 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 6/253:55 pm
MCI
- SEA
1 stop10h 11m
Delta
Tue 6/302:55 pm
SEA
- MCI
1 stop7h 04m
Delta
Deal found 5/9![Delta logo]()
$407
This United Airlines deal was found by Cheapflights users on 5/11. 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 10/283:16 pm
COU
- SEA
1 stop9h 13m
United Airlines
Sat 10/3111:00 am
SEA
- COU
1 stop8h 20m
United Airlines
Deal found 5/11![United Airlines logo]()
$448
This Southwest deal was found by Cheapflights users on 5/11. 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 6/304:10 pm
MCI
- SEA
2 stops9h 00m
Southwest
Fri 7/105:35 pm
SEA
- MCI
1 stop6h 05m
Southwest
Deal found 5/11![Southwest logo]()
$408
This American Airlines deal was found by Cheapflights users on 5/10. 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 8/16:22 pm
COU
- SEA
1 stop8h 30m
American Airlines
Sat 8/86:00 am
SEA
- COU
1 stop9h 58m
American Airlines
Deal found 5/10![American Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 5/11. 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 6/305:37 pm
MCI
- SEA
1 stop8h 22m
Delta
Fri 7/312:35 pm
SEA
- MCI
1 stop9h 14m
Delta
Deal found 5/11![Delta logo]()
$407
This Southwest deal was found by Cheapflights users on 5/11. 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 8/235:30 pm
MCI
- SEA
1 stop6h 15m
Southwest
Wed 9/211:10 am
SEA
- MCI
2 stops8h 40m
Southwest
Deal found 5/11![Southwest logo]()
$412
This United Airlines deal was found by Cheapflights users on 5/7. 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 10/241:53 pm
JLN
- SEA
2 stops11h 33m
United Airlines
Tue 10/278:30 am
SEA
- JLN
1 stop6h 41m
United Airlines
Deal found 5/7![United Airlines logo]()
$460
This Expedia deal was found by Cheapflights users on 5/11. 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.
Mon 6/81:40 pm
IRK
- SEA
1 stop10h 50m
Multiple Airlines
Sun 6/149:28 pm
SEA
- IRK
2 stops13h 17m
Multiple Airlines
Deal found 5/11![Multiple Airlines logo]()
$644
This Alaska Airlines deal was found by Cheapflights users on 5/11. 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 6/103:56 pm
SGF
- SEA
1 stop9h 09m
Alaska Airlines
Wed 6/176:02 am
SEA
- SGF
1 stop7h 24m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$591
This Southwest deal was found by Cheapflights users on 5/11. 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 7/295:15 pm
MCI
- SEA
2 stops8h 15m
Southwest
Tue 8/411:05 pm
SEA
- MCI
1 stop7h 35m
Southwest
Deal found 5/11![Southwest logo]()
$412
This United Airlines deal was found by Cheapflights users on 5/11. 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 10/65:30 am
SGF
- SEA
1 stop6h 31m
United Airlines
Sun 10/115:00 am
SEA
- SGF
1 stop5h 56m
United Airlines
Deal found 5/11![United Airlines logo]()
$469
This Alaska Airlines deal was found by Cheapflights users on 5/10. 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 6/179:29 am
SGF
- SEA
2 stops13h 06m
Alaska Airlines
Wed 6/246:02 am
SEA
- SGF
1 stop7h 24m
Alaska Airlines
Deal found 5/10![Alaska Airlines logo]()
$596
This Southwest deal was found by Cheapflights users on 5/10. 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 6/115:25 pm
MCI
- SEA
1 stop9h 25m
Southwest
Tue 6/1610:55 am
SEA
- MCI
2 stops9h 05m
Southwest
Deal found 5/10![Southwest logo]()
$417
This American Airlines deal was found by Cheapflights users on 5/12. 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.
Wed 6/32:21 pm
SGF
- SEA
1 stop8h 12m
American Airlines
Wed 6/107:31 am
SEA
- SGF
1 stop8h 36m
American Airlines
Deal found 5/12![American Airlines logo]()
$617
Last-minute flights from Missouri to SeattleDiscover last-minute flight deals from Missouri to Seattle. Data last updated May 12, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Seattle. Data last updated May 12, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:08 pm
STL
- SEA
1 stop19h 53m
Frontier
Wed 6/37:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/12![Frontier logo]()
$261
This Trip.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Wed 6/37:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/7![Frontier logo]()
$256
This Super.com deal was found by Cheapflights users on 5/12. 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 5/298:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Mon 6/17:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/12![Frontier logo]()
$266
This Trip.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Mon 6/87:50 pm
SEA
- STL
1 stop21h 33m
Frontier
Deal found 5/9![Frontier logo]()
$251
This Gotogate deal was found by Cheapflights users on 5/7. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Thu 6/257:41 pm
SEA
- STL
1 stop21h 12m
Frontier
Deal found 5/7![Frontier logo]()
$260
This Mytrip deal was found by Cheapflights users on 5/7. 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 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Mon 6/298:12 pm
SEA
- STL
1 stop20h 39m
Frontier
Deal found 5/7![Frontier logo]()
$262
This Trip.com deal was found by Cheapflights users on 5/9. 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 6/28:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Thu 6/118:12 pm
SEA
- STL
1 stop15h 54m
Frontier
Deal found 5/9![Frontier logo]()
$257
This Mytrip deal was found by Cheapflights users on 5/7. 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.
Fri 6/59:06 pm
STL
- SEA
1 stop15h 30m
Frontier
Mon 6/88:20 pm
SEA
- STL
1 stop18h 45m
Frontier
Deal found 5/7![Frontier logo]()
$254
This Trip.com deal was found by Cheapflights users on 5/11. 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.
Mon 6/89:06 pm
STL
- SEA
1 stop15h 29m
Frontier
Mon 6/158:12 pm
SEA
- STL
1 stop20h 39m
Frontier
Deal found 5/11![Frontier logo]()
$271
This Trip.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:08 pm
STL
- SEA
1 stop15h 40m
Frontier
Fri 6/127:41 pm
SEA
- STL
1 stop21h 12m
Frontier
Deal found 5/8![Frontier logo]()
$258
This Trip.com deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/108:08 pm
STL
- SEA
1 stop15h 40m
Frontier
Wed 7/88:12 pm
SEA
- STL
1 stop15h 55m
Frontier
Deal found 5/11![Frontier logo]()
$264
This CheapOair deal was found by Cheapflights users on 5/9. 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.
Thu 6/117:38 pm
STL
- SEA
1 stop16h 10m
Frontier
Sun 6/147:41 pm
SEA
- STL
1 stop21h 12m
Frontier
Deal found 5/9![Frontier logo]()
$270
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 May 12, 2026.
Search for one-way flight options from Missouri to Seattle. Find affordable one-way fares based on user searches. Data last updated May 12, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/10. 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 6/28:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Deal found 5/10![Frontier logo]()
$100
This Super.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:46 pm
STL
- SEA
1 stop16h 49m
Frontier
Deal found 5/12![Frontier logo]()
$108
This Super.com deal was found by Cheapflights users on 5/12. 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.
Wed 6/177:46 pm
STL
- SEA
1 stop16h 49m
Frontier
Deal found 5/12![Frontier logo]()
$109
This Mytrip deal was found by Cheapflights users on 5/10. 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.
Tue 8/251:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/10![Frontier logo]()
$115
This Gotogate deal was found by Cheapflights users on 5/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:03 pm
STL
- SEA
1 stop17h 36m
Frontier
Deal found 5/10![Frontier logo]()
$116
This Trip.com deal was found by Cheapflights users on 5/8. 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 6/131:45 pm
MCI
- SEA
1 stop22h 03m
Frontier
Deal found 5/8![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 5/10. 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 6/18:08 pm
STL
- SEA
1 stop15h 58m
Frontier
Deal found 5/10![Frontier logo]()
$124
This Orbitz deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:17 pm
MCI
- SEA
1 stop21h 34m
Frontier
Deal found 5/11![Frontier logo]()
$125
This Trip.com deal was found by Cheapflights users on 5/11. 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.
Mon 6/89:06 pm
STL
- SEA
1 stop15h 29m
Frontier
Deal found 5/11![Frontier logo]()
$128
This Mytrip deal was found by Cheapflights users on 5/10. 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 8/311:50 pm
MCI
- SEA
1 stop22h 45m
Frontier
Deal found 5/10![Frontier logo]()
$129
This Trip.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/36:51 pm
STL
- SEA
1 stop17h 45m
Frontier
Deal found 5/7![Frontier logo]()
$129
This Booking.com deal was found by Cheapflights users on 5/11. 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.
Sat 7/181:45 pm
MCI
- SEA
1 stop22h 04m
Frontier
Deal found 5/11![Frontier logo]()
$130
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 May 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $238 (Trip.com) |
One-way from | $100 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $388 |
Good round-trip deal | $405 or less |
Good one-way deal | $228 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 2,558,603 searches. Data last updated May 12, 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 - SEA
STLSEA
Lambert-St Louis
Tue 8/18
5:10 am-10:01 am
1 stop6h 51m
Seattle/Tacoma Intl
Tue 8/25
8:40 am-4:34 pm
1 stop5h 54m
$279
Kansas CitySeattle
MCI - SEA
MCISEA
Kansas City
Mon 6/1
7:40 pm-12:10 am
1 stop6h 30m
Seattle/Tacoma Intl
Sat 6/6
5:30 pm-11:08 pm
Nonstop3h 38m
$372
JoplinSeattle
JLN - SEA
JLNSEA
Joplin
Thu 9/17
1:54 pm-5:45 pm
1 stop5h 51m
Seattle/Tacoma Intl
Mon 9/28
3:55 pm-11:54 pm
1 stop5h 59m
$381
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Wed 7/22
6:55 pm-12:30 am
1 stop7h 35m
Seattle/Tacoma Intl
Tue 7/28
6:15 am-6:25 pm
2 stops10h 10m
$392
Kansas CitySeattle
MCI - SEA
MCISEA
Kansas City
Mon 9/7
7:40 pm-12:01 am
1 stop6h 21m
Seattle/Tacoma Intl
Mon 9/14
5:30 pm-11:03 pm
Nonstop3h 33m
$397
Kansas CitySeattle
MCI - SEA
MCISEA
Kansas City
Tue 6/30
2:55 pm-6:36 pm
1 stop5h 41m
Seattle/Tacoma Intl
Tue 7/14
5:30 pm-11:00 pm
Nonstop3h 30m
$397
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Thu 9/24
6:00 am-12:50 pm
2 stops8h 50m
Seattle/Tacoma Intl
Sun 9/27
10:30 pm-11:35 am
1 stop11h 05m
$402
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Tue 9/29
7:00 am-11:00 am
1 stop6h 00m
Seattle/Tacoma Intl
Tue 10/6
7:35 am-6:55 pm
2 stops9h 20m
$402
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 9/12
2:25 pm-10:55 pm
2 stops10h 30m
Seattle/Tacoma Intl
Sun 9/20
11:35 am-11:05 pm
1 stop9h 30m
$402
ColumbiaSeattle
COU - SEA
COUSEA
Columbia Regional
Fri 6/19
5:19 pm-12:59 am
1 stop9h 40m
Seattle/Tacoma Intl
Mon 6/22
12:49 am-11:14 am
1 stop8h 25m
$404
Showing 1-10 of 60 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
COU-SEA
UIN-SEA
JLN-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
COU-SEA
UIN-SEA
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 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Missouri to Seattle?
Currently, March is the cheapest month in which you can book a flight from Missouri to Seattle (average of $80). Flying from Missouri to Seattle in July is currently the most expensive (average of $547). 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 May 12, 2026.
One of the essential ways to save on airfare from Missouri to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 17% on airfare.
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 May 9, 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.
How much does it cost to fly round-trip from Missouri to Seattle?
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
Tacoma
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Marysville
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Alternative routes for Missouri to Seattle
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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 May 12, 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 May 12, 2026.
Missouri to Seattle flights
Consider these flights traveling from Missouri to Seattle.
Top 7 airlines flying from Missouri to Seattle
Discover the top 7 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 2,558,603 searches. Data last updated May 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$283 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$113 | Average$249 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$152 | Average$371 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$169 | Average$341 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$178 | Average$429 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$188 | Average$517 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$196 | Average$464 | FlexibilityNo cancel fee | On-time75% |