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$293+ Cheap flights from Great Falls to Ontario (GTF - ONT)

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 12/16. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ONT
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Great Falls to Ontario

Cheapest flights from Great Falls to Ontario
Explore the most affordable flight options available from Great Falls to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/2. 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 12/132:35 pmGTF - ONT
1 stop7h 07mUnited Airlines
Sun 1/45:05 amONT - GTF
1 stop7h 34mUnited Airlines
Deal found 12/2$707
This Alaska Airlines deal was found by Cheapflights users on 12/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:35 pmGTF - ONT
1 stop23h 58mAlaska Airlines
Sun 1/47:00 amONT - GTF
2 stops10h 41mAlaska Airlines
Deal found 12/2$858

Find flight deals from Great Falls to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) to Ontario (ONT). 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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$318
(Delta)

One-way from

$293
(United Airlines)

Popular in

July

Cheapest in

February

Average price

$393
Provider with most accurate pricing for Great Falls-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Great Falls-Ontario flights.
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From Great Falls to Ontario
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One-way flight from Great Falls to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Great Falls to Ontario 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 December 4, 2025.
Use the filters below to find and compare flights from Great Falls to Ontario that are best for you.

Fly from

Great Falls

Fly to

Ontario

Route

Depart

Return

Price

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 1/26

1:12 pm-4:15 pm

1 stop4h 03m

Ontario

Thu 1/29

6:00 am-12:32 pm

1 stop5h 32m

$318

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 1/26

5:59 pm-1:06 pm

2 stops20h 07m

Ontario

Thu 1/29

1:46 pm-5:19 pm

2 stops26h 33m

$323

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 1/1

7:21 pm-12:14 am

1 stop5h 53m

Ontario

Thu 1/8

6:00 am-5:19 pm

1 stop10h 19m

$349

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 4/6

4:00 pm-10:38 pm

1 stop7h 38m

Ontario

Fri 4/10

6:00 am-3:20 pm

1 stop8h 20m

$401

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 4/6

4:00 pm-10:38 pm

1 stop7h 38m

Ontario

Fri 4/10

6:00 pm-3:20 pm

2 stops20h 20m

$575

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 2/13

4:57 pm-11:32 pm

1 stop7h 35m

Ontario

Mon 2/16

6:14 am-4:17 pm

1 stop9h 03m

$634

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Tue 12/16

7:35 pm-8:03 pm

2 stops25h 28m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Compare providers for flights from Great Falls to Ontario

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 Ontario in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Great Falls-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Great Falls-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Great Falls-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Great Falls-Ontario flights, Cheapflights users trust eDreams the most. eDreams 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-Ontario 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 Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Great Falls with our price prediction graph.
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 Great Falls to Ontario

What is the cheapest month to book a flight from Great Falls to Ontario?

Currently, June is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $178). Flying from Great Falls to Ontario in July is currently the most expensive (average of $324). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated December 4, 2025.
Read reviews from past customers who have flown Delta from Great Falls to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,011 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Food

7.3

Comfort

7.9

Entertainment

7.9

Overall

7.9

Boarding

8.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Great Falls to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Great Falls to Ontario?

    Departing from Great Falls to Ontario will take you 4h 03m. The distance from Great Falls to Ontario is about 982 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Great Falls to Ontario round-trip?

    Currently priced at $162, Delta will fly you from Great Falls to Ontario and back. In addition to Delta, many other airlines offer competitively priced options for your trip.

  • Can I find deals for flights from Great Falls to Ontario that include hotel bookings?

    Yes. In addition to deals on Great Falls to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Great Falls to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Great Falls to Ontario.

  • Can I find deals for business class flights from Great Falls to Ontario?

    Yes. Cheapflights offers flight deals from Great Falls to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Great Falls to Ontario?

    Currently, June is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $178). Flying from Great Falls to Ontario in July is currently the most expensive (average of $324). 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.

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Top airline flying from Great Falls to Ontario

Discover the top airline that operate flights from Great Falls to Ontario. 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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$203Average$400FlexibilityNo cancel feeOn-timeN/A

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