$136+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Jun 11 — Jun 181
Round-trip
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 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 May 12, 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 May 12, 2026.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:35 pm
BZN
- STL
1 stop4h 55m
Delta
Tue 6/27:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 5/8![Delta logo]()
$281
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:00 pm
BZN
- STL
1 stop7h 06m
Delta
Sat 6/135:00 pm
STL
- BZN
1 stop6h 08m
Delta
Deal found 5/12![Delta logo]()
$285
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 5/2211:48 am
BZN
- STL
1 stop8h 54m
American Airlines
Tue 5/268:36 am
STL
- BZN
1 stop8h 17m
American Airlines
Deal found 5/7![American Airlines logo]()
$299
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.
Mon 6/84:25 pm
BZN
- STL
1 stop6h 04m
United Airlines
Fri 6/125:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 5/7![United Airlines logo]()
$310
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:38 pm
BZN
- STL
1 stop5h 19m
United Airlines
Thu 6/115:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 5/10![United Airlines logo]()
$311
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.
Thu 5/282:19 pm
BZN
- STL
1 stop8h 40m
Delta
Mon 6/17:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 5/7![Delta logo]()
$320
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:51 pm
BZN
- STL
1 stop5h 06m
United Airlines
Mon 8/35:33 pm
STL
- BZN
1 stop6h 10m
United Airlines
Deal found 5/10![United Airlines logo]()
$327
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:35 am
BZN
- STL
1 stop6h 57m
Delta
Mon 6/15:36 pm
STL
- BZN
1 stop7h 08m
Delta
Deal found 5/8![Delta logo]()
$329
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 6/31:57 pm
BZN
- STL
1 stop8h 57m
Alaska Airlines
Sat 6/64:12 pm
STL
- BZN
1 stop7h 30m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$339
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.
Thu 6/44:30 pm
BZN
- STL
2 stops7h 05m
Southwest
Sun 6/75:35 pm
STL
- BZN
1 stop6h 20m
Southwest
Deal found 5/7![Southwest logo]()
$345
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:29 pm
MSO
- STL
1 stop5h 34m
American Airlines
Mon 9/287:44 am
STL
- MSO
1 stop5h 46m
American Airlines
Deal found 5/11![American Airlines logo]()
$349
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.
Thu 8/136:27 pm
MSO
- STL
1 stop5h 14m
Delta
Tue 9/16:00 am
STL
- MSO
2 stops12h 23m
Delta
Deal found 5/11![Delta logo]()
$354
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 May 12, 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 May 12, 2026.
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.
Fri 8/214:22 pm
BZN
- STL
1 stop6h 28m
United Airlines
Sun 8/235:10 am
STL
- BZN
1 stop5h 35m
United Airlines
Deal found 5/7![United Airlines logo]()
$281
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.
Wed 5/275:35 am
BZN
- STL
1 stop6h 57m
Delta
Mon 6/15:36 pm
STL
- BZN
1 stop7h 08m
Delta
Deal found 5/11![Delta logo]()
$299
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 6/31:57 pm
BZN
- STL
1 stop8h 57m
Alaska Airlines
Sat 6/64:12 pm
STL
- BZN
1 stop7h 30m
Alaska Airlines
Deal found 5/10![Alaska Airlines logo]()
$339
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:28 pm
MSO
- STL
1 stop8h 31m
American Airlines
Wed 6/36:35 am
STL
- MSO
1 stop10h 39m
American Airlines
Deal found 5/11![American Airlines logo]()
$349
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.
Fri 7/316:10 am
BZN
- STL
2 stops7h 35m
Southwest
Wed 8/512:45 pm
STL
- BZN
2 stops8h 15m
Southwest
Deal found 5/10![Southwest logo]()
$454
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:51 pm
BZN
- STL
1 stop5h 06m
United Airlines
Mon 8/35:33 pm
STL
- BZN
1 stop6h 10m
United Airlines
Deal found 5/10![United Airlines logo]()
$327
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 5/282:19 pm
BZN
- STL
1 stop8h 40m
Delta
Mon 6/15:36 pm
STL
- BZN
1 stop7h 08m
Delta
Deal found 5/9![Delta logo]()
$329
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 6/25:30 am
MSO
- STL
1 stop7h 02m
Delta
Wed 6/31:27 pm
STL
- MSO
2 stops11h 55m
Delta
Deal found 5/11![Delta logo]()
$354
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.
Wed 5/275:33 pm
BZN
- STL
1 stop5h 24m
United Airlines
Sat 5/305:29 pm
STL
- BZN
1 stop6h 14m
United Airlines
Deal found 5/8![United Airlines logo]()
$375
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:27 pm
MSO
- STL
2 stops12h 41m
Delta
Tue 9/18:50 am
STL
- MSO
1 stop6h 47m
Delta
Deal found 5/10![Delta logo]()
$354
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.
Wed 9/236:10 pm
MSO
- STL
1 stop5h 26m
Delta
Mon 9/282:18 pm
STL
- MSO
2 stops11h 06m
Delta
Deal found 5/11![Delta logo]()
$354
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.
Wed 5/275:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Sat 5/306:00 am
STL
- FCA
1 stop6h 29m
United Airlines
Deal found 5/7![United Airlines logo]()
$398
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/44:43 pm
HLN
- STL
2 stops15h 07m
Alaska Airlines
Sun 6/77:41 pm
STL
- HLN
1 stop21h 25m
Alaska Airlines
Deal found 5/7![Alaska Airlines logo]()
$495
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:35 am
MSO
- STL
1 stop6h 58m
Delta
Sun 8/28:48 am
STL
- MSO
2 stops9h 57m
Delta
Deal found 5/10![Delta logo]()
$354
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.
Thu 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Mon 6/295:36 pm
STL
- BIL
1 stop6h 24m
Delta
Deal found 5/7![Delta logo]()
$359
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/62:25 pm
BIL
- STL
1 stop5h 32m
United Airlines
Fri 6/125:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 5/9![United Airlines logo]()
$446
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:49 pm
FCA
- STL
1 stop6h 27m
American Airlines
Mon 7/66:55 am
STL
- FCA
1 stop10h 14m
American Airlines
Deal found 5/9![American Airlines logo]()
$639
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 5/266:30 am
BIL
- STL
1 stop7h 01m
Delta
Sat 5/305:00 pm
STL
- BIL
1 stop6h 52m
Delta
Deal found 5/11![Delta logo]()
$369
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.
Thu 6/184:10 pm
BIL
- STL
1 stop6h 47m
United Airlines
Tue 6/235:10 am
STL
- BIL
1 stop5h 25m
United Airlines
Deal found 5/7![United Airlines logo]()
$504
This Alaska 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/224:43 pm
HLN
- STL
2 stops22h 54m
Alaska Airlines
Tue 5/266:00 am
STL
- HLN
1 stop11h 06m
Alaska Airlines
Deal found 5/7![Alaska Airlines logo]()
$726
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.
Sat 6/66:19 pm
BIL
- STL
2 stops14h 13m
Delta
Fri 6/125:36 pm
STL
- BIL
1 stop6h 56m
Delta
Deal found 5/9![Delta logo]()
$423
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 8/256:34 pm
BIL
- STL
1 stop5h 07m
Delta
Thu 8/2712:52 pm
STL
- BIL
2 stops10h 43m
Delta
Deal found 5/11![Delta logo]()
$440
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.
Sat 6/206:00 am
BZN
- STL
1 stop6h 40m
Delta
Sun 7/58:00 am
STL
- BZN
1 stop7h 35m
Delta
Deal found 5/7![Delta logo]()
$448
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.
Thu 6/410:15 am
BTM
- STL
1 stop12h 42m
United Airlines
Sun 6/75:10 am
STL
- BTM
1 stop18h 20m
United Airlines
Deal found 5/7![United Airlines logo]()
$656
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.
Sat 6/1310:15 am
BTM
- STL
2 stops24h 56m
United Airlines
Wed 6/175:10 am
STL
- BTM
1 stop18h 20m
United Airlines
Deal found 5/8![United Airlines logo]()
$660
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Tue 6/233:57 pm
STL
- BIL
2 stops7h 52m
Delta
Deal found 5/10![Delta logo]()
$489
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.
Fri 7/2410:15 am
BTM
- STL
1 stop12h 42m
United Airlines
Sun 7/265:10 am
STL
- BTM
1 stop18h 20m
United Airlines
Deal found 5/11![United Airlines logo]()
$725
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 9/2811:35 am
BIL
- STL
2 stops10h 26m
Delta
Fri 10/23:50 pm
STL
- BIL
1 stop4h 47m
Delta
Deal found 5/7![Delta logo]()
$560
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.
Fri 6/1210:15 am
BTM
- STL
1 stop9h 55m
United Airlines
Wed 6/175:10 am
STL
- BTM
1 stop18h 20m
United Airlines
Deal found 5/8![United Airlines logo]()
$754
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/126:10 pm
BTM
- STL
1 stop5h 33m
Delta
Wed 6/176:00 am
STL
- BTM
2 stops11h 57m
Delta
Deal found 5/8![Delta logo]()
$652
Last-minute flights from Montana to St. LouisDiscover last-minute flight deals from Montana to St. Louis. Data last updated May 12, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to St. Louis. Data last updated May 12, 2026 and is based on user searches.
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 5/2211:48 am
BZN
- STL
1 stop8h 54m
American Airlines
Tue 5/268:36 am
STL
- BZN
1 stop8h 17m
American Airlines
Deal found 5/7![American Airlines logo]()
$299
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/275:35 am
BZN
- STL
1 stop6h 57m
Delta
Mon 6/15:36 pm
STL
- BZN
1 stop7h 08m
Delta
Deal found 5/8![Delta logo]()
$329
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:35 pm
BZN
- STL
1 stop4h 55m
Delta
Tue 6/27:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 5/8![Delta logo]()
$281
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.
Thu 5/282:19 pm
BZN
- STL
1 stop8h 40m
Delta
Mon 6/17:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 5/7![Delta logo]()
$320
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:28 pm
MSO
- STL
1 stop8h 31m
American Airlines
Wed 6/36:35 am
STL
- MSO
1 stop10h 39m
American Airlines
Deal found 5/11![American Airlines logo]()
$349
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 6/25:30 am
MSO
- STL
1 stop7h 02m
Delta
Wed 6/31:27 pm
STL
- MSO
2 stops11h 55m
Delta
Deal found 5/11![Delta logo]()
$354
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 6/31:57 pm
BZN
- STL
1 stop8h 57m
Alaska Airlines
Sat 6/64:12 pm
STL
- BZN
1 stop7h 30m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$339
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.
Thu 6/44:30 pm
BZN
- STL
2 stops7h 05m
Southwest
Sun 6/75:35 pm
STL
- BZN
1 stop6h 20m
Southwest
Deal found 5/7![Southwest logo]()
$345
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/61:00 pm
BZN
- STL
1 stop7h 06m
Delta
Sat 6/135:00 pm
STL
- BZN
1 stop6h 08m
Delta
Deal found 5/12![Delta logo]()
$285
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.
Mon 6/84:25 pm
BZN
- STL
1 stop6h 04m
United Airlines
Fri 6/125:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 5/7![United Airlines logo]()
$310
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:38 pm
BZN
- STL
1 stop5h 19m
United Airlines
Thu 6/115:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 5/10![United Airlines logo]()
$311
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.
Thu 6/186:40 pm
BIL
- STL
1 stop5h 03m
Delta
Mon 6/295:36 pm
STL
- BIL
1 stop6h 24m
Delta
Deal found 5/7![Delta logo]()
$359
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 May 12, 2026.
Search for one-way flight options from Montana to St. Louis. Find affordable one-way fares based on user searches. Data last updated May 12, 2026.
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.
Sat 6/64:17 pm
BZN
- STL
1 stop6h 42m
American Airlines
Deal found 5/12![American Airlines logo]()
$136
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.
Thu 6/112:50 pm
BZN
- STL
2 stops8h 45m
Southwest
Deal found 5/7![Southwest logo]()
$141
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/115:28 pm
FCA
- STL
1 stop5h 29m
United Airlines
Deal found 5/9![United Airlines logo]()
$149
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.
Wed 8/124:08 pm
FCA
- STL
1 stop5h 52m
United Airlines
Deal found 5/7![United Airlines logo]()
$154
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/112:15 pm
MSO
- STL
1 stop8h 44m
American Airlines
Deal found 5/9![American Airlines logo]()
$175
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.
Thu 8/135:04 pm
FCA
- STL
1 stop5h 36m
United Airlines
Deal found 5/11![United Airlines logo]()
$177
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:00 pm
BZN
- STL
1 stop6h 16m
American Airlines
Deal found 5/9![American Airlines logo]()
$180
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.
Tue 9/86:55 am
BZN
- STL
1 stop9h 55m
Southwest
Deal found 5/8![Southwest logo]()
$199
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/122:15 pm
MSO
- STL
1 stop8h 44m
American Airlines
Deal found 5/9![American Airlines logo]()
$200
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.
Thu 9/31:35 pm
BZN
- STL
2 stops8h 30m
Southwest
Deal found 5/8![Southwest logo]()
$210
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.
Sun 8/233:32 pm
BZN
- STL
1 stop24h 31m
Alaska Airlines
Deal found 5/11![Alaska Airlines logo]()
$215
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:24 am
MSO
- STL
2 stops31h 59m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$216
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 May 12, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $281 (United Airlines) |
One-way from | $136 (American Airlines) |
Popular in | May |
Cheapest in | February |
Average price | $646 |
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 May 12, 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
Fri 8/21
4:22 pm-11:50 pm
1 stop6h 28m
Lambert-St Louis
Sun 8/23
5:10 am-9:45 am
1 stop5h 35m
$281
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Wed 5/27
5:35 am-1:32 pm
1 stop6h 57m
Lambert-St Louis
Mon 6/1
5:36 pm-11:44 pm
1 stop7h 08m
$299
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 7/30
5:51 pm-11:57 pm
1 stop5h 06m
Lambert-St Louis
Mon 8/3
5:33 pm-10:43 pm
1 stop6h 10m
$327
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 5/28
2:19 pm-11:59 pm
1 stop8h 40m
Lambert-St Louis
Mon 6/1
5:36 pm-11:44 pm
1 stop7h 08m
$329
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Wed 6/3
1:57 pm-11:54 pm
1 stop8h 57m
Lambert-St Louis
Sat 6/6
4:12 pm-10:42 pm
1 stop7h 30m
$339
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Tue 6/2
2:28 pm-11:59 pm
1 stop8h 31m
Lambert-St Louis
Wed 6/3
6:35 am-4:14 pm
1 stop10h 39m
$349
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Tue 6/2
5:30 am-1:32 pm
1 stop7h 02m
Lambert-St Louis
Wed 6/3
1:27 pm-12:22 am
2 stops11h 55m
$354
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Thu 8/13
6:27 pm-8:08 am
2 stops12h 41m
Lambert-St Louis
Tue 9/1
8:50 am-2:37 pm
1 stop6h 47m
$354
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Wed 9/23
6:10 pm-12:36 am
1 stop5h 26m
Lambert-St Louis
Mon 9/28
2:18 pm-12:24 am
2 stops11h 06m
$354
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Wed 7/29
5:35 am-1:33 pm
1 stop6h 58m
Lambert-St Louis
Sun 8/2
8:48 am-5:45 pm
2 stops9h 57m
$354
Showing 1-10 of 58 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
HLN-STL
BIL-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
HLN-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 $128). Flying from Montana to St. Louis in March is currently the most expensive (average of $333). 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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Alternative routes for Montana to St. Louis
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Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
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Montana and St. Louis flights
Browse other Montana and St. Louis flight options. Last updated on May 12, 2026.
Popular flight searches
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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 May 12, 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 May 12, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$164 | Average$414 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$210 | Average$388 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$249 | Average$498 | FlexibilityNo cancel fee | On-time69% |