$141+ Cheap flights from Montana to O'Hare Intl (ORD)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ORD
Jul 29 — Aug 51
Round-trip
1 adult, Economy
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Cheapest flights from Montana to O'Hare IntlExplore the most affordable flight options available from Montana to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 29, 2026.
Explore the most affordable flight options available from Montana to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 29, 2026.
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/125:20 am
BIL
- ORD
1 stop5h 39m
Delta
Sat 8/153:00 pm
ORD
- BIL
1 stop6h 12m
Delta
Deal found 6/26![Delta logo]()
$271
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:20 am
BIL
- ORD
1 stop5h 39m
Delta
Wed 8/191:59 pm
ORD
- BIL
2 stops10h 31m
Delta
Deal found 6/25![Delta logo]()
$276
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Sun 8/21:49 pm
ORD
- BZN
Nonstop3h 24m
American Airlines
Deal found 6/24![American Airlines logo]()
$283
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/21:40 pm
BZN
- ORD
Nonstop3h 19m
American Airlines
Sun 10/410:16 am
ORD
- BZN
Nonstop3h 27m
American Airlines
Deal found 6/24![American Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 7/305:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Sun 8/21:49 pm
ORD
- BZN
Nonstop3h 24m
American Airlines
Deal found 6/27![American Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:30 pm
BZN
- ORD
1 stop7h 15m
United Airlines
Sat 8/291:01 pm
ORD
- BZN
Nonstop3h 22m
United Airlines
Deal found 6/26![United Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:29 pm
BIL
- ORD
1 stop7h 16m
United Airlines
Sat 8/298:40 am
ORD
- BIL
Nonstop3h 22m
United Airlines
Deal found 6/24![United Airlines logo]()
$292
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/144:15 pm
BZN
- ORD
1 stop7h 03m
American Airlines
Sun 8/239:45 am
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 6/24![American Airlines logo]()
$295
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:23 pm
BZN
- ORD
Nonstop3h 07m
United Airlines
Sun 9/131:00 pm
ORD
- BZN
Nonstop3h 20m
United Airlines
Deal found 6/24![United Airlines logo]()
$299
This American Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/254:16 pm
BZN
- ORD
1 stop6h 58m
American Airlines
Tue 9/2910:16 am
ORD
- BZN
Nonstop3h 27m
American Airlines
Deal found 6/26![American Airlines logo]()
$301
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:20 am
BIL
- ORD
1 stop5h 39m
Delta
Sun 9/135:50 pm
ORD
- BIL
1 stop6h 25m
Delta
Deal found 6/25![Delta logo]()
$302
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
BZN
- ORD
1 stop4h 59m
Delta
Tue 8/187:48 am
ORD
- BZN
1 stop5h 17m
Delta
Deal found 6/25![Delta logo]()
$305
Best flights from Montana to O'Hare IntlDiscover carefully curated flight deals from Montana to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 29, 2026.
Discover carefully curated flight deals from Montana to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 29, 2026.
This United Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/42:30 pm
BZN
- ORD
1 stop7h 16m
United Airlines
Sat 9/195:30 pm
ORD
- BZN
Nonstop3h 27m
United Airlines
Deal found 6/26![United Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/43:14 pm
BZN
- ORD
1 stop5h 16m
Delta
Sat 9/197:00 am
ORD
- BZN
1 stop8h 37m
Delta
Deal found 6/24![Delta logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/144:41 pm
HLN
- ORD
1 stop11h 59m
Alaska Airlines
Tue 11/177:00 am
ORD
- HLN
1 stop10h 04m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$426
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 10/61:58 pm
FCA
- ORD
Nonstop3h 35m
American Airlines
Mon 10/1210:30 am
ORD
- FCA
Nonstop3h 57m
American Airlines
Deal found 6/28![American Airlines logo]()
$457
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/182:30 pm
BZN
- ORD
1 stop7h 16m
United Airlines
Wed 8/195:00 am
ORD
- BZN
1 stop5h 39m
United Airlines
Deal found 6/28![United Airlines logo]()
$300
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:30 am
BZN
- ORD
2 stops12h 23m
Delta
Mon 10/261:55 pm
ORD
- BZN
2 stops9h 26m
Delta
Deal found 6/24![Delta logo]()
$315
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 9/171:15 pm
GTF
- ORD
1 stop7h 37m
Delta
Sun 9/207:45 am
ORD
- GTF
1 stop5h 50m
Delta
Deal found 6/28![Delta logo]()
$318
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/122:25 pm
GTF
- ORD
1 stop6h 05m
United Airlines
Sat 9/197:00 am
ORD
- GTF
1 stop7h 29m
United Airlines
Deal found 6/25![United Airlines logo]()
$318
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:29 pm
BZN
- ORD
1 stop7h 15m
United Airlines
Tue 8/45:00 am
ORD
- BZN
1 stop5h 37m
United Airlines
Deal found 6/28![United Airlines logo]()
$320
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/35:30 am
FCA
- ORD
1 stop5h 25m
Delta
Mon 10/58:25 am
ORD
- FCA
1 stop6h 00m
Delta
Deal found 6/24![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:45 pm
FCA
- ORD
1 stop9h 35m
Alaska Airlines
Fri 10/99:00 am
ORD
- FCA
1 stop11h 05m
Alaska Airlines
Deal found 6/24![Alaska Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 8/15:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 6/24![United Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 10/83:36 pm
FCA
- ORD
1 stop4h 56m
Delta
Sat 10/109:59 am
ORD
- FCA
1 stop5h 42m
Delta
Deal found 6/28![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am
MSO
- ORD
1 stop4h 39m
Delta
Sat 9/266:24 pm
ORD
- MSO
1 stop6h 11m
Delta
Deal found 6/24![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/112:25 pm
GTF
- ORD
1 stop6h 35m
United Airlines
Fri 9/185:55 am
ORD
- GTF
1 stop8h 34m
United Airlines
Deal found 6/25![United Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:20 am
BIL
- ORD
1 stop5h 39m
Delta
Mon 8/175:57 pm
ORD
- BIL
1 stop6h 33m
Delta
Deal found 6/26![Delta logo]()
$333
This Alaska Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 11/312:55 pm
MSO
- ORD
2 stops15h 45m
Alaska Airlines
Sat 11/77:00 am
ORD
- MSO
1 stop9h 34m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$492
This United Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/34:00 pm
BIL
- ORD
1 stop6h 57m
United Airlines
Sat 11/73:55 pm
ORD
- BIL
1 stop7h 21m
United Airlines
Deal found 6/27![United Airlines logo]()
$361
This Delta deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” 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 10/225:30 am
MSO
- ORD
1 stop5h 25m
Delta
Tue 10/275:30 am
ORD
- MSO
2 stops13h 14m
Delta
Deal found 6/29![Delta logo]()
$334
This Alaska Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/34:48 pm
HLN
- ORD
1 stop12h 32m
Alaska Airlines
Wed 10/79:00 am
ORD
- HLN
1 stop8h 11m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$496
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 8/106:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Mon 8/175:00 am
ORD
- BIL
1 stop5h 41m
United Airlines
Deal found 6/28![United Airlines logo]()
$364
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/55:20 am
BIL
- ORD
2 stops9h 57m
Delta
Sun 9/135:50 pm
ORD
- BIL
1 stop6h 25m
Delta
Deal found 6/25![Delta logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:09 pm
HLN
- ORD
1 stop12h 11m
Alaska Airlines
Tue 8/48:20 pm
ORD
- HLN
1 stop21h 12m
Alaska Airlines
Deal found 6/26![Alaska Airlines logo]()
$533
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/142:25 pm
GTF
- ORD
1 stop6h 35m
United Airlines
Tue 8/186:00 am
ORD
- GTF
1 stop8h 29m
United Airlines
Deal found 6/28![United Airlines logo]()
$372
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:15 am
BZN
- ORD
1 stop5h 45m
Delta
Tue 8/48:28 am
ORD
- BZN
1 stop7h 22m
Delta
Deal found 6/26![Delta logo]()
$351
This Alaska Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/67:45 pm
FCA
- ORD
1 stop9h 35m
Alaska Airlines
Mon 10/127:16 pm
ORD
- FCA
1 stop18h 05m
Alaska Airlines
Deal found 6/27![Alaska Airlines logo]()
$541
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 10/242:37 pm
BZN
- ORD
1 stop7h 09m
United Airlines
Tue 10/279:10 am
ORD
- BZN
Nonstop3h 23m
United Airlines
Deal found 6/28![United Airlines logo]()
$381
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:40 am
MSO
- ORD
1 stop5h 45m
Delta
Mon 10/193:50 pm
ORD
- MSO
1 stop5h 22m
Delta
Deal found 6/26![Delta logo]()
$354
This Delta deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 9/165:30 am
BIL
- ORD
1 stop5h 25m
Delta
Mon 9/211:55 pm
ORD
- BIL
2 stops10h 20m
Delta
Deal found 6/27![Delta logo]()
$355
This Alaska Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 7/105:09 pm
HLN
- ORD
1 stop12h 11m
Alaska Airlines
Mon 7/136:00 am
ORD
- HLN
1 stop11h 32m
Alaska Airlines
Deal found 6/28![Alaska Airlines logo]()
$598
Last-minute flights from Montana to O'Hare IntlDiscover last-minute flight deals from Montana to O'Hare Intl. Data last updated June 29, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to O'Hare Intl. Data last updated June 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:24 am
BIL
- ORD
1 stop4h 08m
Delta
Sat 7/113:55 pm
ORD
- BIL
1 stop5h 04m
Delta
Deal found 6/25![Delta logo]()
$367
This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/1412:55 pm
HLN
- ORD
1 stop7h 34m
Delta
Sat 7/187:45 am
ORD
- HLN
1 stop5h 30m
Delta
Deal found 6/24![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 8/15:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 6/24![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/284:29 pm
BZN
- ORD
1 stop7h 15m
United Airlines
Tue 8/45:00 am
ORD
- BZN
1 stop5h 37m
United Airlines
Deal found 6/28![United Airlines logo]()
$320
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Tue 8/41:49 pm
ORD
- BZN
Nonstop3h 24m
American Airlines
Deal found 6/24![American Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Sat 8/12:59 pm
ORD
- BZN
1 stop7h 15m
American Airlines
Deal found 6/25![American Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:15 am
BZN
- ORD
1 stop5h 45m
Delta
Sat 8/13:55 pm
ORD
- BZN
1 stop4h 49m
Delta
Deal found 6/25![Delta logo]()
$305
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/295:15 am
BZN
- ORD
1 stop5h 45m
Delta
Fri 8/72:00 pm
ORD
- BZN
2 stops9h 42m
Delta
Deal found 6/25![Delta logo]()
$310
This American Airlines deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 7/305:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Sun 8/21:49 pm
ORD
- BZN
Nonstop3h 24m
American Airlines
Deal found 6/27![American Airlines logo]()
$286
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3012:48 pm
BZN
- ORD
Nonstop3h 09m
United Airlines
Sat 8/18:15 pm
ORD
- BZN
Nonstop3h 28m
United Airlines
Deal found 6/25![United Airlines logo]()
$307
This United Airlines deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3012:48 pm
BZN
- ORD
Nonstop3h 09m
United Airlines
Sun 8/26:00 am
ORD
- BZN
1 stop8h 20m
United Airlines
Deal found 6/25![United Airlines logo]()
$313
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Sun 8/21:49 pm
ORD
- BZN
Nonstop3h 24m
American Airlines
Deal found 6/24![American Airlines logo]()
$283
One-way flights from Montana to O'Hare IntlSearch for one-way flight options from Montana to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
Search for one-way flight options from Montana to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated June 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:06 pm
BZN
- ORD
1 stop20h 56m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$141
This American Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 7/295:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Deal found 6/28![American Airlines logo]()
$143
This United Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:30 pm
BZN
- ORD
1 stop7h 16m
United Airlines
Deal found 6/24![United Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/239:52 pm
MSO
- ORD
1 stop20h 10m
Multiple Airlines
Deal found 6/29![Multiple Airlines logo]()
$152
This Delta deal was found by Cheapflights users on 6/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:19 am
BZN
- ORD
1 stop7h 42m
Delta
Deal found 6/25![Delta logo]()
$153
This Delta deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:25 am
BZN
- ORD
2 stops12h 08m
Delta
Deal found 6/26![Delta logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 6/27. Clicking the “Pick Dates” 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 8/610:24 am
MSO
- ORD
1 stop18h 13m
Multiple Airlines
Deal found 6/27![Multiple Airlines logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/218:46 pm
FCA
- ORD
1 stop31h 56m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$162
This United Airlines deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” 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 12/268:00 am
BZN
- ORD
Nonstop3h 00m
United Airlines
Deal found 6/28![United Airlines logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/243:39 pm
FCA
- ORD
2 stops47h 20m
Multiple Airlines
Deal found 6/24![Multiple Airlines logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/248:58 pm
BIL
- ORD
2 stops42h 01m
Multiple Airlines
Deal found 6/28![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 6/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:52 pm
MSO
- ORD
1 stop20h 10m
Multiple Airlines
Deal found 6/26![Multiple Airlines logo]()
$170
Find flight deals from Montana to O'Hare Intl
Keep the following information in mind while searching for Montana to O'Hare Intl flight deals. Data was last updated June 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $271 (Delta) |
One-way from | $141 (Kiwi.com) |
Popular in | May |
Cheapest in | September |
Average price | $410 |
Good round-trip deal | $374 or less |
Good one-way deal | $201 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Montana to O'Hare Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 29, 2026.
Use the filters below to find and compare flights from Montana to Chicago O'Hare Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Fri 9/4
2:30 pm-10:46 pm
1 stop7h 16m
Chicago O'Hare Intl
Sat 9/19
5:30 pm-7:57 pm
Nonstop3h 27m
$291
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Tue 8/18
2:30 pm-10:46 pm
1 stop7h 16m
Chicago O'Hare Intl
Wed 8/19
5:00 am-9:39 am
1 stop5h 39m
$300
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Fri 9/4
3:14 pm-9:30 pm
1 stop5h 16m
Chicago O'Hare Intl
Sat 9/19
7:00 am-2:37 pm
1 stop8h 37m
$305
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Thu 10/22
8:30 am-9:53 pm
2 stops12h 23m
Chicago O'Hare Intl
Mon 10/26
1:55 pm-10:21 pm
2 stops9h 26m
$315
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Thu 9/17
1:15 pm-9:52 pm
1 stop7h 37m
Chicago O'Hare Intl
Sun 9/20
7:45 am-12:35 pm
1 stop5h 50m
$318
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Sat 9/12
2:25 pm-9:30 pm
1 stop6h 05m
Chicago O'Hare Intl
Sat 9/19
7:00 am-1:29 pm
1 stop7h 29m
$318
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Tue 7/28
4:29 pm-12:44 am
1 stop7h 15m
Chicago O'Hare Intl
Tue 8/4
5:00 am-9:37 am
1 stop5h 37m
$320
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Sat 7/25
6:00 pm-12:44 am
1 stop5h 44m
Chicago O'Hare Intl
Sat 8/1
5:00 am-9:35 am
1 stop5h 35m
$328
KalispellChicago
FCA - ORD
FCAORD
Kalispell Glacier Park
Sat 10/3
5:30 am-11:55 am
1 stop5h 25m
Chicago O'Hare Intl
Mon 10/5
8:25 am-1:25 pm
1 stop6h 00m
$329
KalispellChicago
FCA - ORD
FCAORD
Kalispell Glacier Park
Thu 10/8
3:36 pm-9:32 pm
1 stop4h 56m
Chicago O'Hare Intl
Sat 10/10
9:59 am-2:41 pm
1 stop5h 42m
$329
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Montana to O'Hare Intl
Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Montana with our price prediction graph.
BZN-ORD
MSO-ORD
FCA-ORD
BIL-ORD
HLN-ORD
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 Chicago O'Hare Intl Airport
USMT-ORD
BZN-ORD
MSO-ORD
FCA-ORD
BIL-ORD
What is the cheapest month to book a flight from Montana to Chicago O'Hare Intl Airport?
Currently, July is the cheapest month in which you can book a flight from Montana to Chicago O'Hare Intl Airport (average of $129). Flying from Montana to Chicago O'Hare Intl Airport in June is currently the most expensive (average of $300). 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 MT to ORD?
Find hourly flight availability from Montana to O'Hare Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 29, 2026.
When flying from Montana to Chicago O'Hare Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Weekly flight availability from Montana to Chicago O'Hare Intl Airport
Explore weekly flight availability from Montana to O'Hare Intl. 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 June 29, 2026.
The most flights from USMT to ORD are scheduled on a Monday (12 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Montana to Chicago O'Hare Intl Airport?
How far ahead should I book a flight from Montana to Chicago O'Hare Intl Airport?
The price you pay for your flight from Montana to Chicago O'Hare Intl Airport may vary depending on when you book. For the best chance of a lower fare, look to book 51 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
Related info for your journey
Find useful and relevant information for your journey from Montana to O'Hare Intl. 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 Chicago O'Hare Intl Airport?
Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locationsBenton Harbor
Rosemont
Schaumburg
Naperville
Lake Geneva
Oak Brook
Gurnee
Delavan
Oakbrook Terrace
Downers Grove
Des Plaines
South Holland
Libertyville
Hoffman Estates
Warrenville
Rockford
Racine
Great Lakes
Northbrook
Waukegan
Browse thousands of different options on Cheapflights for your next trip
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Other flights to O'Hare Intl
Explore flights to O'Hare Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 29, 2026.
Montana and O'Hare Intl flights
Browse other Montana and O'Hare Intl flight options. Last updated on June 29, 2026.
Popular flight searches
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Montana to O'Hare Intl flights
Consider these flights traveling from Montana to O'Hare Intl.
Top 4 airlines flying from Montana to O'Hare Intl
Discover the top 4 airlines that operate flights from Montana to O'Hare Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$129 | Average$446 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$166 | Average$467 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$191 | Average$361 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$229 | Average$448 | FlexibilityNo cancel fee | On-time69% |