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$115+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ONT
mars 3 — mars 101
mar. 3/3
mar. 3/10
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 février 1, 2026.

This Delta deal was found by Cheapflights users on 2/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 5/26:20 pm
GTF
-
ONT
1 stop5h 23m
Delta
mar. 5/55:05 pm
ONT
-
GTF
1 stop4h 24m
Delta
Deal found 2/1$232
This United Airlines deal was found by Cheapflights users on 1/31. 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.
mar. 4/72:30 pm
GTF
-
ONT
1 stop7h 06m
United Airlines
mer. 4/155:10 am
ONT
-
GTF
1 stop7h 21m
United Airlines
Deal found 1/31$268
This United Airlines deal was found by Cheapflights users on 1/30. 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.
sam. 5/26:15 am
GTF
-
ONT
2 stops12h 37m
United Airlines
mar. 5/51:40 pm
ONT
-
GTF
1 stop6h 38m
United Airlines
Deal found 1/30$274
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
ven. 2/274:57 pm
GTF
-
ONT
1 stop7h 35m
Alaska Airlines
lun. 3/26:08 pm
ONT
-
GTF
2 stops21h 09m
Alaska Airlines
Deal found 1/30$316
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
mar. 3/34:57 pm
GTF
-
ONT
1 stop6h 47m
Alaska Airlines
jeu. 3/512:02 pm
ONT
-
GTF
1 stop27h 15m
Alaska Airlines
Deal found 1/30$368
This Delta deal was found by Cheapflights users on 1/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 2/116:15 pm
GTF
-
ONT
1 stop6h 43m
Delta
mer. 2/185:00 pm
ONT
-
GTF
1 stop4h 29m
Delta
Deal found 1/30$375
This Alaska Airlines deal was found by Cheapflights users on 1/30. 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.
lun. 2/234:57 pm
GTF
-
ONT
1 stop7h 35m
Alaska Airlines
mar. 2/246:14 am
ONT
-
GTF
1 stop9h 03m
Alaska Airlines
Deal found 1/30$376

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 février 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$232
(Delta)

One-way from

$115
(Alaska Airlines)

Popular in

July

Cheapest in

February

Average price

$251
Provider with most accurate pricing for Great Falls-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Great Falls-Ontario flights.
Search Deals
From Great Falls to Ontario
Search Deals
One-way flight from Great Falls to Ontario
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($37 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 février 1, 2026.
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

sam. 5/2

6:20 pm-10:43 pm

1 stop5h 23m

Ontario

mar. 5/5

5:05 pm-10:29 pm

1 stop4h 24m

$232

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

mar. 4/7

2:30 pm-8:36 pm

1 stop7h 06m

Ontario

mer. 4/15

5:10 am-1:31 pm

1 stop7h 21m

$268

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

sam. 5/2

6:15 am-5:52 pm

2 stops12h 37m

Ontario

mar. 5/5

1:40 pm-9:18 pm

1 stop6h 38m

$274

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

ven. 2/27

4:57 pm-11:32 pm

1 stop7h 35m

Ontario

lun. 3/2

6:08 pm-4:17 pm

2 stops21h 09m

$316

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

mar. 4/7

5:06 pm-11:59 pm

1 stop7h 53m

Ontario

mer. 4/15

7:00 am-4:26 pm

2 stops8h 26m

$332

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

sam. 2/28

6:28 pm-11:32 pm

1 stop6h 04m

$115

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

dim. 3/1

4:57 pm-11:32 pm

1 stop7h 35m

$134

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

sam. 2/28

6:25 am-5:41 pm

2 stops12h 16m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

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 February.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Great Falls-Ontario flight deals on Cheapflights vs. FlightHub >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 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-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, February is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $152). Flying from Great Falls to Ontario in July is currently the most expensive (average of $318). 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 février 1, 2026.
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
8,128 reviews

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

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
8,128 reviews
Delta
7.9
Good
8,128 reviews

Entertainment

7.8

Boarding

8.1

Comfort

7.9

Crew

8.5

Food

7.2

Overall

7.9

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 5h 23m. 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, February is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $152). Flying from Great Falls to Ontario in July is currently the most expensive (average of $318). 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.

See more FAQs

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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 février 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$162Average$333FlexibilityNo cancel feeOn-timeN/A

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