$122+ 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 7/3. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ORD
Jun 9 — Jun 161
Round-trip
1 adult, Economy
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Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from Montana to 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 May 10, 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 May 10, 2026.
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:02 pm
BIL
- ORD
Nonstop2h 58m
American Airlines
Sat 10/249:40 am
ORD
- BIL
Nonstop3h 02m
American Airlines
Deal found 5/8![American Airlines logo]()
$251
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:51 am
BIL
- ORD
1 stop5h 28m
Delta
Sat 8/153:48 pm
ORD
- BIL
1 stop5h 24m
Delta
Deal found 5/5![Delta logo]()
$271
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:51 am
BIL
- ORD
1 stop5h 28m
Delta
Wed 8/122:12 pm
ORD
- BIL
2 stops10h 01m
Delta
Deal found 5/5![Delta logo]()
$276
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:20 am
BIL
- ORD
1 stop5h 40m
Delta
Wed 7/85:54 pm
ORD
- BIL
1 stop6h 26m
Delta
Deal found 5/6![Delta logo]()
$281
This United Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/28:00 am
BZN
- ORD
Nonstop2h 59m
United Airlines
Sun 7/58:15 pm
ORD
- BZN
Nonstop3h 28m
United Airlines
Deal found 5/6![United Airlines logo]()
$285
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/412:39 pm
BZN
- ORD
Nonstop3h 21m
American Airlines
Sun 6/71:30 pm
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 5/5![American Airlines logo]()
$286
This American Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:00 pm
BZN
- ORD
Nonstop3h 20m
American Airlines
Sun 6/71:30 pm
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 5/7![American Airlines logo]()
$287
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:51 am
BIL
- ORD
1 stop5h 28m
Delta
Thu 8/135:57 pm
ORD
- BIL
1 stop6h 16m
Delta
Deal found 5/5![Delta logo]()
$290
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:37 pm
BZN
- ORD
1 stop7h 04m
United Airlines
Tue 9/297:55 pm
ORD
- BZN
Nonstop3h 23m
United Airlines
Deal found 5/8![United Airlines logo]()
$291
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:25 pm
BZN
- ORD
Nonstop3h 15m
United Airlines
Mon 6/155:00 am
ORD
- BZN
1 stop5h 37m
United Airlines
Deal found 5/7![United Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:10 am
BIL
- ORD
1 stop5h 49m
Delta
Tue 8/118:28 am
ORD
- BIL
2 stops10h 25m
Delta
Deal found 5/5![Delta logo]()
$295
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:55 pm
COD
- ORD
1 stop5h 49m
United Airlines
Tue 6/305:00 am
ORD
- COD
1 stop5h 28m
United Airlines
Deal found 5/8![United Airlines logo]()
$298
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 May 10, 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 May 10, 2026.
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 7/255:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/5![United Airlines logo]()
$271
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:20 am
BIL
- ORD
1 stop5h 40m
Delta
Tue 7/78:27 am
ORD
- BIL
2 stops10h 25m
Delta
Deal found 5/10![Delta logo]()
$303
This Alaska Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:13 pm
MSO
- ORD
1 stop6h 46m
Alaska Airlines
Sat 9/57:00 am
ORD
- MSO
1 stop7h 25m
Alaska Airlines
Deal found 5/9![Alaska Airlines logo]()
$329
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/253:51 pm
FCA
- ORD
1 stop7h 48m
American Airlines
Tue 6/301:16 pm
ORD
- FCA
Nonstop3h 46m
American Airlines
Deal found 5/5![American Airlines logo]()
$349
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/154:25 pm
BZN
- ORD
Nonstop3h 15m
United Airlines
Mon 6/295:00 am
ORD
- BZN
1 stop5h 37m
United Airlines
Deal found 5/9![United Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/211:27 am
BZN
- ORD
1 stop4h 35m
Delta
Sun 7/57:45 am
ORD
- BZN
1 stop7h 50m
Delta
Deal found 5/10![Delta logo]()
$305
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:55 pm
COD
- ORD
1 stop5h 49m
United Airlines
Tue 6/305:00 am
ORD
- COD
1 stop5h 28m
United Airlines
Deal found 5/8![United Airlines logo]()
$298
This Alaska Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:15 am
FCA
- ORD
1 stop9h 33m
Alaska Airlines
Sat 6/65:52 pm
ORD
- FCA
1 stop7h 06m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/51:00 pm
BZN
- ORD
1 stop7h 50m
Delta
Tue 6/97:37 pm
ORD
- BZN
1 stop5h 46m
Delta
Deal found 5/5![Delta logo]()
$305
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/22:30 pm
BZN
- ORD
1 stop7h 16m
United Airlines
Wed 9/95:00 am
ORD
- BZN
1 stop5h 45m
United Airlines
Deal found 5/9![United Airlines logo]()
$300
This Alaska Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:45 pm
FCA
- ORD
1 stop9h 35m
Alaska Airlines
Wed 10/286:00 am
ORD
- FCA
1 stop7h 21m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/75:45 am
BIL
- ORD
1 stop5h 36m
Delta
Mon 9/143:50 pm
ORD
- BIL
1 stop4h 47m
Delta
Deal found 5/5![Delta logo]()
$309
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:45 am
BZN
- ORD
2 stops10h 03m
Delta
Mon 9/215:20 pm
ORD
- BZN
1 stop7h 33m
Delta
Deal found 5/5![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/254:29 pm
BZN
- ORD
1 stop7h 15m
United Airlines
Sun 6/288:15 pm
ORD
- BZN
Nonstop3h 28m
United Airlines
Deal found 5/8![United Airlines logo]()
$313
This Alaska Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:52 pm
GTF
- ORD
1 stop10h 28m
Alaska Airlines
Wed 6/106:00 am
ORD
- GTF
1 stop11h 29m
Alaska Airlines
Deal found 5/7![Alaska Airlines logo]()
$373
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” 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 6/1111:27 am
BZN
- ORD
2 stops8h 04m
Delta
Fri 6/127:37 pm
ORD
- BZN
1 stop5h 46m
Delta
Deal found 5/10![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:20 pm
MSO
- ORD
1 stop6h 24m
United Airlines
Sun 7/58:40 am
ORD
- MSO
Nonstop3h 52m
United Airlines
Deal found 5/7![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/145:15 am
BZN
- ORD
1 stop5h 45m
Delta
Wed 6/176:30 am
ORD
- BZN
1 stop4h 52m
Delta
Deal found 5/8![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Sat 6/135:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/9![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/135:15 am
BZN
- ORD
1 stop5h 44m
Delta
Fri 7/177:40 pm
ORD
- BZN
1 stop5h 43m
Delta
Deal found 5/7![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/212:31 pm
GTF
- ORD
1 stop6h 11m
United Airlines
Tue 8/254:35 pm
ORD
- GTF
1 stop5h 53m
United Airlines
Deal found 5/5![United Airlines logo]()
$341
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:30 am
GTF
- ORD
1 stop5h 51m
Delta
Mon 9/217:30 am
ORD
- GTF
1 stop5h 53m
Delta
Deal found 5/5![Delta logo]()
$318
This Alaska Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:52 pm
GTF
- ORD
2 stops24h 07m
Alaska Airlines
Tue 6/911:05 am
ORD
- GTF
2 stops30h 24m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/612:35 pm
FCA
- ORD
Nonstop3h 30m
United Airlines
Fri 6/128:40 am
ORD
- FCA
Nonstop3h 49m
United Airlines
Deal found 5/9![United Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/215:40 am
GTF
- ORD
2 stops11h 48m
Delta
Tue 8/2511:26 am
ORD
- GTF
2 stops12h 22m
Delta
Deal found 5/5![Delta logo]()
$329
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:54 pm
COD
- ORD
1 stop7h 55m
United Airlines
Wed 5/276:17 pm
ORD
- COD
1 stop5h 26m
United Airlines
Deal found 5/8![United Airlines logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/25:11 pm
HLN
- ORD
1 stop12h 11m
Alaska Airlines
Sat 9/59:00 am
ORD
- HLN
1 stop8h 34m
Alaska Airlines
Deal found 5/5![Alaska Airlines logo]()
$515
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/25:55 am
MSO
- ORD
1 stop8h 10m
Delta
Fri 7/105:54 pm
ORD
- MSO
1 stop6h 50m
Delta
Deal found 5/6![Delta logo]()
$329
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/245:55 am
MSO
- ORD
1 stop8h 10m
Delta
Tue 7/285:18 pm
ORD
- MSO
2 stops8h 10m
Delta
Deal found 5/9![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:00 pm
BIL
- ORD
1 stop5h 44m
United Airlines
Fri 6/125:00 am
ORD
- BIL
1 stop5h 35m
United Airlines
Deal found 5/7![United Airlines logo]()
$384
Last-minute flights from Montana to O'Hare IntlDiscover last-minute flight deals from Montana to O'Hare Intl. Data last updated May 10, 2026 and is based on user searches.
Discover last-minute flight deals from Montana to O'Hare Intl. Data last updated May 10, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/291:25 pm
FCA
- ORD
Nonstop3h 39m
American Airlines
Tue 6/29:45 am
ORD
- FCA
Nonstop3h 50m
American Airlines
Deal found 5/6![American Airlines logo]()
$309
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/312:33 pm
MSO
- ORD
Nonstop3h 32m
United Airlines
Sat 6/68:40 am
ORD
- MSO
Nonstop3h 52m
United Airlines
Deal found 5/7![United Airlines logo]()
$309
This American Airlines deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/412:39 pm
BZN
- ORD
Nonstop3h 21m
American Airlines
Sun 6/71:30 pm
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 5/5![American Airlines logo]()
$286
This American Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:00 pm
BZN
- ORD
Nonstop3h 20m
American Airlines
Sun 6/71:30 pm
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 5/7![American Airlines logo]()
$287
This American Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1112:26 pm
BZN
- ORD
Nonstop3h 21m
American Airlines
Sun 6/141:30 pm
ORD
- BZN
Nonstop3h 20m
American Airlines
Deal found 5/6![American Airlines logo]()
$285
This United Airlines deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/114:25 pm
BZN
- ORD
Nonstop3h 15m
United Airlines
Mon 6/155:00 am
ORD
- BZN
1 stop5h 37m
United Airlines
Deal found 5/7![United Airlines logo]()
$295
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:00 am
BZN
- ORD
2 stops11h 29m
Delta
Fri 6/127:37 pm
ORD
- BZN
1 stop5h 46m
Delta
Deal found 5/9![Delta logo]()
$310
This United Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/165:55 pm
COD
- ORD
1 stop5h 49m
United Airlines
Tue 6/305:00 am
ORD
- COD
1 stop5h 28m
United Airlines
Deal found 5/8![United Airlines logo]()
$298
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:20 am
BIL
- ORD
1 stop5h 40m
Delta
Wed 7/85:54 pm
ORD
- BIL
1 stop6h 26m
Delta
Deal found 5/6![Delta logo]()
$281
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/254:17 pm
BZN
- ORD
1 stop7h 22m
American Airlines
Mon 6/295:00 am
ORD
- BZN
1 stop8h 39m
American Airlines
Deal found 5/8![American Airlines logo]()
$306
This Delta deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:24 am
BIL
- ORD
2 stops9h 34m
Delta
Wed 7/11:40 pm
ORD
- BIL
2 stops10h 20m
Delta
Deal found 5/5![Delta logo]()
$300
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/3011:50 am
BIL
- ORD
1 stop6h 08m
Delta
Fri 7/31:40 pm
ORD
- BIL
2 stops10h 20m
Delta
Deal found 5/6![Delta logo]()
$305
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 May 10, 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 May 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/310:30 am
FCA
- ORD
1 stop17h 37m
Multiple Airlines
Deal found 5/5![Multiple Airlines logo]()
$122
This Alaska Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:00 am
BZN
- ORD
1 stop8h 01m
Alaska Airlines
Deal found 5/6![Alaska Airlines logo]()
$133
This American Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Deal found 5/6![American Airlines logo]()
$143
This American Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/125:03 pm
BZN
- ORD
Nonstop3h 27m
American Airlines
Deal found 5/9![American Airlines logo]()
$144
This United Airlines deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:37 pm
BZN
- ORD
1 stop7h 07m
United Airlines
Deal found 5/6![United Airlines logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/2910:00 am
BIL
- ORD
2 stops33h 43m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$148
This Delta deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/55:15 am
BZN
- ORD
1 stop5h 45m
Delta
Deal found 5/6![Delta logo]()
$153
This American Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:17 pm
BIL
- ORD
Nonstop2h 53m
American Airlines
Deal found 5/9![American Airlines logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/39:59 am
BIL
- ORD
1 stop18h 08m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 5/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/24:48 pm
BZN
- ORD
2 stops36h 31m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:00 am
BZN
- ORD
1 stop4h 59m
Delta
Deal found 5/8![Delta logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 5/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:06 pm
BZN
- ORD
2 stops22h 47m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$162
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 May 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $251 (American Airlines) |
One-way from | $122 (Kiwi.com) |
Popular in | May |
Cheapest in | September |
Average price | $403 |
Good round-trip deal | $378 or less |
Good one-way deal | $229 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 May 10, 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
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Sat 7/18
6:00 pm-12:44 am
1 stop5h 44m
Chicago O'Hare Intl
Sat 7/25
5:00 am-9:35 am
1 stop5h 35m
$271
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Mon 6/15
4:25 pm-8:40 pm
Nonstop3h 15m
Chicago O'Hare Intl
Mon 6/29
5:00 am-9:37 am
1 stop5h 37m
$295
CodyChicago
COD - ORD
CODORD
Cody E.E. Faust
Tue 6/16
5:55 pm-12:44 am
1 stop5h 49m
Chicago O'Hare Intl
Tue 6/30
5:00 am-9:28 am
1 stop5h 28m
$298
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Wed 9/2
2:30 pm-10:46 pm
1 stop7h 16m
Chicago O'Hare Intl
Wed 9/9
5:00 am-9:45 am
1 stop5h 45m
$300
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Thu 7/2
5:20 am-12:00 pm
1 stop5h 40m
Chicago O'Hare Intl
Tue 7/7
8:27 am-5:52 pm
2 stops10h 25m
$303
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Thu 7/2
11:27 am-5:02 pm
1 stop4h 35m
Chicago O'Hare Intl
Sun 7/5
7:45 am-2:35 pm
1 stop7h 50m
$305
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Fri 6/5
1:00 pm-9:50 pm
1 stop7h 50m
Chicago O'Hare Intl
Tue 6/9
7:37 pm-12:23 am
1 stop5h 46m
$305
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Mon 9/7
5:45 am-12:21 pm
1 stop5h 36m
Chicago O'Hare Intl
Mon 9/14
3:50 pm-7:37 pm
1 stop4h 47m
$309
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Sat 9/19
5:45 am-4:48 pm
2 stops10h 03m
Chicago O'Hare Intl
Mon 9/21
5:20 pm-11:53 pm
1 stop7h 33m
$310
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Thu 6/11
11:27 am-8:31 pm
2 stops8h 04m
Chicago O'Hare Intl
Fri 6/12
7:37 pm-12:23 am
1 stop5h 46m
$310
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.
BIL-ORD
BZN-ORD
COD-ORD
FCA-ORD
MSO-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
BIL-ORD
BZN-ORD
COD-ORD
FCA-ORD
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 88 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Montana to Chicago O'Hare Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Montana to Chicago O'Hare Intl Airport (average of $133). Flying from Montana to Chicago O'Hare Intl Airport in November is currently the most expensive (average of $279). 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 May 10, 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 May 10, 2026.
The most flights from USMT to ORD are scheduled on a Thursday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Montana to Chicago O'Hare Intl Airport?
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 locationsRosemont
Schaumburg
Naperville
Gurnee
Delavan
Oakbrook Terrace
Lake Geneva
Benton Harbor
Hoffman Estates
Downers Grove
Des Plaines
Oak Brook
South Holland
Libertyville
Warrenville
Elk Grove Village
Bridgeview
Great Lakes
Lansing
Arlington Heights
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 May 10, 2026.
Montana and O'Hare Intl flights
Browse other Montana and O'Hare Intl flight options. Last updated on May 10, 2026.
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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 May 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$129 | Average$426 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$166 | Average$467 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$191 | Average$345 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$229 | Average$442 | FlexibilityNo cancel fee | On-time69% |