$117+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Jul 27 — Aug 31
Round-trip
1 adult, Economy
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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 June 27, 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 June 27, 2026.
This American Airlines deal was found by Cheapflights users on 6/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:26 pm
FCA
- STL
1 stop7h 17m
American Airlines
Fri 9/258:30 am
STL
- FCA
1 stop7h 03m
American Airlines
Deal found 6/25![American Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 9/223:26 pm
FCA
- STL
1 stop7h 17m
American Airlines
Mon 9/285:01 am
STL
- FCA
2 stops10h 32m
American Airlines
Deal found 6/23![American Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 6/26. 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 9/296:33 pm
BIL
- STL
1 stop5h 11m
Delta
Sat 10/33:52 pm
STL
- BIL
1 stop5h 15m
Delta
Deal found 6/26![Delta logo]()
$319
This Delta deal was found by Cheapflights users on 6/26. 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 11/1311:35 am
BIL
- STL
2 stops11h 04m
Delta
Fri 11/2010:45 am
STL
- BIL
2 stops10h 03m
Delta
Deal found 6/26![Delta logo]()
$329
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:55 am
BZN
- STL
1 stop7h 10m
Southwest
Sat 9/268:55 am
STL
- BZN
1 stop7h 40m
Southwest
Deal found 6/22![Southwest logo]()
$347
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 9/232:30 pm
BZN
- STL
1 stop5h 08m
United Airlines
Sat 9/268:00 am
STL
- BZN
2 stops8h 28m
United Airlines
Deal found 6/22![United Airlines logo]()
$352
This Delta deal was found by Cheapflights users on 6/23. 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.
Tue 10/205:45 am
BZN
- STL
1 stop6h 38m
Delta
Fri 10/237:55 pm
STL
- BZN
1 stop5h 15m
Delta
Deal found 6/23![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 6/26. 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.
Sat 7/115:20 am
BIL
- STL
1 stop7h 13m
Delta
Wed 7/155:36 pm
STL
- BIL
1 stop6h 54m
Delta
Deal found 6/26![Delta logo]()
$369
This Delta deal was found by Cheapflights users on 6/23. 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.
Mon 10/193:15 pm
BZN
- STL
1 stop7h 03m
Delta
Fri 10/237:30 am
STL
- BZN
1 stop5h 53m
Delta
Deal found 6/23![Delta logo]()
$382
This Delta deal was found by Cheapflights users on 6/25. 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 9/236:35 am
FCA
- STL
1 stop7h 37m
Delta
Sat 9/265:00 pm
STL
- FCA
1 stop6h 54m
Delta
Deal found 6/25![Delta logo]()
$393
This Southwest deal was found by Cheapflights users on 6/24. 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.
Sat 9/1212:50 pm
BZN
- STL
1 stop5h 55m
Southwest
Fri 9/183:45 pm
STL
- BZN
2 stops7h 40m
Southwest
Deal found 6/24![Southwest logo]()
$396
This American Airlines deal was found by Cheapflights users on 6/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 am
BIL
- STL
2 stops12h 44m
American Airlines
Sat 10/311:01 am
STL
- BIL
2 stops12h 09m
American Airlines
Deal found 6/26![American Airlines logo]()
$396
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 June 27, 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 June 27, 2026.
This American Airlines deal was found by Cheapflights users on 6/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:26 pm
FCA
- STL
1 stop7h 17m
American Airlines
Fri 9/258:30 am
STL
- FCA
1 stop7h 03m
American Airlines
Deal found 6/25![American Airlines logo]()
$309
This Delta deal was found by Cheapflights users on 6/26. 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 9/295:30 am
BIL
- STL
2 stops10h 17m
Delta
Sat 10/35:00 pm
STL
- BIL
1 stop6h 41m
Delta
Deal found 6/26![Delta logo]()
$324
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 9/232:30 pm
BZN
- STL
1 stop5h 08m
United Airlines
Sat 9/268:00 am
STL
- BZN
2 stops8h 28m
United Airlines
Deal found 6/22![United Airlines logo]()
$352
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:00 pm
BZN
- STL
2 stops7h 10m
Southwest
Sat 9/262:05 pm
STL
- BZN
2 stops8h 10m
Southwest
Deal found 6/22![Southwest logo]()
$383
This Alaska Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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.
Mon 12/73:00 pm
BZN
- STL
1 stop7h 59m
Alaska Airlines
Tue 12/83:24 pm
STL
- BZN
1 stop9h 35m
Alaska Airlines
Deal found 6/22![Alaska Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 6/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:46 pm
FCA
- STL
2 stops35h 54m
Multiple Airlines
Fri 9/2512:46 pm
STL
- FCA
1 stop7h 57m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$457
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Tue 9/223:26 pm
FCA
- STL
1 stop7h 17m
American Airlines
Mon 9/285:01 am
STL
- FCA
2 stops10h 32m
American Airlines
Deal found 6/23![American Airlines logo]()
$314
This Delta deal was found by Cheapflights users on 6/26. 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 11/136:25 pm
BIL
- STL
1 stop5h 11m
Delta
Fri 11/2010:45 am
STL
- BIL
2 stops10h 03m
Delta
Deal found 6/26![Delta logo]()
$324
This Delta deal was found by Cheapflights users on 6/26. 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 10/205:45 am
BZN
- STL
1 stop6h 38m
Delta
Fri 10/237:55 pm
STL
- BZN
1 stop5h 15m
Delta
Deal found 6/26![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/15:00 am
BIL
- STL
1 stop6h 40m
United Airlines
Sat 9/54:40 pm
STL
- BIL
1 stop5h 20m
United Airlines
Deal found 6/24![United Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 6/25. 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.
Tue 10/2011:16 am
BZN
- STL
1 stop11h 43m
Alaska Airlines
Fri 10/234:40 pm
STL
- BZN
2 stops20h 21m
Alaska Airlines
Deal found 6/25![Alaska Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 6/25. 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 10/315:00 am
BIL
- STL
1 stop6h 37m
United Airlines
Wed 11/44:40 pm
STL
- BIL
1 stop5h 24m
United Airlines
Deal found 6/25![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 6/26. 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 9/236:35 am
FCA
- STL
1 stop7h 37m
Delta
Thu 9/245:47 pm
STL
- FCA
1 stop6h 56m
Delta
Deal found 6/26![Delta logo]()
$393
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 9/28:37 am
BTM
- STL
1 stop6h 57m
United Airlines
Sat 9/54:40 pm
STL
- BTM
1 stop6h 46m
United Airlines
Deal found 6/22![United Airlines logo]()
$414
This Alaska Airlines deal was found by Cheapflights users on 6/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:41 pm
MSO
- STL
1 stop21h 56m
Alaska Airlines
Tue 9/16:35 am
STL
- MSO
1 stop6h 48m
Alaska Airlines
Deal found 6/23![Alaska Airlines logo]()
$472
This Delta deal was found by Cheapflights users on 6/25. 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.
Tue 9/226:00 pm
FCA
- STL
1 stop5h 44m
Delta
Thu 9/245:47 pm
STL
- FCA
1 stop6h 56m
Delta
Deal found 6/25![Delta logo]()
$393
This United Airlines deal was found by Cheapflights users on 6/25. 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 11/310:00 am
BTM
- STL
1 stop5h 43m
United Airlines
Sat 11/74:40 pm
STL
- BTM
1 stop6h 51m
United Airlines
Deal found 6/25![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 6/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:15 am
HLN
- STL
1 stop5h 25m
United Airlines
Sat 9/54:40 pm
STL
- HLN
1 stop5h 50m
United Airlines
Deal found 6/23![United Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 6/26. 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 9/225:30 am
MSO
- STL
1 stop7h 00m
Delta
Thu 9/246:55 pm
STL
- MSO
1 stop6h 23m
Delta
Deal found 6/26![Delta logo]()
$431
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 7/236:27 pm
MSO
- STL
1 stop5h 14m
Delta
Mon 7/277:55 pm
STL
- MSO
1 stop5h 33m
Delta
Deal found 6/22![Delta logo]()
$431
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Mon 12/72:37 pm
BZN
- STL
2 stops7h 32m
United Airlines
Tue 12/85:00 am
STL
- BZN
1 stop7h 33m
United Airlines
Deal found 6/26![United Airlines logo]()
$434
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 9/15:00 pm
STL
- MSO
1 stop7h 12m
Delta
Deal found 6/22![Delta logo]()
$431
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 9/27:15 am
FCA
- STL
1 stop10h 24m
United Airlines
Sat 9/54:40 pm
STL
- FCA
1 stop5h 41m
United Airlines
Deal found 6/22![United Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 6/26. 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 9/216:17 pm
MSO
- STL
1 stop5h 27m
Delta
Thu 9/246:55 pm
STL
- MSO
1 stop6h 23m
Delta
Deal found 6/26![Delta logo]()
$431
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/216:00 pm
BIL
- STL
1 stop4h 57m
United Airlines
Tue 7/284:48 pm
STL
- BIL
1 stop5h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$451
This Delta deal was found by Cheapflights users on 6/26. 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 8/146:27 pm
MSO
- STL
1 stop5h 14m
Delta
Tue 9/15:00 pm
STL
- MSO
1 stop7h 12m
Delta
Deal found 6/26![Delta logo]()
$445
This United Airlines deal was found by Cheapflights users on 6/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/126:15 am
HLN
- STL
1 stop5h 25m
United Airlines
Tue 8/188:40 am
STL
- HLN
2 stops13h 50m
United Airlines
Deal found 6/23![United Airlines logo]()
$485
This Delta deal was found by Cheapflights users on 6/26. 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 9/216:17 pm
MSO
- STL
1 stop5h 27m
Delta
Sat 9/266:15 am
STL
- MSO
1 stop9h 27m
Delta
Deal found 6/26![Delta logo]()
$468
This United Airlines deal was found by Cheapflights users on 6/26. 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 11/32:27 pm
MSO
- STL
1 stop5h 07m
United Airlines
Wed 11/48:58 am
STL
- MSO
1 stop5h 34m
United Airlines
Deal found 6/26![United Airlines logo]()
$521
This Delta deal was found by Cheapflights users on 6/24. 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 8/296:20 am
FCA
- STL
1 stop7h 27m
Delta
Fri 9/115:47 pm
STL
- FCA
1 stop6h 56m
Delta
Deal found 6/24![Delta logo]()
$474
Last-minute flights from Montana to St. LouisDiscover last-minute flight deals from Montana to St. Louis. Data last updated June 27, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to St. Louis. Data last updated June 27, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/23. 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.
Mon 6/2911:27 am
BZN
- STL
1 stop4h 19m
Delta
Thu 7/28:00 am
STL
- BZN
1 stop8h 15m
Delta
Deal found 6/23![Delta logo]()
$509
This Delta deal was found by Cheapflights users on 6/23. 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.
Thu 7/26:55 am
FCA
- STL
1 stop7h 21m
Delta
Sun 7/56:21 am
STL
- FCA
1 stop5h 52m
Delta
Deal found 6/23![Delta logo]()
$429
This Delta deal was found by Cheapflights users on 6/26. 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.
Sat 7/115:20 am
BIL
- STL
1 stop7h 13m
Delta
Wed 7/155:36 pm
STL
- BIL
1 stop6h 54m
Delta
Deal found 6/26![Delta logo]()
$369
This United Airlines deal was found by Cheapflights users on 6/25. 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 7/216:00 pm
BIL
- STL
1 stop4h 57m
United Airlines
Tue 7/284:48 pm
STL
- BIL
1 stop5h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$451
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/224:29 pm
BZN
- STL
1 stop6h 28m
United Airlines
Thu 7/305:10 am
STL
- BZN
1 stop5h 27m
United Airlines
Deal found 6/24![United Airlines logo]()
$404
This Southwest deal was found by Cheapflights users on 6/24. 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.
Wed 7/221:30 pm
BZN
- STL
2 stops9h 25m
Southwest
Thu 7/307:45 pm
STL
- BZN
1 stop6h 30m
Southwest
Deal found 6/24![Southwest logo]()
$490
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 7/236:27 pm
MSO
- STL
1 stop5h 14m
Delta
Mon 7/277:55 pm
STL
- MSO
1 stop5h 33m
Delta
Deal found 6/22![Delta logo]()
$431
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/235:56 pm
BIL
- STL
2 stops23h 19m
Multiple Airlines
Sun 7/267:10 pm
STL
- BIL
1 stop14h 59m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$450
This United Airlines deal was found by Cheapflights users on 6/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/236:00 pm
BIL
- STL
1 stop4h 57m
United Airlines
Sun 7/264:48 pm
STL
- BIL
1 stop5h 29m
United Airlines
Deal found 6/24![United Airlines logo]()
$471
This American Airlines deal was found by Cheapflights users on 6/23. 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.
Fri 7/245:03 pm
BZN
- STL
1 stop6h 13m
American Airlines
Sun 7/265:32 am
STL
- BZN
1 stop6h 15m
American Airlines
Deal found 6/23![American Airlines logo]()
$450
This Southwest deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 7/246:10 am
BZN
- STL
2 stops7h 35m
Southwest
Sun 7/265:45 am
STL
- BZN
1 stop4h 40m
Southwest
Deal found 6/22![Southwest logo]()
$451
This Delta deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” 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 7/315:55 am
MSO
- STL
1 stop27h 33m
Delta
Tue 8/47:45 pm
STL
- MSO
1 stop5h 33m
Delta
Deal found 6/22![Delta logo]()
$508
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 June 27, 2026.
Search for one-way flight options from Montana to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:06 pm
BZN
- STL
1 stop19h 44m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$117
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:39 pm
FCA
- STL
1 stop25h 11m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$123
This Delta deal was found by Cheapflights users on 6/25. 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.
Tue 8/186:20 am
FCA
- STL
1 stop7h 50m
Delta
Deal found 6/25![Delta logo]()
$155
This American Airlines deal was found by Cheapflights users on 6/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:15 pm
BZN
- STL
1 stop6h 27m
American Airlines
Deal found 6/25![American Airlines logo]()
$174
This Southwest deal was found by Cheapflights users on 6/25. 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 10/84:15 pm
BZN
- STL
1 stop6h 30m
Southwest
Deal found 6/25![Southwest logo]()
$187
This American Airlines deal was found by Cheapflights users on 6/24. 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.
Sun 8/236:26 am
BZN
- STL
1 stop7h 19m
American Airlines
Deal found 6/24![American Airlines logo]()
$196
This Delta deal was found by Cheapflights users on 6/25. 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.
Tue 9/156:17 pm
MSO
- STL
1 stop5h 27m
Delta
Deal found 6/25![Delta logo]()
$216
This Kiwi.com deal was found by Cheapflights users on 6/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1410:00 am
BIL
- STL
2 stops36h 59m
Multiple Airlines
Deal found 6/25![Multiple Airlines logo]()
$217
This Southwest deal was found by Cheapflights users on 6/24. 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.
Sun 8/236:30 am
BZN
- STL
2 stops10h 05m
Southwest
Deal found 6/24![Southwest logo]()
$225
This Southwest deal was found by Cheapflights users on 6/25. 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.
Tue 8/118:30 am
BZN
- STL
2 stops7h 15m
Southwest
Deal found 6/25![Southwest logo]()
$235
This United Airlines deal was found by Cheapflights users on 6/26. 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.
Wed 8/127:00 am
BIL
- STL
1 stop4h 40m
United Airlines
Deal found 6/26![United Airlines logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 6/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/95:53 pm
BIL
- STL
2 stops23h 22m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$243
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 June 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $309 (American Airlines) |
One-way from | $117 (Kiwi.com) |
Popular in | May |
Cheapest in | February |
Average price | $398 |
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 June 27, 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
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Tue 9/22
3:26 pm-11:43 pm
1 stop7h 17m
Lambert-St Louis
Fri 9/25
8:30 am-2:33 pm
1 stop7h 03m
$309
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Tue 9/22
3:26 pm-11:43 pm
1 stop7h 17m
Lambert-St Louis
Mon 9/28
5:01 am-2:33 pm
2 stops10h 32m
$314
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Tue 9/29
5:30 am-4:47 pm
2 stops10h 17m
Lambert-St Louis
Sat 10/3
5:00 pm-10:41 pm
1 stop6h 41m
$324
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Fri 11/13
6:25 pm-12:36 am
1 stop5h 11m
Lambert-St Louis
Fri 11/20
10:45 am-7:48 pm
2 stops10h 03m
$324
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Wed 9/23
2:30 pm-8:38 pm
1 stop5h 08m
Lambert-St Louis
Sat 9/26
8:00 am-3:28 pm
2 stops8h 28m
$352
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Tue 10/20
5:45 am-1:23 pm
1 stop6h 38m
Lambert-St Louis
Fri 10/23
7:55 pm-12:10 am
1 stop5h 15m
$369
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Wed 9/23
2:00 pm-10:10 pm
2 stops7h 10m
Lambert-St Louis
Sat 9/26
2:05 pm-9:15 pm
2 stops8h 10m
$383
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Wed 9/23
6:35 am-3:12 pm
1 stop7h 37m
Lambert-St Louis
Thu 9/24
5:47 pm-11:43 pm
1 stop6h 56m
$393
KalispellSt. Louis
FCA - STL
FCASTL
Kalispell Glacier Park
Tue 9/22
6:00 pm-12:44 am
1 stop5h 44m
Lambert-St Louis
Thu 9/24
5:47 pm-11:43 pm
1 stop6h 56m
$393
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Tue 9/1
5:00 am-12:40 pm
1 stop6h 40m
Lambert-St Louis
Sat 9/5
4:40 pm-9:00 pm
1 stop5h 20m
$409
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
BIL-STL
FCA-STL
MSO-STL
BTM-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
BIL-STL
FCA-STL
MSO-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
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
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Montana and St. Louis flights
Browse other Montana and St. Louis flight options. Last updated on June 27, 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 June 27, 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 June 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$164 | Average$420 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$210 | Average$328 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$249 | Average$505 | FlexibilityNo cancel fee | On-time69% |