$66+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SEA
Mar 13 — Mar 201
1 adult, Economy
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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 February 11, 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 February 11, 2026.
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:27 pm
STL
- SEA
1 stop9h 34m
Delta
Sat 5/166:10 am
SEA
- STL
1 stop8h 39m
Delta
Deal found 2/8![Delta logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Fri 4/248:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Sun 4/266:57 pm
SEA
- STL
1 stop22h 15m
Frontier
Deal found 2/10![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Thu 5/146:57 pm
SEA
- STL
1 stop22h 15m
Frontier
Deal found 2/8![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Sun 4/192:15 pm
MCI
- SEA
1 stop26h 50m
Frontier
Wed 4/226:57 pm
SEA
- MCI
1 stop16h 33m
Frontier
Deal found 2/10![Frontier logo]()
$182
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:36 pm
STL
- SEA
1 stop7h 48m
American Airlines
Wed 3/111:37 pm
SEA
- STL
1 stop8h 07m
American Airlines
Deal found 2/8![American Airlines logo]()
$184
This Delta deal was found by Cheapflights users on 2/9. 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 4/302:20 pm
STL
- SEA
1 stop6h 10m
Delta
Mon 5/411:14 pm
SEA
- STL
1 stop8h 28m
Delta
Deal found 2/9![Delta logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/47:00 am
STL
- SEA
Nonstop4h 35m
Hawaiian Airlines
Sat 4/116:02 pm
SEA
- STL
Nonstop3h 57m
Hawaiian Airlines
Deal found 2/8![Hawaiian Airlines logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:41 pm
MCI
- SEA
1 stop16h 14m
Frontier
Fri 3/1312:24 pm
SEA
- MCI
1 stop29h 31m
Frontier
Deal found 2/9![Frontier logo]()
$193
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Sun 5/176:57 pm
SEA
- STL
1 stop22h 15m
Frontier
Deal found 2/8![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/78:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Thu 5/146:57 pm
SEA
- STL
1 stop22h 15m
Frontier
Deal found 2/8![Frontier logo]()
$195
This Alaska Airlines deal was found by Cheapflights users on 2/9. 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.
Wed 4/87:00 am
STL
- SEA
Nonstop4h 35m
Alaska Airlines
Sat 4/189:24 am
SEA
- STL
Nonstop4h 00m
Alaska Airlines
Deal found 2/9![Alaska Airlines logo]()
$197
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:59 pm
STL
- SEA
1 stop6h 13m
Delta
Mon 5/1811:59 pm
SEA
- STL
1 stop6h 47m
Delta
Deal found 2/8![Delta logo]()
$198
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 February 11, 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 February 11, 2026.
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:45 pm
STL
- SEA
1 stop7h 14m
Delta
Sun 4/264:36 pm
SEA
- STL
1 stop5h 49m
Delta
Deal found 2/8![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 2/8. 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.
Mon 3/95:30 am
STL
- SEA
1 stop9h 10m
Southwest
Tue 3/107:00 am
SEA
- STL
2 stops10h 55m
Southwest
Deal found 2/8![Southwest logo]()
$203
This United Airlines deal was found by Cheapflights users on 2/7. 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.
Sun 3/15:54 am
MCI
- SEA
1 stop5h 55m
United Airlines
Tue 3/315:00 am
SEA
- MCI
1 stop5h 52m
United Airlines
Deal found 2/7![United Airlines logo]()
$237
This Alaska Airlines deal was found by Cheapflights users on 2/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
STL
- SEA
Nonstop4h 32m
Alaska Airlines
Sat 5/169:48 am
SEA
- STL
Nonstop4h 02m
Alaska Airlines
Deal found 2/8![Alaska Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 4/1312:21 pm
SGF
- SEA
2 stops23h 06m
Multiple Airlines
Thu 4/169:35 pm
SEA
- SGF
1 stop11h 56m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$287
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:05 pm
SGF
- SEA
1 stop8h 25m
American Airlines
Sun 4/2611:55 pm
SEA
- SGF
1 stop7h 29m
American Airlines
Deal found 2/8![American Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:00 pm
STL
- SEA
1 stop7h 01m
Delta
Mon 5/1811:59 pm
SEA
- STL
1 stop6h 47m
Delta
Deal found 2/8![Delta logo]()
$177
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:00 pm
STL
- SEA
1 stop7h 01m
Delta
Sat 5/166:10 am
SEA
- STL
1 stop8h 39m
Delta
Deal found 2/8![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 2/7. 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 5/96:00 am
MCI
- SEA
1 stop5h 40m
United Airlines
Mon 5/1111:48 pm
SEA
- MCI
1 stop8h 45m
United Airlines
Deal found 2/7![United Airlines logo]()
$237
This Alaska Airlines deal was found by Cheapflights users on 2/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:00 am
STL
- SEA
Nonstop4h 32m
Alaska Airlines
Fri 5/151:01 pm
SEA
- STL
Nonstop3h 59m
Alaska Airlines
Deal found 2/8![Alaska Airlines logo]()
$247
This Delta deal was found by Cheapflights users on 2/9. 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.
Wed 6/106:59 pm
STL
- SEA
1 stop7h 02m
Delta
Tue 6/1611:53 pm
SEA
- STL
1 stop6h 47m
Delta
Deal found 2/9![Delta logo]()
$209
This United Airlines deal was found by Cheapflights users on 2/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/26:00 am
MCI
- SEA
1 stop5h 46m
United Airlines
Sun 4/1210:35 pm
SEA
- MCI
1 stop8h 12m
United Airlines
Deal found 2/10![United Airlines logo]()
$257
This Alaska Airlines deal was found by Cheapflights users on 2/8. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/65:16 pm
MCI
- SEA
1 stop7h 02m
Alaska Airlines
Mon 3/98:21 am
SEA
- MCI
Nonstop3h 34m
Alaska Airlines
Deal found 2/8![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:00 am
MCI
- SEA
Nonstop4h 00m
Delta
Sun 5/175:57 pm
SEA
- MCI
Nonstop3h 40m
Delta
Deal found 2/8![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/196:12 pm
STL
- SEA
1 stop7h 51m
Delta
Tue 3/314:55 pm
SEA
- STL
1 stop5h 26m
Delta
Deal found 2/10![Delta logo]()
$219
This United Airlines deal was found by Cheapflights users on 2/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:18 pm
MCI
- SEA
1 stop7h 38m
United Airlines
Mon 4/2711:59 pm
SEA
- MCI
1 stop6h 48m
United Airlines
Deal found 2/9![United Airlines logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Sun 4/121:09 pm
SGF
- SEA
2 stops24h 28m
Multiple Airlines
Thu 4/169:35 pm
SEA
- SGF
1 stop11h 56m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 2/7. 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.
Wed 6/106:59 pm
STL
- SEA
1 stop7h 02m
Delta
Sat 6/1311:53 pm
SEA
- STL
1 stop6h 47m
Delta
Deal found 2/7![Delta logo]()
$234
This United Airlines deal was found by Cheapflights users on 2/8. 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.
Fri 4/106:30 pm
SGF
- SEA
1 stop7h 49m
United Airlines
Fri 4/1711:59 pm
SEA
- SGF
1 stop8h 40m
United Airlines
Deal found 2/8![United Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/27:55 am
MCI
- SEA
Nonstop4h 05m
Delta
Sun 4/125:50 pm
SEA
- MCI
Nonstop3h 26m
Delta
Deal found 2/10![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/147:45 am
MCI
- SEA
Nonstop4h 09m
Delta
Sun 4/196:40 pm
SEA
- MCI
Nonstop3h 31m
Delta
Deal found 2/10![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 2/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:02 pm
SGF
- SEA
1 stop7h 57m
United Airlines
Wed 3/1111:59 pm
SEA
- SGF
1 stop8h 47m
United Airlines
Deal found 2/9![United Airlines logo]()
$334
This Expedia deal was found by Cheapflights users on 2/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/239:50 am
UIN
- SEA
1 stop12h 26m
Multiple Airlines
Thu 2/266:00 am
SEA
- UIN
1 stop8h 00m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 2/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/77:59 pm
STL
- SEA
1 stop6h 13m
Delta
Mon 5/1111:59 pm
SEA
- STL
1 stop8h 28m
Delta
Deal found 2/10![Delta logo]()
$244
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Fri 4/178:56 am
JLN
- SEA
1 stop9h 41m
United Airlines
Mon 4/203:48 pm
SEA
- JLN
1 stop5h 56m
United Airlines
Deal found 2/11![United Airlines logo]()
$347
This Expedia deal was found by Cheapflights users on 2/8. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/239:50 am
UIN
- SEA
1 stop12h 26m
Multiple Airlines
Fri 2/278:00 am
SEA
- UIN
1 stop10h 50m
Multiple Airlines
Deal found 2/8![Multiple Airlines logo]()
$474
This Delta deal was found by Cheapflights users on 2/7. 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 6/17:59 pm
STL
- SEA
1 stop6h 11m
Delta
Mon 6/811:53 pm
SEA
- STL
1 stop6h 47m
Delta
Deal found 2/7![Delta logo]()
$253
This United Airlines deal was found by Cheapflights users on 2/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:15 am
COU
- SEA
2 stops11h 57m
United Airlines
Sat 2/2811:59 pm
SEA
- COU
1 stop8h 34m
United Airlines
Deal found 2/9![United Airlines logo]()
$354
This Expedia deal was found by Cheapflights users on 2/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:10 pm
IRK
- SEA
1 stop8h 06m
Multiple Airlines
Sun 3/17:55 am
SEA
- IRK
1 stop8h 55m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$495
This Delta deal was found by Cheapflights users on 2/9. 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 4/67:55 am
MCI
- SEA
Nonstop4h 05m
Delta
Fri 4/105:50 pm
SEA
- MCI
Nonstop3h 26m
Delta
Deal found 2/9![Delta logo]()
$267
Last-minute flights from Missouri to SeattleDiscover last-minute flight deals from Missouri to Seattle. Data last updated February 11, 2026 and is based on user searches.
Discover last-minute flight deals from Missouri to Seattle. Data last updated February 11, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:36 pm
STL
- SEA
1 stop7h 48m
American Airlines
Tue 3/36:44 am
SEA
- STL
1 stop6h 44m
American Airlines
Deal found 2/9![American Airlines logo]()
$198
This American Airlines deal was found by Cheapflights users on 2/7. 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 2/276:36 pm
STL
- SEA
1 stop7h 48m
American Airlines
Sat 2/2812:07 am
SEA
- STL
1 stop7h 56m
American Airlines
Deal found 2/7![American Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:41 pm
MCI
- SEA
1 stop16h 14m
Frontier
Fri 3/1312:24 pm
SEA
- MCI
1 stop29h 31m
Frontier
Deal found 2/9![Frontier logo]()
$193
This American Airlines deal was found by Cheapflights users on 2/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:36 pm
STL
- SEA
1 stop7h 48m
American Airlines
Mon 3/910:08 pm
SEA
- STL
1 stop9h 32m
American Airlines
Deal found 2/9![American Airlines logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Wed 3/44:39 pm
MCI
- SEA
1 stop21h 22m
Multiple Airlines
Tue 3/176:24 pm
SEA
- MCI
2 stops20h 45m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$211
This American Airlines deal was found by Cheapflights users on 2/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/76:36 pm
STL
- SEA
1 stop7h 48m
American Airlines
Wed 3/111:37 pm
SEA
- STL
1 stop8h 07m
American Airlines
Deal found 2/8![American Airlines logo]()
$184
This Southwest deal was found by Cheapflights users on 2/8. 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.
Mon 3/95:30 am
STL
- SEA
1 stop9h 10m
Southwest
Tue 3/107:00 am
SEA
- STL
2 stops10h 55m
Southwest
Deal found 2/8![Southwest logo]()
$203
This Delta deal was found by Cheapflights users on 2/9. 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 3/95:25 pm
STL
- SEA
1 stop8h 13m
Delta
Mon 3/161:32 pm
SEA
- STL
1 stop8h 49m
Delta
Deal found 2/9![Delta logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/98:38 pm
MCI
- SEA
2 stops46h 31m
Frontier
Wed 3/2510:08 pm
SEA
- MCI
1 stop9h 54m
Frontier
Deal found 2/8![Frontier logo]()
$213
This Delta deal was found by Cheapflights users on 2/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/107:55 am
MCI
- SEA
Nonstop4h 03m
Delta
Wed 3/255:50 pm
SEA
- MCI
Nonstop3h 26m
Delta
Deal found 2/8![Delta logo]()
$207
This American Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 3/1011:46 am
STL
- SEA
1 stop9h 39m
American Airlines
Sat 3/1411:59 pm
SEA
- STL
1 stop6h 56m
American Airlines
Deal found 2/10![American Airlines logo]()
$209
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Wed 3/118:12 pm
STL
- SEA
1 stop17h 07m
Frontier
Mon 3/236:54 pm
SEA
- STL
2 stops36h 55m
Frontier
Deal found 2/10![Frontier logo]()
$211
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 February 11, 2026.
Search for one-way flight options from Missouri to Seattle. Find affordable one-way fares based on user searches. Data last updated February 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 5/42:15 pm
MCI
- SEA
1 stop21h 12m
Frontier
Deal found 2/10![Frontier logo]()
$66
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:15 pm
MCI
- SEA
1 stop21h 12m
Frontier
Deal found 2/9![Frontier logo]()
$71
This CheapOair deal was found by Cheapflights users on 2/7. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:41 pm
MCI
- SEA
1 stop16h 14m
Frontier
Deal found 2/7![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 2/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/162:15 pm
MCI
- SEA
1 stop26h 50m
Frontier
Deal found 2/7![Frontier logo]()
$77
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 5/48:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Deal found 2/10![Frontier logo]()
$77
This American Airlines deal was found by Cheapflights users on 2/10. 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.
Tue 3/34:13 pm
STL
- SEA
1 stop7h 11m
American Airlines
Deal found 2/10![American Airlines logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/252:51 pm
MCI
- SEA
1 stop20h 36m
Frontier
Deal found 2/8![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Fri 5/88:12 pm
STL
- SEA
1 stop15h 15m
Frontier
Deal found 2/10![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 2/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/82:15 pm
MCI
- SEA
1 stop21h 12m
Frontier
Deal found 2/8![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 4/272:15 pm
MCI
- SEA
1 stop21h 12m
Frontier
Deal found 2/10![Frontier logo]()
$86
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Thu 4/232:15 pm
MCI
- SEA
1 stop21h 12m
Frontier
Deal found 2/10![Frontier logo]()
$89
This Delta deal was found by Cheapflights users on 2/7. 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 3/96:12 pm
STL
- SEA
1 stop7h 49m
Delta
Deal found 2/7![Delta logo]()
$89
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 February 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $177 (Delta) |
One-way from | $66 (Kiwi.com) |
Popular in | July |
Cheapest in | February |
Average price | $242 |
Good round-trip deal | $292 or less |
Good one-way deal | $160 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 February 11, 2026.
Use the filters below to find and compare flights from Missouri to Seattle that are best for you.
Fly from
Missouri
Fly to
Seattle
Route
Depart
Return
Price
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Thu 4/23
6:45 pm-11:59 pm
1 stop7h 14m
Seattle/Tacoma Intl
Sun 4/26
4:36 pm-12:25 am
1 stop5h 49m
$177
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 5/9
5:00 pm-10:01 pm
1 stop7h 01m
Seattle/Tacoma Intl
Mon 5/18
11:59 pm-8:46 am
1 stop6h 47m
$177
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Sat 5/9
5:00 pm-10:01 pm
1 stop7h 01m
Seattle/Tacoma Intl
Sat 5/16
6:10 am-4:49 pm
1 stop8h 39m
$177
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Mon 3/9
5:30 am-12:40 pm
1 stop9h 10m
Seattle/Tacoma Intl
Tue 3/10
7:00 am-7:55 pm
2 stops10h 55m
$203
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Wed 6/10
6:59 pm-12:01 am
1 stop7h 02m
Seattle/Tacoma Intl
Tue 6/16
11:53 pm-8:40 am
1 stop6h 47m
$209
Kansas CitySeattle
MCI - SEA
MCISEA
Kansas City
Tue 5/12
7:00 am-9:00 am
Nonstop4h 00m
Seattle/Tacoma Intl
Sun 5/17
5:57 pm-11:37 pm
Nonstop3h 40m
$217
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Thu 3/19
6:12 pm-12:03 am
1 stop7h 51m
Seattle/Tacoma Intl
Tue 3/31
4:55 pm-12:21 am
1 stop5h 26m
$219
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Wed 6/10
6:59 pm-12:01 am
1 stop7h 02m
Seattle/Tacoma Intl
Sat 6/13
11:53 pm-8:40 am
1 stop6h 47m
$234
Kansas CitySeattle
MCI - SEA
MCISEA
Kansas City
Sun 3/1
5:54 am-9:49 am
1 stop5h 55m
Seattle/Tacoma Intl
Tue 3/31
5:00 am-12:52 pm
1 stop5h 52m
$237
St. LouisSeattle
STL - SEA
STLSEA
Lambert-St Louis
Tue 5/5
7:00 am-9:32 am
Nonstop4h 32m
Seattle/Tacoma Intl
Sat 5/16
9:48 am-3:50 pm
Nonstop4h 02m
$237
Showing 1-10 of 60 results
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
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
MCI-SEA
STL-SEA
SGF-SEA
UIN-SEA
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 $112). Flying from Missouri to Seattle in August is currently the most expensive (average of $195). 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 February 11, 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 16% 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 February 7, 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. Sunday mornings 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 locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
Browse thousands of different options on Cheapflights for your next trip
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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 February 11, 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 February 11, 2026.
Missouri to Seattle flights
Consider these flights traveling from Missouri to Seattle.
Top 8 airlines flying from Missouri to Seattle
Discover the top 8 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 February 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$273 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$100 | Average$223 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$111 | Average$208 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$138 | Average$358 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$176 | Average$384 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$176 | Average$479 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$178 | Average$423 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$206 | Average$476 | FlexibilityNo cancel fee | On-time75% |