$169+ Cheap flights from Great Falls (GTF) 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 6/29. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ORD
Apr 24 — May 11
Round-trip
1 adult, Economy
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Find cheap flights from Great Falls to O'Hare Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Great Falls to O'Hare Intl
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Cheapest flights from Great Falls to O'Hare IntlExplore the most affordable flight options available from Great Falls to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.
Explore the most affordable flight options available from Great Falls to O'Hare Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/199:26 pm
GTF
- ORD
2 stops35h 14m
Multiple Airlines
Sun 4/267:50 am
ORD
- GTF
1 stop13h 51m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/161:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Sat 5/237:45 am
ORD
- GTF
1 stop5h 42m
Delta
Deal found 3/22![Delta logo]()
$318
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/21:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Thu 6/119:30 am
ORD
- GTF
2 stops9h 09m
Delta
Deal found 3/20![Delta logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 3/24. 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.
Fri 6/1210:18 am
GTF
- ORD
2 stops33h 35m
Multiple Airlines
Sun 6/148:52 pm
ORD
- GTF
1 stop13h 36m
Multiple Airlines
Deal found 3/24![Multiple Airlines logo]()
$355
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/31:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Thu 6/119:30 am
ORD
- GTF
2 stops9h 09m
Delta
Deal found 3/20![Delta logo]()
$374
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/76:22 pm
GTF
- ORD
2 stops13h 08m
Delta
Sat 4/115:00 pm
ORD
- GTF
1 stop6h 30m
Delta
Deal found 3/23![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/72:30 pm
GTF
- ORD
1 stop5h 50m
United Airlines
Sat 4/112:30 pm
ORD
- GTF
1 stop7h 47m
United Airlines
Deal found 3/23![United Airlines logo]()
$401
Best flights from Great Falls to O'Hare IntlDiscover carefully curated flight deals from Great Falls to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2026.
Discover carefully curated flight deals from Great Falls to O'Hare Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 25, 2026.
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/21:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Thu 6/119:30 am
ORD
- GTF
2 stops9h 09m
Delta
Deal found 3/20![Delta logo]()
$349
This Kiwi.com deal was found by Cheapflights users on 3/24. 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.
Fri 6/1210:18 am
GTF
- ORD
1 stop18h 07m
Multiple Airlines
Sun 6/148:52 pm
ORD
- GTF
1 stop13h 36m
Multiple Airlines
Deal found 3/24![Multiple Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/162:35 pm
GTF
- ORD
1 stop5h 48m
United Airlines
Sat 5/238:40 am
ORD
- GTF
Nonstop3h 43m
United Airlines
Deal found 3/22![United Airlines logo]()
$401
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/145:06 pm
GTF
- ORD
2 stops19h 07m
Alaska Airlines
Fri 4/178:00 am
ORD
- GTF
1 stop9h 26m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$469
This Delta deal was found by Cheapflights users on 3/24. 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 4/91:05 pm
GTF
- ORD
1 stop7h 29m
Delta
Mon 4/131:36 pm
ORD
- GTF
2 stops9h 53m
Delta
Deal found 3/24![Delta logo]()
$384
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/165:40 am
GTF
- ORD
2 stops13h 34m
Delta
Sat 5/231:44 pm
ORD
- GTF
2 stops9h 42m
Delta
Deal found 3/22![Delta logo]()
$416
This United Airlines deal was found by Cheapflights users on 3/24. 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 5/146:15 am
GTF
- ORD
1 stop17h 43m
United Airlines
Tue 5/199:54 pm
ORD
- GTF
1 stop16h 40m
United Airlines
Deal found 3/24![United Airlines logo]()
$582
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/31:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Tue 6/96:00 am
ORD
- GTF
2 stops12h 39m
Delta
Deal found 3/20![Delta logo]()
$497
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/21:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Sun 6/76:00 am
ORD
- GTF
2 stops17h 44m
Delta
Deal found 3/20![Delta logo]()
$563
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” 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 6/31:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Sun 6/76:00 am
ORD
- GTF
2 stops17h 44m
Delta
Deal found 3/20![Delta logo]()
$588
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/146:20 pm
GTF
- ORD
2 stops13h 20m
Delta
Fri 4/176:25 am
ORD
- GTF
2 stops12h 15m
Delta
Deal found 3/22![Delta logo]()
$613
Last-minute flights from Great Falls to O'Hare IntlDiscover last-minute flight deals from Great Falls to O'Hare Intl. Data last updated March 25, 2026 and is based on user searches.
Discover last-minute flight deals from Great Falls to O'Hare Intl. Data last updated March 25, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 3/246:15 am
GTF
- ORD
1 stop7h 35m
United Airlines
Tue 3/312:35 pm
ORD
- GTF
1 stop7h 42m
United Airlines
Deal found 3/22![United Airlines logo]()
$548
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 3/241:05 pm
GTF
- ORD
1 stop7h 29m
Delta
Tue 3/315:30 am
ORD
- GTF
2 stops13h 12m
Delta
Deal found 3/22![Delta logo]()
$554
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/76:22 pm
GTF
- ORD
2 stops13h 08m
Delta
Sat 4/115:00 pm
ORD
- GTF
1 stop6h 30m
Delta
Deal found 3/23![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 4/72:30 pm
GTF
- ORD
1 stop5h 50m
United Airlines
Sat 4/112:30 pm
ORD
- GTF
1 stop7h 47m
United Airlines
Deal found 3/23![United Airlines logo]()
$401
This Delta deal was found by Cheapflights users on 3/24. 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 4/91:05 pm
GTF
- ORD
1 stop7h 29m
Delta
Mon 4/137:35 am
ORD
- GTF
1 stop5h 52m
Delta
Deal found 3/24![Delta logo]()
$413
This Alaska Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/145:06 pm
GTF
- ORD
1 stop12h 33m
Alaska Airlines
Fri 4/178:00 am
ORD
- GTF
1 stop9h 26m
Alaska Airlines
Deal found 3/22![Alaska Airlines logo]()
$424
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/199:26 pm
GTF
- ORD
2 stops35h 14m
Multiple Airlines
Sun 4/267:50 am
ORD
- GTF
1 stop13h 51m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$313
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 4/196:20 pm
GTF
- ORD
2 stops13h 17m
Delta
Sun 4/265:15 am
ORD
- GTF
2 stops13h 25m
Delta
Deal found 3/22![Delta logo]()
$489
One-way flights from Great Falls to O'Hare IntlSearch for one-way flight options from Great Falls to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated March 25, 2026.
Search for one-way flight options from Great Falls to O'Hare Intl. Find affordable one-way fares based on user searches. Data last updated March 25, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” 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 6/2910:18 am
GTF
- ORD
1 stop25h 41m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 8/710:19 am
GTF
- ORD
1 stop18h 25m
Multiple Airlines
Deal found 3/22![Multiple Airlines logo]()
$234
This Delta deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” 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 5/61:09 pm
GTF
- ORD
1 stop7h 36m
Delta
Deal found 3/22![Delta logo]()
$288
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Mon 7/202:37 pm
GTF
- ORD
1 stop7h 42m
United Airlines
Deal found 3/24![United Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” 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 5/55:30 am
GTF
- ORD
1 stop5h 21m
Delta
Deal found 3/23![Delta logo]()
$373
This Alaska Airlines deal was found by Cheapflights users on 3/24. 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.
Mon 7/205:03 pm
GTF
- ORD
2 stops19h 13m
Alaska Airlines
Deal found 3/24![Alaska Airlines logo]()
$466
Find flight deals from Great Falls to O'Hare Intl
Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) to O'Hare Intl (ORD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $313 (Kiwi.com) |
One-way from | $169 (Kiwi.com) |
Good round-trip deal | $533 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Great Falls 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 March 25, 2026.
Use the filters below to find and compare flights from Great Falls to Chicago O'Hare Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Tue 6/2
1:07 pm-9:50 pm
1 stop7h 43m
Chicago O'Hare Intl
Thu 6/11
9:30 am-5:39 pm
2 stops9h 09m
$349
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Fri 6/12
10:18 am-5:25 am
1 stop18h 07m
Chicago O'Hare Intl
Sun 6/14
8:52 pm-9:28 am
1 stop13h 36m
$377
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Thu 4/9
1:05 pm-9:34 pm
1 stop7h 29m
Chicago O'Hare Intl
Mon 4/13
1:36 pm-10:29 pm
2 stops9h 53m
$384
Quickest round-trip
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Sat 5/16
2:35 pm-9:23 pm
1 stop5h 48m
Chicago O'Hare Intl
Sat 5/23
8:40 am-11:23 am
Nonstop3h 43m
$401
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Sat 5/16
5:40 am-8:14 pm
2 stops13h 34m
Chicago O'Hare Intl
Sat 5/23
1:44 pm-10:26 pm
2 stops9h 42m
$416
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Tue 4/14
5:06 pm-1:13 pm
2 stops19h 07m
Chicago O'Hare Intl
Fri 4/17
8:00 am-4:26 pm
1 stop9h 26m
$469
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Wed 6/3
1:07 pm-9:50 pm
1 stop7h 43m
Chicago O'Hare Intl
Tue 6/9
6:00 am-5:39 pm
2 stops12h 39m
$497
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Tue 6/2
1:07 pm-9:50 pm
1 stop7h 43m
Chicago O'Hare Intl
Sun 6/7
6:00 am-10:44 pm
2 stops17h 44m
$563
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Thu 5/14
6:15 am-12:58 am
1 stop17h 43m
Chicago O'Hare Intl
Tue 5/19
9:54 pm-1:34 pm
1 stop16h 40m
$582
Great FallsChicago
GTF - ORD
GTFORD
Great Falls
Wed 6/3
1:07 pm-9:50 pm
1 stop7h 43m
Chicago O'Hare Intl
Sun 6/7
6:00 am-10:44 pm
2 stops17h 44m
$588
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Great Falls to O'Hare Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Great Falls to O'Hare Intl in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Great Falls-Chicago O'Hare Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Great Falls-Chicago O'Hare Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Great Falls-Chicago O'Hare Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Great Falls-Chicago O'Hare Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Great Falls-Chicago O'Hare Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Great Falls to O'Hare Intl
Have a flexible travel schedule? Discover the best time to fly to O'Hare Intl from Great Falls with our price prediction graph.
GTF-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.
Reviews of airlines servicing O'Hare Intl
Get insights into the airlines that provide service to O'Hare Intl. 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 O'Hare Intl. Reviews last updated March 25, 2026.
Peruse reviews from past customers who have flown with United Airlines from Great Falls to Chicago O'Hare Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.1
Crew
8.1
Food
6.6
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Oct 2025
YUL - ORD
Entertainment
7.1
Crew
8.1
Food
6.6
Comfort
7.3
Overall
7.4
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentAnonymous,Oct 2025
YUL - ORD
Related info for your journey
Find useful and relevant information for your journey from Great Falls 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 locationsSchaumburg
Rosemont
Gurnee
Naperville
Lake Geneva
Hoffman Estates
Delavan
Downers Grove
Des Plaines
Elgin
Oakbrook Terrace
Oak Brook
South Holland
Elk Grove Village
Libertyville
Waukegan
Beloit
Warrenville
Bridgeview
Great Lakes
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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 March 25, 2026.
Great Falls and O'Hare Intl flights
Browse other Great Falls and O'Hare Intl flight options. Last updated on March 25, 2026.
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Top airline flying from Great Falls to O'Hare Intl
Discover the top airline that operate flights from Great Falls 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 March 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$277 | Average$591 | FlexibilityNo cancel fee | On-time69% |