$219+ Cheap flights from Ontario to Great Falls (ONT - GTF)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — GTF
Nov 3 — Nov 101
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Great Falls 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 Ontario to Great Falls
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Best
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Cheapest flights from Ontario to Great FallsExplore the most affordable flight options available from Ontario to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 4, 2026.
Explore the most affordable flight options available from Ontario to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 4, 2026.
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:00 am -
1 stop5h 38m
Wed 11/46:27 pm -
1 stop4h 44m
Deal found 10/3![Delta logo]()
$338
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:00 am -
1 stop7h 41m
Mon 10/196:15 am -
1 stop7h 31m
Deal found 9/30![United Airlines logo]()
$388
This Alaska Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am -
1 stop9h 30m
Sat 11/75:10 pm -
2 stops17h 42m
Deal found 10/1![Alaska Airlines logo]()
$411
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:00 am -
1 stop7h 49m
Mon 11/92:45 pm -
1 stop7h 06m
Deal found 10/2![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/129:25 am -
2 stops11h 13m
Sun 11/152:45 pm -
1 stop7h 06m
Deal found 9/29![United Airlines logo]()
$457
This Alaska Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:13 pm -
1 stop20h 17m
Fri 11/135:10 pm -
1 stop19h 08m
Deal found 9/30![Alaska Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:25 am -
2 stops11h 13m
Sun 11/222:45 pm -
1 stop7h 06m
Deal found 10/2![United Airlines logo]()
$485
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:24 pm -
1 stop6h 58m
Sun 10/186:15 am -
1 stop7h 31m
Deal found 9/29![United Airlines logo]()
$488
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 11/106:00 am -
1 stop5h 41m
Tue 11/106:19 pm -
1 stop6h 30m
Deal found 9/29![Delta logo]()
$494
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:24 pm -
1 stop6h 58m
Sun 11/12:45 pm -
1 stop7h 06m
Deal found 10/1![United Airlines logo]()
$508
Best flights from Ontario to Great FallsDiscover carefully curated flight deals from Ontario to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
Discover carefully curated flight deals from Ontario to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 9/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/307:00 am -
1 stop7h 28m
Tue 2/24:08 pm -
1 stop7h 33m
Deal found 9/29![Alaska Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/41:29 pm -
1 stop7h 09m
Sat 11/76:30 am -
1 stop7h 03m
Deal found 10/1![United Airlines logo]()
$338
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:00 am -
1 stop7h 41m
Mon 10/196:15 am -
1 stop7h 31m
Deal found 9/30![United Airlines logo]()
$388
This Alaska Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:13 pm -
1 stop20h 17m
Fri 11/135:10 pm -
1 stop19h 08m
Deal found 9/30![Alaska Airlines logo]()
$462
This United Airlines deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/91:40 pm -
1 stop6h 33m
Wed 12/162:47 pm -
1 stop7h 24m
Deal found 10/3![United Airlines logo]()
$438
Last-minute flights from Ontario to Great FallsDiscover last-minute flight deals from Ontario to Great Falls. Data last updated October 4, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Great Falls. Data last updated October 4, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/91:24 pm -
1 stop6h 58m
Sun 11/12:45 pm -
1 stop7h 06m
Deal found 10/1![United Airlines logo]()
$508
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/141:24 pm -
1 stop6h 58m
Sun 10/186:15 am -
1 stop7h 31m
Deal found 9/29![United Airlines logo]()
$488
This United Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:00 am -
1 stop7h 41m
Mon 10/196:15 am -
1 stop7h 31m
Deal found 9/30![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/285:00 am -
1 stop7h 49m
Mon 11/92:45 pm -
1 stop7h 06m
Deal found 10/2![United Airlines logo]()
$438
This Delta deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:00 am -
1 stop5h 38m
Wed 11/46:27 pm -
1 stop4h 44m
Deal found 10/3![Delta logo]()
$338
This Alaska Airlines deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/46:00 am -
1 stop9h 30m
Sat 11/75:10 pm -
2 stops17h 42m
Deal found 10/1![Alaska Airlines logo]()
$411
This Alaska Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:13 pm -
1 stop20h 17m
Fri 11/135:10 pm -
1 stop19h 08m
Deal found 9/30![Alaska Airlines logo]()
$462
This Delta deal was found by Cheapflights users on 9/29. 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.
Tue 11/106:00 am -
1 stop5h 41m
Tue 11/106:19 pm -
1 stop6h 30m
Deal found 9/29![Delta logo]()
$494
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/129:25 am -
2 stops11h 13m
Sun 11/152:45 pm -
1 stop7h 06m
Deal found 9/29![United Airlines logo]()
$457
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:25 am -
2 stops11h 13m
Sun 11/222:45 pm -
1 stop7h 06m
Deal found 10/2![United Airlines logo]()
$485
One-way flights from Ontario to Great FallsSearch for one-way flight options from Ontario to Great Falls. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
Search for one-way flight options from Ontario to Great Falls. Find affordable one-way fares based on user searches. Data last updated October 4, 2026.
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/315:00 am -
1 stop7h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![United Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:22 pm -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![United Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/225:00 am -
1 stop7h 49m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$269
This Delta deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/89:45 am -
1 stop7h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![Delta logo]()
$271
This United Airlines deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/131:22 pm -
1 stop7h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/2![United Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/175:00 am -
1 stop7h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$347
This Priceline deal was found by Cheapflights users on 10/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/256:00 am -
1 stop9h 32m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/3![Alaska Airlines logo]()
$378
This Alaska Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:13 pm -
1 stop26h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$383
This Alaska Airlines deal was found by Cheapflights users on 9/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/86:02 am -
1 stop9h 33m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/30![Alaska Airlines logo]()
$400
This United Airlines deal was found by Cheapflights users on 9/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:24 pm -
1 stop6h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/29![United Airlines logo]()
$402
Find flight deals from Ontario to Great Falls
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Great Falls (GTF). 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 October 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $338 (Alaska Airlines) |
One-way from | $219 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Great Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
Use the filters below to find and compare flights from Ontario to Great Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Sat 10/31
5:00 am-1:49 pm
1 stop7h 49m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$219
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Sat 10/17
1:22 pm-9:22 pm
1 stop7h 00m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$244
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Sun 11/22
5:00 am-1:49 pm
1 stop7h 49m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$269
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Thu 10/8
9:45 am-5:47 pm
1 stop7h 02m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$324
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Sat 1/30
7:00 am-3:28 pm
1 stop7h 28m
Great Falls
Tue 2/2
4:08 pm-10:41 pm
1 stop7h 33m
$338
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Wed 11/4
1:29 pm-9:38 pm
1 stop7h 09m
Great Falls
Sat 11/7
6:30 am-12:33 pm
1 stop7h 03m
$338
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Thu 12/17
5:00 am-1:41 pm
1 stop7h 41m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$347
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Fri 12/25
6:00 am-4:32 pm
1 stop9h 32m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$378
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Thu 10/15
5:00 am-1:41 pm
1 stop7h 41m
Great Falls
Mon 10/19
6:15 am-12:46 pm
1 stop7h 31m
$388
OntarioGreat Falls
ONT Ontario - GTF Great Falls
ONTGTF
Ontario
Thu 10/8
6:02 am-4:35 pm
1 stop9h 33m
Great Falls
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$400
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Ontario to Great Falls
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 Ontario to Great Falls in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Great Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Great Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Great Falls flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Great Falls 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 Ontario-Great Falls 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 Ontario to Great Falls
Have a flexible travel schedule? Discover the best time to fly to Great Falls from Ontario with our price prediction graph.
ONT-GTF
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Reviews of airlines servicing Great Falls
Get insights into the airlines that provide service to Great Falls. 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 Great Falls. Reviews last updated October 4, 2026.
Read through reviews of airlines operating flights from Ontario to Great Falls, such as Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Crew
8.5
Comfort
7.8
Overall
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Entertainment
7.8
Crew
8.5
Comfort
7.8
Overall
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
10.0
ExcellentMichael,Sep 2023
SMF - ATL
Related info for your journey
Find useful and relevant information for your journey from Ontario to Great Falls. 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 Great Falls?
Book flights to Great Falls if you plan to visit one of these locationsShelby
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Other flights to Great Falls
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Ontario and Great Falls flights
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Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on October 4, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top airline flying from Ontario to Great Falls
Discover the top airline that operate flights from Ontario to Great Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated October 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$340 | Average$557 | FlexibilityNo cancel fee | On-timeN/A |