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$127+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ONT
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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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 May 1, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$285
(Delta)

One-way from

$127
(United Airlines)

Popular in

December

Cheapest in

February

Average price

$318
Provider with most accurate pricing for Great Falls-Ontario flight deals.
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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 ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/30. 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.
Sun 5/2511:45 amGTF - ONT
1 stop5h 32mDelta
Tue 6/34:57 pmONT - GTF
1 stop4h 34mDelta
Deal found 4/30$285
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/255:09 pmGTF - ONT
1 stop6h 37mHawaiian Airlines
Tue 6/36:00 amONT - GTF
1 stop9h 29mHawaiian Airlines
Deal found 4/30$304
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Fri 5/236:25 amGTF - ONT
1 stop7h 06mUnited Airlines
Tue 5/275:10 amONT - GTF
1 stop7h 17mUnited Airlines
Deal found 4/30$314
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 8/74:55 pmGTF - ONT
1 stop8h 18mAlaska Airlines
Mon 8/117:30 amONT - GTF
2 stops7h 43mAlaska Airlines
Deal found 4/30$542

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 May 1, 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

Sun 5/25

11:45 am-4:17 pm

1 stop5h 32m

Ontario

Tue 6/3

4:57 pm-10:31 pm

1 stop4h 34m

$285

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sun 5/25

5:09 pm-10:46 pm

1 stop6h 37m

Ontario

Tue 6/3

6:00 am-4:29 pm

1 stop9h 29m

$304

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 5/23

6:25 am-12:31 pm

1 stop7h 06m

Ontario

Tue 5/27

5:10 am-1:27 pm

1 stop7h 17m

$314

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 8/7

4:55 pm-12:13 am

1 stop8h 18m

Ontario

Mon 8/11

7:30 am-4:13 pm

2 stops7h 43m

$542

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 5/30

2:26 pm-9:04 pm

1 stop7h 38m

$127

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/31

11:45 am-10:35 pm

2 stops11h 50m

$167

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 10/10

4:00 pm-10:37 pm

1 stop7h 37m

$180

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 10/10

4:00 pm-4:53 pm

2 stops25h 53m

$253

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 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, August is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $246). Flying from Great Falls to Ontario in March is currently the most expensive (average of $328). 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.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 May 1, 2025.
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Entertainment

7.1

Food

7.1

Crew

8.5

Comfort

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What are the cheapest airlines flying from Great Falls to Ontario round-trip?

    Currently priced at $285, 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. Search Cheapflights for deals from Hawaiian Airlines and United Airlines - these airlines can fly you to your destination from $304 and $314, respectively.

  • What are the cheapest airlines to fly from Great Falls to Ontario one-way?

    One-way options have recently been found by users for as low as $127 on United Airlines. Other airlines that offer cheap prices include Delta from $167 and Hawaiian Airlines from $180 one-way.

  • 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, August is the cheapest month in which you can book a flight from Great Falls to Ontario (average of $246). Flying from Great Falls to Ontario in March is currently the most expensive (average of $328). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$246Average$474FlexibilityNo cancel feeOn-timeN/A

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