What is the cheapest airline that flies from Great Falls to Ontario?

Delta and Alaska Airlines are the most popular carriers operating from Great Falls to Ontario

What airlines fly to Ontario?

Delta, Alaska Airlines and United 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 86% 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 October 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.

$160 Cheap Flights from Great Falls to Ontario in 2025/26

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Find the cheapest flights from Great Falls to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:00 pm - 10:37 pmGTF-ONT

7h 37m1 stop

6:00 am - 3:20 pmONT-GTF

8h 20m1 stop

$308Alaska Airlines

Find Deal

Mon, Mar 2 - Fri, Mar 6

7:35 pm - 11:19 amGTF-ONT

16h 44m1 stop

6:00 am - 6:55 pmONT-GTF

11h 55m1 stop

$342Alaska Airlines

Find Deal

Thu, Dec 4 - Mon, Dec 8

4:00 pm - 10:37 pmGTF-ONT

7h 37m1 stop

6:00 pm - 3:20 pmONT-GTF

20h 20m2 stops

$345Alaska Airlines

Find Deal

Mon, Mar 2 - Fri, Mar 6

7:35 pm - 8:03 pmGTF-ONT

25h 28m2 stops

6:00 am - 6:55 pmONT-GTF

11h 55m1 stop

$351Alaska Airlines

Find Deal

Thu, Dec 4 - Mon, Dec 8

6:50 pm - 11:32 pmGTF-ONT

5h 42m1 stop

11:59 am - 6:10 pmONT-GTF

5h 11m1 stop

$384Hawaiian Airlines

Find Deal

Fri, Nov 14 - Tue, Nov 18

6:50 pm - 11:32 pmGTF-ONT

5h 42m1 stop

11:59 am - 6:10 pmONT-GTF

5h 11m1 stop

$402Alaska Airlines

Find Deal

Thu, Nov 13 - Tue, Nov 18

6:10 pm - 11:52 pmGTF-ONT

6h 42m1 stop

5:49 pm - 5:30 pmONT-GTF

22h 41m2 stops

$410Delta

Find Deal

Fri, Nov 14 - Tue, Nov 18

6:10 pm - 9:49 pmGTF-ONT

4h 39m1 stop

4:49 pm - 10:30 pmONT-GTF

4h 41m1 stop

$412Delta

Find Deal

Sat, Nov 15 - Tue, Nov 18

6:10 pm - 11:52 pmGTF-ONT

6h 42m1 stop

6:45 am - 5:30 pmONT-GTF

9h 45m2 stops

$418Delta

Find Deal

Thu, Nov 13 - Wed, Nov 19

6:10 pm - 11:52 pmGTF-ONT

6h 42m1 stop

4:49 pm - 10:30 pmONT-GTF

4h 41m1 stop

$422Delta

Find Deal

Thu, Nov 13 - Mon, Nov 17

Alaska Airlines flights from Great Falls to Ontario

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

Alaska Airlines

Mar 2

GTF4:00 pmGreat Falls

7h 37m

1 stop

ONT10:37 pmOntario

Mar 6

ONT6:00 amOntario

8h 20m

1 stop

GTF3:20 pmGreat Falls

$308

Find similar

Alaska Airlines

Dec 4

GTF7:35 pmGreat Falls

16h 44m

1 stop

ONT11:19 amOntario

Dec 8

ONT6:00 amOntario

11h 55m

1 stop

GTF6:55 pmGreat Falls

$342

Find similar

Alaska Airlines

Mar 2

GTF4:00 pmGreat Falls

7h 37m

1 stop

ONT10:37 pmOntario

Mar 6

ONT6:00 pmOntario

20h 20m

2 stops

GTF3:20 pmGreat Falls

$345

Find similar

Delta flights from Great Falls to Ontario

Our best Delta deals on Great Falls to Ontario flight tickets

Delta

Nov 14

GTF6:10 pmGreat Falls

6h 42m

1 stop

ONT11:52 pmOntario

Nov 18

ONT5:49 pmOntario

22h 41m

2 stops

GTF5:30 pmGreat Falls

$410

Find similar

Delta

Nov 15

GTF6:10 pmGreat Falls

4h 39m

1 stop

ONT9:49 pmOntario

Nov 18

ONT4:49 pmOntario

4h 41m

1 stop

GTF10:30 pmGreat Falls

$412

Find similar

Delta

Nov 13

GTF6:10 pmGreat Falls

6h 42m

1 stop

ONT11:52 pmOntario

Nov 19

ONT6:45 amOntario

9h 45m

2 stops

GTF5:30 pmGreat Falls

$418

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 3/2

4:00 pm-10:37 pm

1 stop7h 37m

Ontario

Fri 3/6

6:00 am-3:20 pm

1 stop8h 20m

$308

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 12/4

7:35 pm-11:19 am

1 stop16h 44m

Ontario

Mon 12/8

6:00 am-6:55 pm

1 stop11h 55m

$342

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 3/2

4:00 pm-10:37 pm

1 stop7h 37m

Ontario

Fri 3/6

6:00 pm-3:20 pm

2 stops20h 20m

$345

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 12/4

7:35 pm-8:03 pm

2 stops25h 28m

Ontario

Mon 12/8

6:00 am-6:55 pm

1 stop11h 55m

$351

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 11/14

6:50 pm-11:32 pm

1 stop5h 42m

Ontario

Tue 11/18

11:59 am-6:10 pm

1 stop5h 11m

$384

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 11/13

6:50 pm-11:32 pm

1 stop5h 42m

Ontario

Tue 11/18

11:59 am-6:10 pm

1 stop5h 11m

$402

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 11/14

6:10 pm-11:52 pm

1 stop6h 42m

Ontario

Tue 11/18

5:49 pm-5:30 pm

2 stops22h 41m

$410

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 11/15

6:10 pm-9:49 pm

1 stop4h 39m

Ontario

Tue 11/18

4:49 pm-10:30 pm

1 stop4h 41m

$412

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 11/13

6:10 pm-11:52 pm

1 stop6h 42m

Ontario

Wed 11/19

6:45 am-5:30 pm

2 stops9h 45m

$418

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Thu 11/13

6:10 pm-11:52 pm

1 stop6h 42m

Ontario

Mon 11/17

4:49 pm-10:30 pm

1 stop4h 41m

$422

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted 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

Direct flights	None

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 4h 39m, 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 October 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 7,994 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.