$118+ Cheap flights from Illinois to Montana
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/28. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Oct 17 — Oct 241
Round-trip
1 adult, Economy
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Cheapest flights from Illinois to MontanaExplore the most affordable flight options available from Illinois to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
Explore the most affordable flight options available from Illinois to Montana. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/141:29 pm -
1 stop6h 43m
Wed 10/2112:53 pm -
1 stop7h 28m
Deal found 9/16![United Airlines logo]()
$280
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/318:05 am -
1 stop5h 50m
Sat 11/77:30 am -
1 stop5h 40m
Deal found 9/13![Southwest logo]()
$285
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/147:00 pm -
1 stop6h 27m
Wed 10/215:30 am -
2 stops9h 58m
Deal found 9/16![Delta logo]()
$290
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 11/142:45 pm -
2 stops7h 50m
Wed 12/28:05 am -
2 stops8h 20m
Deal found 9/13![Southwest logo]()
$295
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:02 am -
1 stop9h 13m
Tue 10/271:55 pm -
1 stop9h 04m
Deal found 9/16![Alaska Airlines logo]()
$304
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/272:50 pm -
1 stop7h 22m
Wed 11/47:00 am -
1 stop8h 00m
Deal found 9/13![American Airlines logo]()
$315
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/277:35 am -
1 stop5h 43m
Wed 11/412:58 pm -
1 stop8h 07m
Deal found 9/16![Delta logo]()
$321
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/71:27 pm -
2 stops9h 58m
Wed 11/116:34 am -
1 stop4h 16m
Deal found 9/16![Delta logo]()
$326
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/176:35 am -
2 stops8h 15m
Sat 10/248:15 am -
2 stops8h 45m
Deal found 9/16![Southwest logo]()
$333
This Priceline deal was found by Cheapflights users on 9/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am -
1 stop8h 15m
Sat 10/317:24 am -
1 stop9h 56m
Deal found 9/12![Alaska Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/163:30 pm -
1 stop5h 45m
Tue 10/206:16 am -
1 stop4h 24m
Deal found 9/13![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/169:15 am -
Nonstop3h 30m
Fri 10/2312:53 pm -
Nonstop3h 07m
Deal found 9/16![United Airlines logo]()
$339
Best flights from Illinois to MontanaDiscover carefully curated flight deals from Illinois to Montana that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
Discover carefully curated flight deals from Illinois to Montana that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:02 am -
1 stop9h 13m
Tue 10/271:55 pm -
1 stop9h 04m
Deal found 9/15![Alaska Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 2/277:30 am -
1 stop5h 49m
Wed 3/312:58 pm -
1 stop7h 55m
Deal found 9/13![Delta logo]()
$321
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/176:35 am -
2 stops8h 15m
Sat 10/248:15 am -
2 stops8h 45m
Deal found 9/16![Southwest logo]()
$333
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/179:15 am -
Nonstop3h 30m
Sat 10/242:37 pm -
1 stop7h 09m
Deal found 9/16![United Airlines logo]()
$345
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/278:29 am -
2 stops10h 20m
Wed 11/45:20 am -
1 stop5h 35m
Deal found 9/15![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/173:50 pm -
1 stop6h 32m
Mon 10/192:37 pm -
1 stop8h 22m
Deal found 9/16![United Airlines logo]()
$348
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/71:27 pm -
2 stops9h 58m
Wed 11/116:34 am -
1 stop4h 16m
Deal found 9/16![Delta logo]()
$326
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 11/45:45 pm -
1 stop5h 45m
Wed 11/1111:20 am -
1 stop5h 05m
Deal found 9/16![Southwest logo]()
$359
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/74:18 pm -
2 stops21h 18m
Sun 12/207:00 am -
2 stops16h 15m
Deal found 9/16![American Airlines logo]()
$750
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/113:09 pm -
1 stop26h 04m
Tue 2/164:55 pm -
1 stop20h 17m
Deal found 9/16![Alaska Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 11/1711:27 am -
2 stops9h 10m
Tue 11/246:34 am -
1 stop4h 16m
Deal found 9/15![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/158:40 am -
Nonstop3h 48m
Thu 10/2212:26 pm -
Nonstop3h 34m
Deal found 9/15![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 1/196:10 am -
1 stop5h 35m
Sun 1/2411:30 am -
1 stop6h 45m
Deal found 9/15![Southwest logo]()
$369
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 2/271:00 pm -
2 stops10h 32m
Wed 3/36:15 am -
1 stop4h 36m
Deal found 9/13![Delta logo]()
$326
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/98:40 am -
Nonstop3h 48m
Thu 10/1512:26 pm -
Nonstop3h 34m
Deal found 9/16![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/293:45 pm -
2 stops8h 40m
Mon 11/27:55 am -
2 stops8h 50m
Deal found 9/15![Southwest logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/165:00 am -
1 stop5h 57m
Tue 10/2012:28 pm -
Nonstop3h 31m
Deal found 9/16![United Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/176:35 am -
1 stop9h 19m
Sat 10/245:30 am -
2 stops10h 11m
Deal found 9/16![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 1/318:40 am -
1 stop7h 33m
Fri 2/52:37 pm -
1 stop7h 01m
Deal found 9/13![United Airlines logo]()
$370
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/264:50 pm -
1 stop7h 35m
Thu 10/295:50 am -
1 stop6h 55m
Deal found 9/13![Southwest logo]()
$441
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 2/237:00 am -
1 stop8h 33m
Sat 2/276:00 am -
1 stop4h 42m
Deal found 9/13![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 12/34:07 pm -
1 stop6h 44m
Tue 12/82:42 pm -
1 stop5h 52m
Deal found 9/15![United Airlines logo]()
$379
This Alaska Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/116:00 am -
1 stop11h 35m
Sun 10/185:15 pm -
1 stop11h 25m
Deal found 9/14![Alaska Airlines logo]()
$592
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 1/197:30 am -
1 stop5h 53m
Sun 1/246:00 am -
1 stop7h 57m
Deal found 9/15![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/105:51 pm -
1 stop6h 00m
Tue 10/132:28 pm -
1 stop6h 23m
Deal found 9/15![United Airlines logo]()
$385
This Southwest deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” 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 10/164:50 pm -
1 stop7h 35m
Sun 10/185:00 am -
1 stop4h 25m
Deal found 9/17![Southwest logo]()
$477
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/296:30 am -
1 stop7h 49m
Mon 11/28:25 am -
1 stop7h 28m
Deal found 9/15![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 9/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/275:00 am -
1 stop5h 46m
Thu 10/12:28 pm -
1 stop5h 50m
Deal found 9/12![United Airlines logo]()
$385
This Delta deal was found by Cheapflights users on 9/12. 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.
Wed 1/66:00 am -
1 stop8h 16m
Mon 1/112:00 pm -
1 stop7h 10m
Deal found 9/12![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/241:25 pm -
2 stops8h 39m
Tue 10/276:30 am -
2 stops8h 13m
Deal found 9/16![United Airlines logo]()
$404
Last-minute flights from Illinois to MontanaDiscover last-minute flight deals from Illinois to Montana. Data last updated September 17, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Montana. Data last updated September 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/141:29 pm -
1 stop6h 43m
Wed 10/2112:53 pm -
1 stop7h 28m
Deal found 9/16![United Airlines logo]()
$280
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/147:00 pm -
1 stop6h 27m
Wed 10/215:30 am -
2 stops9h 58m
Deal found 9/16![Delta logo]()
$290
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/163:30 pm -
1 stop5h 45m
Tue 10/206:16 am -
1 stop4h 24m
Deal found 9/13![Delta logo]()
$337
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/169:15 am -
Nonstop3h 30m
Fri 10/2312:53 pm -
Nonstop3h 07m
Deal found 9/16![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/176:35 am -
2 stops8h 15m
Sat 10/248:15 am -
2 stops8h 45m
Deal found 9/16![Southwest logo]()
$333
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/236:25 pm -
1 stop6h 00m
Mon 10/266:15 pm -
1 stop10h 25m
Deal found 9/15![Southwest logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/246:02 am -
1 stop9h 13m
Tue 10/271:55 pm -
1 stop9h 04m
Deal found 9/16![Alaska Airlines logo]()
$304
This Priceline deal was found by Cheapflights users on 9/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am -
1 stop8h 15m
Sat 10/317:24 am -
1 stop9h 56m
Deal found 9/12![Alaska Airlines logo]()
$335
This American Airlines deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/272:50 pm -
1 stop7h 22m
Wed 11/47:00 am -
1 stop8h 00m
Deal found 9/13![American Airlines logo]()
$315
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/277:35 am -
1 stop5h 43m
Wed 11/412:58 pm -
1 stop8h 07m
Deal found 9/16![Delta logo]()
$321
This Southwest deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 10/304:50 pm -
1 stop7h 35m
Fri 11/64:05 pm -
1 stop4h 55m
Deal found 9/15![Southwest logo]()
$342
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/318:05 am -
1 stop5h 50m
Sat 11/77:30 am -
1 stop5h 40m
Deal found 9/13![Southwest logo]()
$285
One-way flights from Illinois to MontanaSearch for one-way flight options from Illinois to Montana. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
Search for one-way flight options from Illinois to Montana. Find affordable one-way fares based on user searches. Data last updated September 17, 2026.
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/286:05 am -
1 stop7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$118
This Southwest deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” 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 10/136:05 am -
1 stop7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Southwest logo]()
$123
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 12/1512:50 pm -
2 stops10h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:16 am -
2 stops27h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$131
This Southwest deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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 10/266:05 am -
1 stop5h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Southwest logo]()
$133
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” 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 11/125:15 pm -
1 stop24h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:30 am -
2 stops27h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$143
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” 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 10/293:45 pm -
2 stops8h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Southwest logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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.
Tue 11/178:13 pm -
2 stops38h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/147:40 am -
2 stops26h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:30 pm -
2 stops18h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Multiple Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” 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.
Tue 11/176:30 am -
2 stops52h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Multiple Airlines logo]()
$153
Find flight deals from Illinois to Montana
Keep the following information in mind while searching for Illinois to Montana flight deals. Data was last updated September 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $280 (United Airlines) |
One-way from | $118 (Southwest) |
Popular in | September |
Cheapest in | April |
Average price | $416 |
Good round-trip deal | $368 or less |
Good one-way deal | $237 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Montana 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 7,457,451 searches. Data last updated September 17, 2026.
Use the filters below to find and compare flights from Illinois to Montana that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
ChicagoBozeman
MDW Chicago Midway - BZN Bozeman Gallatin Field
MDWBZN
Chicago Midway
Mon 10/26
6:05 am-10:25 am
1 stop5h 20m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$133
ChicagoBozeman
MDW Chicago Midway - BZN Bozeman Gallatin Field
MDWBZN
Chicago Midway
Mon 12/14
6:05 am-10:35 am
1 stop5h 30m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$165
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Wed 12/9
8:00 am-2:06 pm
1 stop7h 06m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$168
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Mon 12/14
6:47 pm-9:47 am
1 stop16h 00m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$173
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Sat 11/21
5:48 pm-10:30 pm
1 stop5h 42m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Tue 12/8
3:47 pm-7:48 pm
1 stop5h 01m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Wed 10/14
5:00 am-9:46 am
1 stop5h 46m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Sat 10/10
4:00 pm-10:25 pm
1 stop7h 25m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Sun 9/27
5:00 am-9:46 am
1 stop5h 46m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Fri 9/25
5:00 am-9:46 am
1 stop5h 46m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Illinois to Montana
Have a flexible travel schedule? Discover the best time to fly to Montana from Illinois with our price prediction graph.
STL-BZN
ORD-BIL
MDW-BZN
ORD-BZN
ORD-GTF
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 Illinois to Montana
USIL-USMT
STL-BZN
ORD-BIL
MDW-BZN
ORD-BZN
What is the cheapest month to book a flight from Illinois to Montana?
Currently, April is the cheapest month in which you can book a flight from Illinois to Montana (average of $349). Flying from Illinois to Montana in July is currently the most expensive (average of $458). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IL to MT?
Find hourly flight availability from Illinois to Montana. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2026.
Unlike in the evening, when flights are generally more expensive, you can save up to 31% on flights from Illinois to Montana by exploring options for tickets in the afternoon.
Weekly flight availability from Illinois to Montana
Explore weekly flight availability from Illinois to Montana. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 17, 2026.
The most flights from USIL to USMT are scheduled on a Monday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Illinois to Montana?
Airfare is typical for this route at the moment.
Illinois to Montana flights typically cost between $294 and $481 in October.The cheapest round-trip price found within the last 5 days was $335 on Alaska Airlines (Oct 24-Oct 31).
How far ahead should I book a flight from Illinois to Montana?
The price you pay for your flight from Illinois to Montana may vary depending on when you book. For the best chance of a lower fare, look to book 16 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Illinois to Montana?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Montana. Price data was last updated on September 12, 2026.
Travelers seeking maximum savings on their Illinois to Montana flight should consider departing on Monday afternoons when fares are most often at their lowest. Tuesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Montana
Get insights into the airlines that provide service to Montana. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Montana. Reviews last updated September 17, 2026.
Read reviews from past customers who have flown Southwest,Alaska Airlines, andDelta from Illinois to Montana. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Food
7.0
Boarding
8.1
Entertainment
7.5
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Related info for your journey
Find useful and relevant information for your journey from Illinois to Montana. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Illinois to Montana
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Montana by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Montana by cabin class
Find flights from Illinois to Montana, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Montana flights
Browse other Illinois and Montana flight options. Last updated on September 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Montana
Find the right flight back to Illinois after your stay in Montana
Illinois to Montana flights
Consider these flights traveling from Illinois to Montana.
Top 5 airlines flying from Illinois to Montana
Discover the top 5 airlines that operate flights from Illinois to Montana. 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 7,457,451 searches. Data last updated September 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$216 | Average$395 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$226 | Average$513 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$229 | Average$467 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$232 | Average$466 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$269 | Average$412 | FlexibilityNo cancel fee | On-time63% |