$120+ 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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — STL
Mar 11 — Mar 181
1 adult, Economy
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Find cheap flights from Montana to St. Louis with Cheapflights
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Montana to St. Louis
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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 February 9, 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 February 9, 2026.
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:41 pm
BZN
- STL
1 stop4h 45m
United Airlines
Tue 3/38:41 am
STL
- BZN
1 stop5h 55m
United Airlines
Deal found 2/8![United Airlines logo]()
$225
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/274:30 pm
BZN
- STL
1 stop6h 04m
United Airlines
Mon 3/302:40 pm
STL
- BZN
1 stop7h 52m
United Airlines
Deal found 2/6![United Airlines logo]()
$241
This Delta deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:59 am
BZN
- STL
1 stop4h 33m
Delta
Sun 5/36:45 pm
STL
- BZN
1 stop6h 24m
Delta
Deal found 2/8![Delta logo]()
$288
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 9/288:50 am
STL
- MSO
1 stop6h 47m
Delta
Deal found 2/6![Delta logo]()
$289
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/252:41 pm
BZN
- STL
1 stop4h 45m
United Airlines
Sat 2/284:30 pm
STL
- BZN
1 stop5h 37m
United Airlines
Deal found 2/5![United Airlines logo]()
$305
This Delta deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:29 pm
BZN
- STL
1 stop5h 01m
Delta
Mon 5/117:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 2/8![Delta logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/276:23 am
MSO
- STL
1 stop6h 28m
Alaska Airlines
Mon 3/27:00 am
STL
- MSO
2 stops30h 59m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$331
This Alaska Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 6/87:59 pm
BZN
- STL
1 stop18h 51m
Alaska Airlines
Sat 6/207:30 pm
STL
- BZN
1 stop16h 05m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/217:30 am
MSO
- STL
1 stop6h 24m
Delta
Wed 2/257:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/216:15 am
MSO
- STL
1 stop5h 59m
United Airlines
Wed 2/257:41 am
STL
- MSO
2 stops9h 28m
United Airlines
Deal found 2/6![United Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:34 pm
MSO
- STL
1 stop4h 52m
United Airlines
Mon 3/24:30 pm
STL
- MSO
1 stop6h 27m
United Airlines
Deal found 2/5![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/236:10 pm
MSO
- STL
1 stop5h 15m
Delta
Sat 3/77:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$379
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 February 9, 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 February 9, 2026.
This Delta deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:59 am
BZN
- STL
1 stop4h 33m
Delta
Sun 5/36:45 pm
STL
- BZN
1 stop6h 24m
Delta
Deal found 2/8![Delta logo]()
$288
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/252:41 pm
BZN
- STL
1 stop4h 45m
United Airlines
Sat 2/284:30 pm
STL
- BZN
1 stop5h 37m
United Airlines
Deal found 2/5![United Airlines logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/276:23 am
MSO
- STL
1 stop6h 28m
Alaska Airlines
Mon 3/27:00 am
STL
- MSO
2 stops30h 59m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$331
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 5/86:29 pm
BZN
- STL
1 stop5h 01m
Delta
Mon 5/117:59 pm
STL
- BZN
1 stop5h 00m
Delta
Deal found 2/5![Delta logo]()
$288
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/216:15 am
MSO
- STL
1 stop5h 59m
United Airlines
Wed 2/257:41 am
STL
- MSO
2 stops9h 28m
United Airlines
Deal found 2/6![United Airlines logo]()
$344
This Delta deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/106:30 pm
BZN
- STL
1 stop4h 51m
Delta
Sun 4/126:29 am
STL
- BZN
1 stop7h 37m
Delta
Deal found 2/8![Delta logo]()
$319
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:34 pm
MSO
- STL
1 stop4h 52m
United Airlines
Mon 3/24:30 pm
STL
- MSO
1 stop6h 27m
United Airlines
Deal found 2/5![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/217:30 am
MSO
- STL
1 stop6h 24m
Delta
Wed 2/257:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 5/187:21 pm
BIL
- STL
1 stop22h 39m
Alaska Airlines
Thu 5/286:20 pm
STL
- BIL
1 stop21h 34m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/236:10 pm
MSO
- STL
1 stop5h 15m
Delta
Sat 3/77:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/252:25 pm
HLN
- STL
1 stop5h 01m
United Airlines
Sat 2/284:30 pm
STL
- HLN
1 stop5h 46m
United Airlines
Deal found 2/6![United Airlines logo]()
$419
This Expedia deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/47:53 pm
FCA
- STL
1 stop16h 58m
Alaska Airlines
Wed 3/117:00 am
STL
- FCA
1 stop17h 57m
Alaska Airlines
Deal found 2/6![Alaska Airlines logo]()
$481
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 5/186:20 pm
BIL
- STL
1 stop5h 10m
Delta
Thu 5/281:50 pm
STL
- BIL
2 stops10h 13m
Delta
Deal found 2/6![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 5/185:51 pm
BIL
- STL
2 stops26h 17m
United Airlines
Thu 5/289:23 am
STL
- BIL
2 stops8h 53m
United Airlines
Deal found 2/6![United Airlines logo]()
$487
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/43:20 pm
FCA
- STL
1 stop7h 03m
Delta
Wed 3/116:32 am
STL
- FCA
2 stops11h 43m
Delta
Deal found 2/6![Delta logo]()
$434
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/2110:00 am
BTM
- STL
1 stop9h 26m
United Airlines
Wed 2/256:00 pm
STL
- BTM
1 stop5h 26m
United Airlines
Deal found 2/5![United Airlines logo]()
$517
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:25 am
BIL
- STL
1 stop6h 59m
Delta
Fri 3/203:05 pm
STL
- BIL
1 stop6h 14m
Delta
Deal found 2/5![Delta logo]()
$439
This Alaska Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/254:36 pm
HLN
- STL
2 stops15h 19m
Alaska Airlines
Sat 2/285:12 am
STL
- HLN
2 stops11h 47m
Alaska Airlines
Deal found 2/8![Alaska Airlines logo]()
$686
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/217:00 am
FCA
- STL
2 stops12h 26m
United Airlines
Wed 2/252:45 pm
STL
- FCA
1 stop8h 27m
United Airlines
Deal found 2/6![United Airlines logo]()
$731
Last-minute flights from Montana to St. LouisDiscover last-minute flight deals from Montana to St. Louis. Data last updated February 9, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to St. Louis. Data last updated February 9, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/217:30 am
MSO
- STL
1 stop6h 24m
Delta
Wed 2/257:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/216:15 am
MSO
- STL
1 stop5h 59m
United Airlines
Wed 2/257:41 am
STL
- MSO
2 stops9h 28m
United Airlines
Deal found 2/6![United Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 2/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/222:34 pm
MSO
- STL
1 stop4h 52m
United Airlines
Thu 2/262:45 pm
STL
- MSO
1 stop8h 12m
United Airlines
Deal found 2/7![United Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/236:10 pm
MSO
- STL
1 stop5h 15m
Delta
Sat 3/77:00 am
STL
- MSO
1 stop6h 26m
Delta
Deal found 2/6![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/252:41 pm
BZN
- STL
1 stop4h 45m
United Airlines
Sat 2/284:30 pm
STL
- BZN
1 stop5h 37m
United Airlines
Deal found 2/5![United Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:25 pm
HLN
- STL
1 stop5h 01m
United Airlines
Sat 2/284:30 pm
STL
- HLN
1 stop5h 46m
United Airlines
Deal found 2/8![United Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:41 pm
BZN
- STL
1 stop4h 45m
United Airlines
Tue 3/38:41 am
STL
- BZN
1 stop5h 55m
United Airlines
Deal found 2/8![United Airlines logo]()
$225
This Alaska Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 2/276:23 am
MSO
- STL
1 stop6h 28m
Alaska Airlines
Mon 3/27:00 am
STL
- MSO
2 stops30h 59m
Alaska Airlines
Deal found 2/5![Alaska Airlines logo]()
$331
This United Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:34 pm
MSO
- STL
1 stop4h 52m
United Airlines
Mon 3/24:30 pm
STL
- MSO
1 stop6h 27m
United Airlines
Deal found 2/5![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/43:20 pm
FCA
- STL
1 stop7h 03m
Delta
Wed 3/116:32 am
STL
- FCA
2 stops11h 43m
Delta
Deal found 2/6![Delta logo]()
$434
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:25 am
BIL
- STL
1 stop6h 59m
Delta
Fri 3/203:05 pm
STL
- BIL
1 stop6h 14m
Delta
Deal found 2/5![Delta logo]()
$439
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/274:30 pm
BZN
- STL
1 stop6h 04m
United Airlines
Mon 3/302:40 pm
STL
- BZN
1 stop7h 52m
United Airlines
Deal found 2/6![United Airlines logo]()
$241
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 February 9, 2026.
Search for one-way flight options from Montana to St. Louis. Find affordable one-way fares based on user searches. Data last updated February 9, 2026.
This United Airlines deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/218:11 am
BZN
- STL
1 stop5h 18m
United Airlines
Deal found 2/6![United Airlines logo]()
$120
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/236:30 pm
BZN
- STL
1 stop4h 55m
Delta
Deal found 2/6![Delta logo]()
$129
This United Airlines deal was found by Cheapflights users on 2/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2610:50 am
BZN
- STL
2 stops11h 09m
United Airlines
Deal found 2/8![United Airlines logo]()
$145
This Delta deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/205:58 am
BZN
- STL
1 stop4h 50m
Delta
Deal found 2/6![Delta logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/2310:43 am
BZN
- STL
2 stops30h 53m
Multiple Airlines
Deal found 2/6![Multiple Airlines logo]()
$176
This American Airlines deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 5/2912:36 pm
BIL
- STL
1 stop6h 50m
American Airlines
Deal found 2/5![American Airlines logo]()
$216
This Southwest deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 3/186:30 am
BZN
- STL
2 stops12h 25m
Southwest
Deal found 2/6![Southwest logo]()
$231
This Southwest deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/2110:50 am
BZN
- STL
2 stops9h 20m
Southwest
Deal found 2/6![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” 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 5/296:25 am
BIL
- STL
2 stops9h 51m
Delta
Deal found 2/5![Delta logo]()
$251
This Delta deal was found by Cheapflights users on 2/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/193:20 pm
FCA
- STL
1 stop7h 03m
Delta
Deal found 2/9![Delta logo]()
$266
This Southwest deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/163:35 pm
BZN
- STL
1 stop6h 40m
Southwest
Deal found 2/6![Southwest logo]()
$316
This Southwest deal was found by Cheapflights users on 2/6. Clicking the “Pick Dates” 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 2/225:20 pm
BZN
- STL
1 stop6h 30m
Southwest
Deal found 2/6![Southwest logo]()
$344
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 February 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $225 (United Airlines) |
One-way from | $120 (United Airlines) |
Popular in | March |
Cheapest in | February |
Average price | $287 |
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 February 9, 2026.
Use the filters below to find and compare flights from Montana to St. Louis that are best for you.
Fly from
Montana
Fly to
St. Louis
Route
Depart
Return
Price
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 4/30
5:59 am-11:32 am
1 stop4h 33m
Lambert-St Louis
Sun 5/3
6:45 pm-12:09 am
1 stop6h 24m
$288
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Fri 5/8
6:29 pm-12:30 am
1 stop5h 01m
Lambert-St Louis
Mon 5/11
7:59 pm-11:59 pm
1 stop5h 00m
$288
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Wed 2/25
2:41 pm-8:26 pm
1 stop4h 45m
Lambert-St Louis
Sat 2/28
4:30 pm-9:07 pm
1 stop5h 37m
$305
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Fri 4/10
6:30 pm-12:21 am
1 stop4h 51m
Lambert-St Louis
Sun 4/12
6:29 am-1:06 pm
1 stop7h 37m
$319
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Fri 2/27
6:23 am-1:51 pm
1 stop6h 28m
Lambert-St Louis
Mon 3/2
7:00 am-12:59 pm
2 stops30h 59m
$331
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 2/21
7:30 am-2:54 pm
1 stop6h 24m
Lambert-St Louis
Wed 2/25
7:00 am-12:26 pm
1 stop6h 26m
$339
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Sat 2/21
6:15 am-1:14 pm
1 stop5h 59m
Lambert-St Louis
Wed 2/25
7:41 am-4:09 pm
2 stops9h 28m
$344
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Fri 2/27
2:34 pm-8:26 pm
1 stop4h 52m
Lambert-St Louis
Mon 3/2
4:30 pm-9:57 pm
1 stop6h 27m
$369
MissoulaSt. Louis
MSO - STL
MSOSTL
Missoula Johnson-Bell Field
Mon 2/23
6:10 pm-12:25 am
1 stop5h 15m
Lambert-St Louis
Sat 3/7
7:00 am-12:26 pm
1 stop6h 26m
$379
BillingsSt. Louis
BIL - STL
BILSTL
Billings Logan Intl
Mon 5/18
6:20 pm-12:30 am
1 stop5h 10m
Lambert-St Louis
Thu 5/28
1:50 pm-11:03 pm
2 stops10h 13m
$394
Showing 1-10 of 38 results
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
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
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 $176). Flying from Montana to St. Louis in March is currently the most expensive (average of $355). 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.
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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
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 February 9, 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 February 9, 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 February 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$128 | Average$420 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$210 | Average$484 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$249 | Average$491 | FlexibilityNo cancel fee | On-time69% |