$129+ Cheap flights from Montana to St. Louis (STL)
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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Apr 28 — May 51
Round-trip
1 adult, Economy
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Cheapest flights from Montana to St. LouisExplore the most affordable flight options available from Montana to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 29, 2026.
Explore the most affordable flight options available from Montana to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 29, 2026.
This Southwest deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Tue 6/22:30 pm
STL
- BZN
1 stop10h 45m
Southwest
Deal found 3/25![Southwest logo]()
$205
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/91:30 pm
BZN
- STL
1 stop9h 15m
Southwest
Tue 6/166:55 pm
STL
- BZN
1 stop6h 50m
Southwest
Deal found 3/26![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/172:53 pm
BZN
- STL
1 stop7h 43m
Delta
Sun 4/196:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/23![Delta logo]()
$264
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Tue 4/288:35 am
STL
- BZN
1 stop7h 05m
Southwest
Deal found 3/27![Southwest logo]()
$271
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Fri 5/86:45 pm
STL
- BZN
1 stop5h 15m
Southwest
Deal found 3/26![Southwest logo]()
$274
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:20 am
BZN
- STL
1 stop6h 57m
Delta
Tue 4/146:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/26![Delta logo]()
$278
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:20 am
BZN
- STL
1 stop6h 57m
Delta
Sun 4/126:00 am
STL
- BZN
1 stop8h 35m
Delta
Deal found 3/24![Delta logo]()
$299
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/264:29 pm
BZN
- STL
1 stop6h 28m
United Airlines
Mon 7/65:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 3/28![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:35 pm
BZN
- STL
1 stop4h 55m
Delta
Mon 5/117:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 3/26![Delta logo]()
$308
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:33 pm
FCA
- STL
1 stop5h 10m
United Airlines
Sun 8/95:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 3/28![United Airlines logo]()
$316
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 pm
BIL
- STL
1 stop4h 57m
United Airlines
Tue 6/95:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 3/25![United Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/24:08 pm
HLN
- STL
1 stop6h 51m
Alaska Airlines
Sun 12/66:41 am
STL
- HLN
1 stop9h 50m
Alaska Airlines
Deal found 3/27![Alaska Airlines logo]()
$349
Best flights from Montana to St. LouisDiscover carefully curated flight deals from Montana to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 29, 2026.
Discover carefully curated flight deals from Montana to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 29, 2026.
This Southwest deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Tue 6/22:30 pm
STL
- BZN
1 stop10h 45m
Southwest
Deal found 3/25![Southwest logo]()
$205
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:00 am
BZN
- STL
1 stop6h 46m
United Airlines
Tue 5/265:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 3/25![United Airlines logo]()
$264
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:20 am
BZN
- STL
1 stop6h 57m
Delta
Tue 4/146:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/26![Delta logo]()
$278
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/234:13 pm
MSO
- STL
1 stop6h 46m
Alaska Airlines
Mon 9/286:41 am
STL
- MSO
1 stop9h 42m
Alaska Airlines
Deal found 3/27![Alaska Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/14:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Fri 5/86:45 pm
STL
- BZN
1 stop5h 15m
Southwest
Deal found 3/26![Southwest logo]()
$274
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/264:29 pm
BZN
- STL
1 stop6h 28m
United Airlines
Mon 7/65:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 3/28![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:34 pm
BZN
- STL
1 stop4h 51m
Delta
Thu 4/166:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/26![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:22 pm
BZN
- STL
1 stop6h 28m
United Airlines
Sun 9/208:52 am
STL
- BZN
1 stop7h 23m
United Airlines
Deal found 3/27![United Airlines logo]()
$315
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:33 pm
FCA
- STL
1 stop5h 10m
United Airlines
Sun 8/95:10 am
STL
- FCA
1 stop5h 51m
United Airlines
Deal found 3/28![United Airlines logo]()
$316
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/233:27 pm
MSO
- STL
1 stop6h 34m
Delta
Mon 9/286:59 pm
STL
- MSO
1 stop6h 25m
Delta
Deal found 3/25![Delta logo]()
$349
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:35 am
BZN
- STL
1 stop5h 35m
Southwest
Sun 6/78:25 am
STL
- BZN
1 stop12h 15m
Southwest
Deal found 3/26![Southwest logo]()
$377
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/171:40 pm
MSO
- STL
2 stops8h 34m
Delta
Tue 4/215:35 pm
STL
- MSO
2 stops7h 41m
Delta
Deal found 3/25![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:55 pm
MSO
- STL
1 stop7h 04m
Alaska Airlines
Sun 5/107:00 am
STL
- MSO
1 stop8h 59m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Tue 4/214:30 pm
STL
- MSO
1 stop6h 00m
United Airlines
Deal found 3/25![United Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/144:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Mon 5/185:15 pm
STL
- BZN
1 stop6h 45m
Southwest
Deal found 3/25![Southwest logo]()
$397
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/76:24 am
BIL
- STL
2 stops10h 42m
Delta
Sat 7/113:57 pm
STL
- BIL
1 stop5h 02m
Delta
Deal found 3/26![Delta logo]()
$404
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:20 am
BZN
- STL
2 stops10h 25m
Southwest
Fri 4/175:15 pm
STL
- BZN
1 stop6h 45m
Southwest
Deal found 3/26![Southwest logo]()
$419
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:15 am
BIL
- STL
1 stop7h 02m
Delta
Tue 4/1411:42 am
STL
- BIL
2 stops9h 24m
Delta
Deal found 3/25![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/142:25 pm
BIL
- STL
1 stop5h 18m
United Airlines
Sun 7/265:33 pm
STL
- BIL
1 stop5h 47m
United Airlines
Deal found 3/25![United Airlines logo]()
$414
This Alaska Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:08 pm
HLN
- STL
1 stop6h 51m
Alaska Airlines
Sun 9/208:30 am
STL
- HLN
2 stops32h 01m
Alaska Airlines
Deal found 3/27![Alaska Airlines logo]()
$619
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:13 am
FCA
- STL
2 stops9h 06m
Delta
Sun 8/95:42 pm
STL
- FCA
1 stop6h 56m
Delta
Deal found 3/28![Delta logo]()
$428
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/182:25 pm
HLN
- STL
1 stop5h 29m
United Airlines
Wed 4/228:54 am
STL
- HLN
1 stop5h 45m
United Airlines
Deal found 3/25![United Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/26:15 am
MSO
- STL
1 stop7h 13m
United Airlines
Tue 5/54:06 pm
STL
- MSO
1 stop6h 24m
United Airlines
Deal found 3/27![United Airlines logo]()
$439
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:15 am
BIL
- STL
1 stop7h 02m
Delta
Mon 4/133:25 pm
STL
- BIL
2 stops7h 59m
Delta
Deal found 3/27![Delta logo]()
$445
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:00 am
BIL
- STL
2 stops7h 46m
United Airlines
Tue 6/95:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 3/25![United Airlines logo]()
$466
This United Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:25 pm
BIL
- STL
1 stop5h 18m
United Airlines
Sun 7/124:48 pm
STL
- BIL
1 stop5h 29m
United Airlines
Deal found 3/26![United Airlines logo]()
$507
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/145:30 am
BIL
- STL
2 stops10h 46m
Delta
Sat 5/165:36 pm
STL
- BIL
1 stop6h 38m
Delta
Deal found 3/24![Delta logo]()
$567
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/126:33 am
FCA
- STL
2 stops9h 00m
Alaska Airlines
Fri 6/125:33 pm
STL
- FCA
2 stops19h 57m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$970
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:15 am
BTM
- STL
1 stop5h 18m
United Airlines
Tue 6/24:48 pm
STL
- BTM
1 stop6h 42m
United Airlines
Deal found 3/25![United Airlines logo]()
$586
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/305:13 am
FCA
- STL
1 stop7h 19m
Delta
Wed 12/28:50 am
STL
- FCA
2 stops9h 55m
Delta
Deal found 3/24![Delta logo]()
$649
Last-minute flights from Montana to St. LouisDiscover last-minute flight deals from Montana to St. Louis. Data last updated March 29, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to St. Louis. Data last updated March 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/85:20 am
BZN
- STL
1 stop6h 57m
Delta
Sun 4/126:00 am
STL
- BZN
1 stop8h 35m
Delta
Deal found 3/24![Delta logo]()
$299
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/86:30 pm
BZN
- STL
1 stop4h 51m
Delta
Fri 4/106:12 pm
STL
- BZN
1 stop5h 58m
Delta
Deal found 3/26![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/105:20 am
BZN
- STL
1 stop6h 57m
Delta
Tue 4/146:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/26![Delta logo]()
$278
This Southwest deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:15 am
BZN
- STL
1 stop12h 30m
Southwest
Tue 4/141:15 pm
STL
- BZN
2 stops9h 40m
Southwest
Deal found 3/26![Southwest logo]()
$356
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:04 pm
MSO
- STL
1 stop5h 17m
Delta
Tue 4/146:45 pm
STL
- MSO
1 stop6h 31m
Delta
Deal found 3/26![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/134:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Tue 4/142:30 pm
STL
- BZN
2 stops8h 25m
Southwest
Deal found 3/24![Southwest logo]()
$312
This Delta deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:34 pm
BZN
- STL
1 stop4h 51m
Delta
Thu 4/166:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/26![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/172:53 pm
BZN
- STL
1 stop7h 43m
Delta
Sun 4/196:00 am
STL
- BZN
1 stop8h 36m
Delta
Deal found 3/23![Delta logo]()
$264
This United Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/172:38 pm
MSO
- STL
1 stop5h 16m
United Airlines
Tue 4/214:30 pm
STL
- MSO
1 stop6h 00m
United Airlines
Deal found 3/25![United Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/176:18 pm
MSO
- STL
1 stop5h 07m
Delta
Tue 4/215:35 pm
STL
- MSO
2 stops7h 41m
Delta
Deal found 3/25![Delta logo]()
$354
This Southwest deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/174:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Sun 4/192:10 pm
STL
- BZN
2 stops9h 35m
Southwest
Deal found 3/23![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/274:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Tue 4/288:35 am
STL
- BZN
1 stop7h 05m
Southwest
Deal found 3/27![Southwest logo]()
$271
One-way flights from Montana to St. LouisSearch for one-way flight options from Montana to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 29, 2026.
Search for one-way flight options from Montana to St. Louis. Find affordable one-way fares based on user searches. Data last updated March 29, 2026.
This American Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 5/274:16 pm
BZN
- STL
1 stop6h 43m
American Airlines
Deal found 3/23![American Airlines logo]()
$129
This Delta deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/176:35 pm
BZN
- STL
1 stop4h 55m
Delta
Deal found 3/28![Delta logo]()
$136
This American Airlines deal was found by Cheapflights users on 3/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:45 pm
FCA
- STL
1 stop6h 09m
American Airlines
Deal found 3/24![American Airlines logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:34 am
BIL
- STL
1 stop30h 32m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 5/2710:28 am
BZN
- STL
2 stops31h 08m
Multiple Airlines
Deal found 3/23![Multiple Airlines logo]()
$173
This Alaska Airlines deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/13:55 pm
MSO
- STL
1 stop7h 04m
Alaska Airlines
Deal found 3/25![Alaska Airlines logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1710:25 am
BZN
- STL
2 stops36h 56m
Multiple Airlines
Deal found 3/28![Multiple Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/25:20 am
MSO
- STL
2 stops8h 09m
Delta
Deal found 3/25![Delta logo]()
$180
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:16 pm
BZN
- STL
2 stops14h 25m
United Airlines
Deal found 3/28![United Airlines logo]()
$186
This Delta deal was found by Cheapflights users on 3/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/153:53 pm
BZN
- STL
1 stop6h 30m
Delta
Deal found 3/25![Delta logo]()
$220
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/131:25 pm
FCA
- STL
1 stop5h 54m
American Airlines
Deal found 3/27![American Airlines logo]()
$220
This United Airlines deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:25 am
MSO
- STL
2 stops13h 18m
United Airlines
Deal found 3/28![United Airlines logo]()
$225
Find flight deals from Montana to St. Louis
Keep the following information in mind while searching for Montana to St. Louis flight deals. Data was last updated March 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $205 (Southwest) |
One-way from | $129 (American Airlines) |
Popular in | March |
Cheapest in | February |
Average price | $590 |
Cheapflights Fare Finder
Customize your flight search to find flights from Montana to St. Louis 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 March 29, 2026.
Use the filters below to find and compare flights from Montana to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 5/28
4:20 pm-11:50 pm
1 stop6h 30m
Lambert-St Louis
Tue 6/2
2:30 pm-12:15 am
1 stop10h 45m
$205
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 5/21
8:00 am-3:46 pm
1 stop6h 46m
Lambert-St Louis
Tue 5/26
5:10 am-9:37 am
1 stop5h 27m
$264
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Fri 5/1
4:20 pm-11:50 pm
1 stop6h 30m
Lambert-St Louis
Fri 5/8
6:45 pm-11:00 pm
1 stop5h 15m
$274
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Fri 4/10
5:20 am-1:17 pm
1 stop6h 57m
Lambert-St Louis
Tue 4/14
6:00 am-1:36 pm
1 stop8h 36m
$278
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Fri 6/26
4:29 pm-11:57 pm
1 stop6h 28m
Lambert-St Louis
Mon 7/6
5:10 am-9:37 am
1 stop5h 27m
$303
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 9/17
4:22 pm-11:50 pm
1 stop6h 28m
Lambert-St Louis
Sun 9/20
8:52 am-3:15 pm
1 stop7h 23m
$315
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Sat 5/16
2:33 pm-8:43 pm
1 stop5h 10m
Lambert-St Louis
Sun 8/9
5:10 am-10:01 am
1 stop5h 51m
$316
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Mon 4/13
6:34 pm-12:25 am
1 stop4h 51m
Lambert-St Louis
Thu 4/16
6:00 am-1:36 pm
1 stop8h 36m
$329
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Wed 9/23
4:13 pm-11:59 pm
1 stop6h 46m
Lambert-St Louis
Mon 9/28
6:41 am-3:23 pm
1 stop9h 42m
$349
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Wed 9/23
3:27 pm-11:01 pm
1 stop6h 34m
Lambert-St Louis
Mon 9/28
6:59 pm-12:24 am
1 stop6h 25m
$349
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Montana to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Montana with our price prediction graph.
BZN-STL
MSO-STL
FCA-STL
BIL-STL
HLN-STL
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 Montana to St. Louis
USMT-STL
BZN-STL
MSO-STL
FCA-STL
BIL-STL
What is the cheapest month to book a flight from Montana to St. Louis?
Currently, December is the cheapest month in which you can book a flight from Montana to St. Louis (average of $176). Flying from Montana to St. Louis in March is currently the most expensive (average of $362). 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.
How much does it cost to fly round-trip from Montana to St. Louis?
Related info for your journey
Find useful and relevant information for your journey from Montana to St. Louis. 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 St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
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Montana and St. Louis flights
Browse other Montana and St. Louis flight options. Last updated on March 29, 2026.
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Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 29, 2026.
Montana to St. Louis flights
Consider these flights traveling from Montana to St. Louis.
Top 3 airlines flying from Montana to St. Louis
Discover the top 3 airlines that operate flights from Montana to St. Louis. 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 March 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$128 | Average$424 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$210 | Average$438 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$249 | Average$499 | FlexibilityNo cancel fee | On-time69% |