$144+ 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 12/9. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — BZN
Dec 4 — Dec 111
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 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 November 4, 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 November 4, 2026.
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/412:34 pm -
1 stop8h 28m
Thu 12/101:19 pm -
1 stop7h 37m
Deal found 11/1![Delta logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/35:29 pm -
1 stop17h 18m
Wed 12/97:00 am -
1 stop9h 49m
Deal found 11/3![Alaska Airlines logo]()
$319
This Expedia deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Sat 12/59:00 am -
1 stop10h 34m
Sun 12/610:27 am -
1 stop12h 32m
Deal found 11/2![Alaska Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:14 pm -
Nonstop3h 41m
Thu 12/246:14 am -
Nonstop3h 26m
Deal found 11/2![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/185:14 pm -
Nonstop3h 41m
Fri 12/257:39 am -
Nonstop3h 21m
Deal found 11/3![American Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/53:47 pm -
1 stop5h 01m
Sat 12/125:30 am -
1 stop5h 33m
Deal found 11/3![Delta logo]()
$341
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/185:14 pm -
Nonstop3h 41m
Sun 12/201:30 pm -
Nonstop3h 16m
Deal found 11/2![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/107:25 am -
1 stop5h 55m
Sun 12/135:30 am -
1 stop5h 33m
Deal found 11/2![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/18:59 am -
Nonstop3h 34m
Sat 12/57:20 am -
Nonstop3h 21m
Deal found 11/2![United Airlines logo]()
$350
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/24:20 pm -
1 stop5h 39m
Wed 12/95:50 pm -
1 stop5h 09m
Deal found 11/2![United Airlines logo]()
$352
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/144:20 pm -
1 stop5h 54m
Wed 11/182:42 pm -
1 stop7h 04m
Deal found 10/30![United Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/107:25 am -
1 stop5h 55m
Mon 12/145:30 am -
2 stops10h 13m
Deal found 11/2![Delta logo]()
$354
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 November 4, 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 November 4, 2026.
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 2/17:15 am -
1 stop6h 18m
Thu 4/15:45 am -
1 stop5h 40m
Deal found 11/2![Delta logo]()
$323
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/78:59 am -
Nonstop3h 34m
Thu 12/107:20 am -
Nonstop3h 21m
Deal found 11/2![United Airlines logo]()
$339
This Alaska Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/308:00 am -
1 stop8h 28m
Wed 2/34:08 pm -
1 stop6h 51m
Deal found 10/30![Alaska Airlines logo]()
$368
This Southwest deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 1/2310:15 am -
2 stops11h 15m
Mon 2/13:05 pm -
1 stop5h 40m
Deal found 11/1![Southwest logo]()
$374
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/53:47 pm -
1 stop5h 01m
Sat 12/125:30 am -
1 stop5h 33m
Deal found 11/1![Delta logo]()
$341
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/181:00 pm -
1 stop5h 14m
Sun 11/225:00 am -
1 stop7h 29m
Deal found 11/3![United Airlines logo]()
$353
This Alaska Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 1/238:00 am -
1 stop8h 28m
Wed 1/274:08 pm -
1 stop6h 51m
Deal found 11/1![Alaska Airlines logo]()
$368
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/144:20 pm -
1 stop5h 54m
Wed 11/182:42 pm -
1 stop7h 04m
Deal found 10/30![United Airlines logo]()
$353
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 11/181:30 pm -
2 stops9h 50m
Sun 11/225:35 am -
1 stop5h 28m
Deal found 11/3![Delta logo]()
$358
This Southwest deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 1/2112:50 pm -
2 stops10h 15m
Sun 1/248:35 am -
2 stops6h 45m
Deal found 10/31![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 2/232:20 pm -
1 stop9h 22m
Sat 2/275:19 am -
1 stop6h 14m
Deal found 11/1![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/18:59 am -
Nonstop3h 34m
Sat 12/56:30 am -
1 stop5h 58m
Deal found 10/31![United Airlines logo]()
$362
This Alaska Airlines deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/99:00 am -
1 stop8h 12m
Sat 12/124:49 pm -
1 stop11h 48m
Deal found 11/1![Alaska Airlines logo]()
$406
This Delta deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 2/256:30 am -
1 stop9h 03m
Sat 2/273:40 pm -
1 stop7h 06m
Deal found 10/30![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/98:40 am -
1 stop6h 09m
Sat 12/122:47 pm -
1 stop5h 47m
Deal found 11/2![United Airlines logo]()
$368
This Alaska Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 1/208:00 am -
1 stop8h 22m
Sat 1/237:35 am -
1 stop11h 03m
Deal found 11/3![Alaska Airlines logo]()
$413
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 1/152:25 pm -
1 stop9h 10m
Mon 1/183:35 pm -
1 stop7h 24m
Deal found 10/31![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/236:27 am -
1 stop6h 22m
Wed 1/272:32 pm -
1 stop5h 38m
Deal found 10/30![United Airlines logo]()
$369
This Alaska Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/58:00 am -
1 stop8h 32m
Sat 1/91:02 pm -
2 stops9h 57m
Deal found 10/30![Alaska Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/167:18 pm -
1 stop6h 08m
Wed 12/233:28 pm -
1 stop7h 34m
Deal found 11/1![Delta logo]()
$359
This Alaska Airlines deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 1/308:00 am -
1 stop9h 31m
Tue 2/25:08 pm -
1 stop20h 13m
Deal found 10/31![Alaska Airlines logo]()
$426
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/113:47 pm -
1 stop5h 01m
Sun 12/135:30 am -
1 stop5h 33m
Deal found 11/2![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/168:40 am -
1 stop7h 43m
Fri 12/185:50 pm -
1 stop5h 40m
Deal found 11/3![United Airlines logo]()
$409
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/147:15 am -
1 stop6h 04m
Sun 4/185:45 am -
2 stops10h 04m
Deal found 11/1![Delta logo]()
$360
This Alaska Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 1/72:11 pm -
1 stop24h 00m
Mon 1/117:57 pm -
1 stop17h 24m
Deal found 11/3![Alaska Airlines logo]()
$468
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 12/176:50 am -
1 stop7h 35m
Wed 1/62:38 pm -
1 stop5h 55m
Deal found 10/30![United Airlines logo]()
$428
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 11/236:40 am -
1 stop8h 49m
Wed 12/27:00 am -
2 stops10h 06m
Deal found 11/1![Delta logo]()
$364
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 1/63:43 pm -
1 stop6h 32m
Fri 1/82:38 pm -
1 stop5h 55m
Deal found 11/2![United Airlines logo]()
$430
This Alaska Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/68:00 am -
1 stop9h 23m
Tue 1/125:00 pm -
2 stops28h 08m
Deal found 10/30![Alaska Airlines logo]()
$483
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 2/59:56 am -
2 stops13h 44m
Wed 2/106:10 am -
1 stop4h 54m
Deal found 11/2![Delta logo]()
$364
Last-minute flights from Illinois to MontanaDiscover last-minute flight deals from Illinois to Montana. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Montana. Data last updated November 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 11/144:20 pm -
1 stop5h 54m
Wed 11/182:42 pm -
1 stop7h 04m
Deal found 10/30![United Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/18:59 am -
Nonstop3h 34m
Sat 12/57:20 am -
Nonstop3h 21m
Deal found 11/2![United Airlines logo]()
$350
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/24:20 pm -
1 stop5h 39m
Wed 12/95:50 pm -
1 stop5h 09m
Deal found 11/2![United Airlines logo]()
$352
This Alaska Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/35:29 pm -
1 stop17h 18m
Wed 12/97:00 am -
1 stop9h 49m
Deal found 11/3![Alaska Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/412:34 pm -
1 stop8h 28m
Thu 12/101:19 pm -
1 stop7h 37m
Deal found 11/1![Delta logo]()
$313
This Expedia deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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.
Sat 12/59:00 am -
1 stop10h 34m
Sun 12/610:27 am -
1 stop12h 32m
Deal found 11/2![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/53:47 pm -
1 stop5h 01m
Sat 12/125:30 am -
1 stop5h 33m
Deal found 11/3![Delta logo]()
$341
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/107:25 am -
1 stop5h 55m
Mon 12/141:00 pm -
1 stop7h 56m
Deal found 11/2![Delta logo]()
$349
This United Airlines deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 12/148:59 am -
Nonstop3h 34m
Mon 12/212:34 pm -
1 stop7h 08m
Deal found 10/30![United Airlines logo]()
$355
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:14 pm -
Nonstop3h 41m
Thu 12/246:14 am -
Nonstop3h 26m
Deal found 11/2![American Airlines logo]()
$339
This American Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/185:14 pm -
Nonstop3h 41m
Fri 12/257:39 am -
Nonstop3h 21m
Deal found 11/3![American Airlines logo]()
$341
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/185:14 pm -
Nonstop3h 41m
Sun 12/201:30 pm -
Nonstop3h 16m
Deal found 11/2![American Airlines logo]()
$349
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 November 4, 2026.
Search for one-way flight options from Illinois to Montana. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/96:21 am -
1 stop28h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 12/26:21 am -
1 stop28h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Multiple Airlines logo]()
$145
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” 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 1/57:15 am -
1 stop6h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Delta logo]()
$149
This Priceline deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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.
Fri 12/43:19 pm -
1 stop9h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Alaska Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 1/117:30 am -
1 stop10h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Multiple Airlines logo]()
$159
This Alaska Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” 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 12/105:29 pm -
1 stop17h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Alaska Airlines logo]()
$165
This United Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/18:59 am -
Nonstop3h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![United Airlines logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 10/30. Clicking the “Pick Dates” 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 1/288:14 pm -
1 stop14h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Multiple Airlines logo]()
$177
This American Airlines deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/111:44 pm -
1 stop7h 56m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![American Airlines logo]()
$177
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 12/16:40 am -
1 stop8h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Delta logo]()
$180
This Southwest deal was found by Cheapflights users on 11/1. Clicking the “Pick Dates” 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 12/96:05 am -
1 stop5h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Southwest logo]()
$180
This Delta deal was found by Cheapflights users on 11/2. Clicking the “Pick Dates” 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 11/112:44 pm -
2 stops8h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Delta logo]()
$182
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 November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $313 (Delta) |
One-way from | $144 (Kiwi.com) |
Popular in | November |
Cheapest in | April |
Average price | $474 |
Good round-trip deal | $364 or less |
Good one-way deal | $224 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 November 4, 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
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Tue 1/5
7:15 am-12:33 pm
1 stop6h 18m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
ChicagoMissoula
ORD Chicago O'Hare Intl - MSO Missoula Johnson-Bell Field
ORDMSO
Chicago O'Hare Intl
Fri 12/4
3:19 pm-11:19 pm
1 stop9h 00m
Missoula Johnson-Bell Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$157
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Thu 12/10
5:29 pm-9:47 am
1 stop17h 18m
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
Thu 1/28
10:05 am-12:41 pm
Nonstop3h 36m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$170
Quickest round-trip
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Tue 12/1
8:59 am-11:33 am
Nonstop3h 34m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$170
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Mon 12/14
8:59 am-11:33 am
Nonstop3h 34m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$170
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Wed 12/9
8:59 am-11:33 am
Nonstop3h 34m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$170
ChicagoBillings
ORD Chicago O'Hare Intl - BIL Billings Logan Intl
ORDBIL
Chicago O'Hare Intl
Wed 11/18
6:00 am-12:53 pm
1 stop7h 53m
Billings Logan Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$177
ChicagoBozeman
MDW Chicago Midway - BZN Bozeman Gallatin Field
MDWBZN
Chicago Midway
Wed 12/9
6:05 am-10:35 am
1 stop5h 30m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$180
ChicagoBozeman
ORD Chicago O'Hare Intl - BZN Bozeman Gallatin Field
ORDBZN
Chicago O'Hare Intl
Wed 12/30
5:25 am-2:12 pm
1 stop9h 47m
Bozeman Gallatin Field
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$180
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.
ORD-MSO
ORD-BZN
ORD-BIL
ORD-GTF
MDW-BZN
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
ORD-MSO
ORD-BZN
ORD-BIL
ORD-GTF
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 $350). Flying from Illinois to Montana in November is currently the most expensive (average of $482). 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 November 4, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 32% on flights from Illinois to Montana by exploring options for tickets in the afternoon.
How much does it cost to fly round-trip from Illinois to Montana?
Airfare is below average for this route at the moment.
Illinois to Montana flights typically cost between $339 and $550 in December.The cheapest round-trip price found within the last 5 days was $319 on Alaska Airlines (Dec 3-Dec 9).
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 27 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 October 31, 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. Sunday mornings 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 November 4, 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
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Food
7.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Overall
8.0
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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.
Browse thousands of different options on Cheapflights for your next trip
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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 November 4, 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 November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$216 | Average$377 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$226 | Average$480 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$229 | Average$478 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$248 | Average$560 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$269 | Average$412 | FlexibilityNo cancel fee | On-time63% |