What airlines fly to Ontario?

Delta, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Ontario from Great Falls according to our data. Delta is the first choice among our users, with 82% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 3 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Great Falls Airport to Ontario Airport?

Prices for flights from Great Falls Airport to Ontario Airport are updated daily.

How many operators does momondo search for flights from Great Falls Airport to Ontario Airport?

The number of operators available for flights from Great Falls Airport to Ontario Airport is 1 as of December 2025.

How old do you have to be to fly from Great Falls Airport to Ontario Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Great Falls Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$254 Cheap Flights from Great Falls to Ontario in 2025/26

1 adult

0 bags

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5:59 pm - 8:36 pm

GTF

ONT

27h 37m1 stop

6:00 am - 5:19 pm

ONT

GTF

10h 19m1 stop

$254Alaska Airlines

Fri, Jan 16 - Sun, Jan 18

5:59 pm - 5:03 pm

GTF

ONT

24h 04m2 stops

6:00 am - 5:19 pm

ONT

GTF

10h 19m1 stop

$312Alaska Airlines

Fri, Jan 16 - Sun, Jan 18

5:59 pm - 11:56 pm

GTF

ONT

6h 57m1 stop

6:00 am - 5:19 pm

ONT

GTF

10h 19m1 stop

$326Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

5:59 pm - 11:56 pm

GTF

ONT

6h 57m1 stop

1:46 pm - 5:19 pm

ONT

GTF

26h 33m2 stops

$331Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

5:59 pm - 11:56 pm

GTF

ONT

6h 57m1 stop

4:03 pm - 5:19 pm

ONT

GTF

24h 16m1 stop

$336Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

5:59 pm - 11:56 pm

GTF

ONT

6h 57m1 stop

1:46 pm - 5:19 pm

ONT

GTF

26h 33m2 stops

$341Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

5:59 pm - 7:16 pm

GTF

ONT

26h 17m2 stops

1:46 pm - 5:19 pm

ONT

GTF

26h 33m2 stops

$344Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

5:59 pm - 5:03 pm

GTF

ONT

24h 04m2 stops

1:46 pm - 5:19 pm

ONT

GTF

26h 33m2 stops

$363Alaska Airlines

Mon, Feb 2 - Thu, Feb 5

Alaska Airlines flights from Great Falls to Ontario

Our best Alaska Airlines deals on Great Falls to Ontario flight tickets

Alaska Airlines

Jan 16

GTF5:59 pmGreat Falls

27h 37m

1 stop

ONT8:36 pmOntario

Jan 18

ONT6:00 amOntario

10h 19m

1 stop

GTF5:19 pmGreat Falls

$254

Find similar

Alaska Airlines

Jan 16

GTF5:59 pmGreat Falls

24h 04m

2 stops

ONT5:03 pmOntario

Jan 18

ONT6:00 amOntario

10h 19m

1 stop

GTF5:19 pmGreat Falls

$312

Find similar

Alaska Airlines

Feb 2

GTF5:59 pmGreat Falls

6h 57m

1 stop

ONT11:56 pmOntario

Feb 5

ONT6:00 amOntario

10h 19m

1 stop

GTF5:19 pmGreat Falls

$326

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 1/16

5:59 pm-8:36 pm

1 stop27h 37m

Ontario

Sun 1/18

6:00 am-5:19 pm

1 stop10h 19m

$254

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 1/16

5:59 pm-5:03 pm

2 stops24h 04m

Ontario

Sun 1/18

6:00 am-5:19 pm

1 stop10h 19m

$312

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-11:56 pm

1 stop6h 57m

Ontario

Thu 2/5

6:00 am-5:19 pm

1 stop10h 19m

$326

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-11:56 pm

1 stop6h 57m

Ontario

Thu 2/5

1:46 pm-5:19 pm

2 stops26h 33m

$331

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-11:56 pm

1 stop6h 57m

Ontario

Thu 2/5

4:03 pm-5:19 pm

1 stop24h 16m

$336

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-11:56 pm

1 stop6h 57m

Ontario

Thu 2/5

1:46 pm-5:19 pm

2 stops26h 33m

$341

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-7:16 pm

2 stops26h 17m

Ontario

Thu 2/5

1:46 pm-5:19 pm

2 stops26h 33m

$344

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 2/2

5:59 pm-5:03 pm

2 stops24h 04m

Ontario

Thu 2/5

1:46 pm-5:19 pm

2 stops26h 33m

$363

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Great Falls to Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Saturday when prices can be found for as low as $442. This is often the case because there is less demand to fly during this day of the week. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Great Falls to Ontario for around $460.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Great Falls to Ontario when you can find flight prices for as low as $440. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $527 on average. Flights to Ontario from Great Falls in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from Great Falls to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Great Falls to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Great Falls to Ontario (GTF to ONT) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to Ontario

Fastest flight time	5h 28m
Direct flights	None

The fastest flight from Great Falls to Ontario takes 5h 28m

There are no direct flights from Great Falls to Ontario. There are no popular flight routes from Great Falls to Ontario.

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How far is Great Falls to Ontario by plane?
A flight from Great Falls to Ontario will travel around 984.5 mi. Flights usually cover this in 5h 28m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Great Falls Airport to Ontario Airport?
Prices for flights from Great Falls Airport to Ontario Airport are updated daily.
How many operators does momondo search for flights from Great Falls Airport to Ontario Airport?
The number of operators available for flights from Great Falls Airport to Ontario Airport is 1 as of December 2025.
How old do you have to be to fly from Great Falls Airport to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Great Falls Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The necessary travel and health documents for your Ontario Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Great Falls to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Great Falls to Ontario is Delta (100% of total bookings).

Best airlines flying from Great Falls to Ontario

Compare and see reviews for airlines that fly from Great Falls to Ontario with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $203	Free Cancellation	Rating 7.9 8,007 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Great Falls to Ontario?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Ontario from Great Falls.

Can I find flights from Great Falls to Ontario with flexible booking policies on momondo?

Flights from Great Falls to Ontario with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Great Falls to Ontario?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Great Falls.

I’m not ready to book a flight from Great Falls to Ontario right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Ontario from Great Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.