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$138+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — ONT
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 junio 12, 2025.

Round-trip from

$335
(Alaska Airlines)

One-way from

$138
(Hawaiian Airlines)

Popular in

December

Cheapest in

February

Average price

$426
From Great Falls to Ontario
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One-way flight from Great Falls to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
jue. 10/24:29 pmGTF - ONT
1 stop8h 30mAlaska Airlines
mié. 10/156:00 amONT - GTF
1 stop10h 35mAlaska Airlines
Deal found 6/11$335
This Delta deal was found by Cheapflights users on 6/10. 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.
jue. 7/175:45 amGTF - ONT
1 stop4h 02mDelta
dom. 7/206:00 amONT - GTF
1 stop4h 03mDelta
Deal found 6/10$360
This United Airlines deal was found by Cheapflights users on 6/9. 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.
jue. 7/176:25 amGTF - ONT
1 stop7h 07mUnited Airlines
dom. 7/205:05 amONT - GTF
1 stop7h 31mUnited Airlines
Deal found 6/9$430

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 junio 12, 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

jue. 10/2

4:29 pm-11:59 pm

1 stop8h 30m

Ontario

mié. 10/15

6:00 am-5:35 pm

1 stop10h 35m

$335

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

jue. 7/17

5:45 am-8:47 am

1 stop4h 02m

Ontario

dom. 7/20

6:00 am-11:03 am

1 stop4h 03m

$360

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

jue. 7/17

6:25 am-12:32 pm

1 stop7h 07m

Ontario

dom. 7/20

5:05 am-1:36 pm

1 stop7h 31m

$430

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

dom. 8/31

4:29 pm-11:59 pm

1 stop8h 30m

$138

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

vie. 7/11

6:19 pm-11:42 pm

1 stop6h 23m

$180

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

dom. 9/14

4:29 pm-9:26 am

2 stops17h 57m

$273

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

vie. 7/18

2:35 pm-12:14 pm

2 stops22h 39m

$397

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

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 junio 12, 2025.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

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
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

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
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

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
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Comfort

7.8

Entertainment

7.1

Crew

8.5

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 $335, Alaska Airlines will fly you from Great Falls to Ontario and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $360 and $430, 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 $138 on Hawaiian Airlines. Other airlines that offer cheap prices include Delta from $180 and Alaska Airlines from $273 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$246Average$474FlexibilityNo cancel feeOn-timeN/A

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