HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$141+ 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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ONT
Dec 2 — Dec 91
Tue 12/2
Tue 12/9
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Great Falls to Ontario 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.

Find 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 November 2, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/262:52 pmGTF - ONT
1 stop24h 34mMultiple Airlines
Sun 11/306:30 amONT - GTF
1 stop14h 05mMultiple Airlines
Deal found 11/1$453
This Alaska Airlines deal was found by Cheapflights users on 10/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/117:35 pmGTF - ONT
1 stop16h 44mAlaska Airlines
Fri 1/26:00 amONT - GTF
1 stop11h 41mAlaska Airlines
Deal found 10/31$618
This Delta deal was found by Cheapflights users on 10/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/111:12 pmGTF - ONT
2 stops10h 35mDelta
Fri 1/25:10 pmONT - GTF
1 stop4h 20mDelta
Deal found 10/31$646
This Alaska Airlines deal was found by Cheapflights users on 11/1. 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 11/267:42 pmGTF - ONT
2 stops15h 12mAlaska Airlines
Sun 11/307:00 amONT - GTF
2 stops35h 02mAlaska Airlines
Deal found 11/1$1,055

Cheap 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 November 2, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$271
(Kiwi.com)

One-way from

$141
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$283
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. 7% potential increase in price ($25 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 2, 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 1/19

5:18 pm-9:21 pm

1 stop5h 03m

Ontario

Sun 1/25

5:57 pm-4:28 pm

1 stop21h 31m

$271

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 1/19

8:00 pm-3:08 pm

1 stop20h 08m

Ontario

Sun 1/25

4:03 pm-7:20 pm

1 stop26h 17m

$332

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Wed 11/26

2:52 pm-2:26 pm

1 stop24h 34m

Ontario

Sun 11/30

6:30 am-9:35 pm

1 stop14h 05m

$453

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 12/11

7:35 pm-11:19 am

1 stop16h 44m

Ontario

Fri 1/2

6:00 am-6:41 pm

1 stop11h 41m

$618

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 1/19

5:18 pm-9:21 pm

1 stop5h 03m

$141

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 1/19

8:00 pm-7:16 pm

2 stops24h 16m

$187

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sun 11/9

6:10 pm-11:52 pm

1 stop6h 42m

$303

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

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 November.
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 November 2, 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
7,997 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

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
7,997 reviews
Delta
7.9
Good
7,997 reviews

Overall

7.9

Food

7.3

Crew

8.5

Entertainment

7.9

Boarding

8.2

Comfort

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 20h 08m. The distance from Great Falls to Ontario is about 982 mi.

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

    Currently priced at $203, 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Great Falls to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Bozeman to San Francisco flights
Bozeman to Las Vegas flights
Great Falls to Las Vegas flights
Bozeman to Los Angeles flights
Bozeman to San Diego flights
Billings to Las Vegas flights
Missoula to Las Vegas flights
Kalispell to Las Vegas flights
Kalispell to Los Angeles flights
Missoula to San Francisco flights
Helena to Las Vegas flights
Billings to Los Angeles flights
Billings to San Francisco flights
Kalispell to San Diego flights
Missoula to Los Angeles flights
Kalispell to Ontario flights
Bozeman to Palm Springs flights
Great Falls to San Diego flights
Missoula to Burbank flights
Kalispell to Sacramento flights
Bozeman to Ontario flights
Missoula to Ontario flights
Bozeman to Santa Ana flights
Missoula to Sacramento flights
Missoula to Santa Ana flights
Missoula to San Diego flights
Billings to Fresno flights
Billings to San Diego flights
Billings to Santa Ana flights
Billings to Sacramento flights
Bozeman to San Jose flights
Helena to Los Angeles flights
Bozeman to Burbank flights
Kalispell to Santa Ana flights
Great Falls to Los Angeles flights
Billings to Ontario flights
Kalispell to Palm Springs flights
Missoula to San Jose flights
Butte to Los Angeles flights
Great Falls to Burbank flights
Billings to Santa Barbara flights
Kalispell to Burbank flights
Billings to Bakersfield flights
Butte to Las Vegas flights
Bozeman to Reno flights
Kalispell to San Francisco flights
Billings to Oakland flights
Missoula to Fresno flights
Bozeman to Santa Barbara flights

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 November 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$203Average$400FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.