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

United Airlines 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 81% 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 September 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.

$263 Cheap Flights from Great Falls to Ontario (GTF-ONT) in 2025

1 adult

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Find the cheapest flights from Great Falls to Los Angeles (GTF-ONT)

Round-trip

One-way

Cheap round-trip flights

7:00 am - 12:51 pmGTF-ONT

6h 51m1 stop

1:15 pm - 9:11 pmONT-GTF

6h 56m1 stop

$268United Airlines

Find Deal

Sat, Oct 4 - Tue, Oct 7

4:55 pm - 8:56 pmGTF-ONT

5h 01m1 stop

6:00 am - 9:31 pmONT-GTF

14h 31m1 stop

$270

Find Deal

Mon, Sep 22 - Fri, Sep 26

6:11 pm - 10:41 pmGTF-ONT

5h 30m1 stop

7:35 am - 5:29 pmONT-GTF

8h 54m2 stops

$274Delta

Find Deal

Sat, Oct 4 - Tue, Oct 7

6:11 pm - 11:42 pmGTF-ONT

6h 31m1 stop

9:50 am - 5:29 pmONT-GTF

6h 39m1 stop

$295Delta

Find Deal

Fri, Oct 3 - Wed, Oct 8

1:08 pm - 10:41 pmGTF-ONT

10h 33m2 stops

6:00 am - 12:28 pmONT-GTF

5h 28m1 stop

$301Delta

Find Deal

Sat, Oct 25 - Thu, Oct 30

1:08 pm - 10:41 pmGTF-ONT

10h 33m2 stops

7:35 am - 5:29 pmONT-GTF

8h 54m2 stops

$306Delta

Find Deal

Sat, Oct 25 - Thu, Oct 30

4:55 pm - 7:54 pmGTF-ONT

27h 59m2 stops

6:00 am - 9:31 pmONT-GTF

14h 31m1 stop

$348

Find Deal

Mon, Sep 22 - Fri, Sep 26

4:00 pm - 10:37 pmGTF-ONT

7h 37m1 stop

6:00 am - 3:20 pmONT-GTF

8h 20m1 stop

$380Alaska Airlines

Find Deal

Sun, Jan 25 - Mon, Feb 2

2:31 pm - 8:24 pmGTF-ONT

6h 53m1 stop

5:05 am - 1:26 pmONT-GTF

7h 21m1 stop

$392United Airlines

Find Deal

Fri, Oct 3 - Sun, Oct 5

4:29 pm - 9:26 amGTF-ONT

17h 57m2 stops

5:49 pm - 3:49 pmONT-GTF

21h 00m2 stops

$758Alaska Airlines

Find Deal

Mon, Sep 22 - Fri, Sep 26

United Airlines flights from Great Falls to Ontario

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

United Airlines

Oct 4

GTF7:00 amGreat Falls

6h 51m

1 stop

ONT12:51 pmOntario

Oct 7

ONT1:15 pmOntario

6h 56m

1 stop

GTF9:11 pmGreat Falls

$268

Find similar

United Airlines

Oct 3

GTF2:31 pmGreat Falls

6h 53m

1 stop

ONT8:24 pmOntario

Oct 5

ONT5:05 amOntario

7h 21m

1 stop

GTF1:26 pmGreat Falls

$392

Find similar

United Airlines

Oct 3

GTF2:31 pmGreat Falls

22h 42m

2 stops

ONT12:13 pmOntario

Oct 8

ONT5:05 amOntario

7h 21m

1 stop

GTF1:26 pmGreat Falls

$417

Find similar

Delta flights from Great Falls to Ontario

Our best Delta deals on Great Falls to Ontario flight tickets

Delta

Oct 4

GTF6:11 pmGreat Falls

5h 30m

1 stop

ONT10:41 pmOntario

Oct 7

ONT7:35 amOntario

8h 54m

2 stops

GTF5:29 pmGreat Falls

$274

Find similar

Delta

Oct 3

GTF6:11 pmGreat Falls

6h 31m

1 stop

ONT11:42 pmOntario

Oct 8

ONT9:50 amOntario

6h 39m

1 stop

GTF5:29 pmGreat Falls

$295

Find similar

Delta

Oct 25

GTF1:08 pmGreat Falls

10h 33m

2 stops

ONT10:41 pmOntario

Oct 30

ONT6:00 amOntario

5h 28m

1 stop

GTF12:28 pmGreat Falls

$301

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 10/4

7:00 am-12:51 pm

1 stop6h 51m

Ontario

Tue 10/7

1:15 pm-9:11 pm

1 stop6h 56m

$268

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 9/22

4:55 pm-8:56 pm

1 stop5h 01m

Ontario

Fri 9/26

6:00 am-9:31 pm

1 stop14h 31m

$270

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 10/4

6:11 pm-10:41 pm

1 stop5h 30m

Ontario

Tue 10/7

7:35 am-5:29 pm

2 stops8h 54m

$274

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 10/3

6:11 pm-11:42 pm

1 stop6h 31m

Ontario

Wed 10/8

9:50 am-5:29 pm

1 stop6h 39m

$295

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 10/25

1:08 pm-10:41 pm

2 stops10h 33m

Ontario

Thu 10/30

6:00 am-12:28 pm

1 stop5h 28m

$301

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 10/25

1:08 pm-10:41 pm

2 stops10h 33m

Ontario

Thu 10/30

7:35 am-5:29 pm

2 stops8h 54m

$306

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 9/22

4:55 pm-7:54 pm

2 stops27h 59m

Ontario

Fri 9/26

6:00 am-9:31 pm

1 stop14h 31m

$348

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sun 1/25

4:00 pm-10:37 pm

1 stop7h 37m

Ontario

Mon 2/2

6:00 am-3:20 pm

1 stop8h 20m

$380

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 10/3

2:31 pm-8:24 pm

1 stop6h 53m

Ontario

Sun 10/5

5:05 am-1:26 pm

1 stop7h 21m

$392

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Mon 9/22

4:29 pm-9:26 am

2 stops17h 57m

Ontario

Fri 9/26

5:49 pm-3:49 pm

2 stops21h 00m

$758

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 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.

Search flight deals

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 01m, 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 September 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 $246	Free Cancellation	Rating 7.9 7,966 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.