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Cheap flights from Great Falls to Los Angeles from $116

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to Los Angeles departing on 4/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Great Falls to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:20 pm - 10:43 pm
GTF
-
ONT
5h 23m
1 stop
Delta Logo
5:05 pm - 10:29 pm
ONT
-
GTF
4h 24m
1 stop
$232Delta
Sat, May 2 - Tue, May 5
Delta Logo
6:20 pm - 10:43 pm
GTF
-
ONT
5h 23m
1 stop
Delta Logo
5:05 pm - 10:29 pm
ONT
-
GTF
4h 24m
1 stop
$242Delta
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 5:52 pm
GTF
-
ONT
12h 37m
2 stops
United Airlines Logo
1:40 pm - 9:18 pm
ONT
-
GTF
6h 38m
1 stop
$282United Airlines
Sat, May 2 - Tue, May 5
Delta Logo
6:20 pm - 10:43 pm
GTF
-
ONT
5h 23m
1 stop
Delta Logo
5:05 pm - 10:29 pm
ONT
-
GTF
4h 24m
1 stop
$302Delta
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 5:52 pm
GTF
-
ONT
12h 37m
2 stops
United Airlines Logo
1:40 pm - 9:18 pm
ONT
-
GTF
6h 38m
1 stop
$342United Airlines
Sat, May 2 - Tue, May 5
Delta Logo
6:20 pm - 11:44 pm
GTF
-
ONT
6h 24m
1 stop
Delta Logo
6:00 am - 12:27 pm
ONT
-
GTF
5h 27m
1 stop
$350Delta
Wed, Apr 22 - Mon, Apr 27
Delta Logo
1:09 pm - 10:37 pm
GTF
-
ONT
10h 28m
2 stops
Delta Logo
6:00 am - 12:27 pm
ONT
-
GTF
5h 27m
1 stop
$356Delta
Wed, Apr 22 - Mon, Apr 27
Delta Logo
1:09 pm - 10:37 pm
GTF
-
ONT
10h 28m
2 stops
Delta Logo
11:53 am - 10:29 pm
ONT
-
GTF
9h 36m
2 stops
$361Delta
Wed, Apr 22 - Mon, Apr 27
United Airlines Logo
6:15 am - 12:32 pm
GTF
-
ONT
7h 17m
1 stop
United Airlines Logo
5:00 am - 1:33 pm
ONT
-
GTF
7h 33m
1 stop
$364United Airlines
Tue, Jun 2 - Sat, Jun 6
United Airlines Logo
6:15 am - 5:52 pm
GTF
-
ONT
12h 37m
2 stops
United Airlines Logo
6:00 am - 9:18 pm
ONT
-
GTF
14h 18m
2 stops
$401United Airlines
Sat, May 2 - Tue, May 5

United Airlines flights from Great Falls to Ontario

Our best United Airlines deals on Great Falls to Ontario flight tickets
United Airlines
May 2
GTF6:15 amGreat Falls
12h 37m
2 stops
ONT5:52 pmOntario
May 5
ONT1:40 pmOntario
6h 38m
1 stop
GTF9:18 pmGreat Falls
$282
United Airlines
May 2
GTF6:15 amGreat Falls
12h 37m
2 stops
ONT5:52 pmOntario
May 5
ONT1:40 pmOntario
6h 38m
1 stop
GTF9:18 pmGreat Falls
$342
United Airlines
May 2
GTF6:15 amGreat Falls
12h 37m
2 stops
ONT5:52 pmOntario
May 5
ONT6:00 amOntario
14h 18m
2 stops
GTF9:18 pmGreat Falls
$401

Delta flights from Great Falls to Ontario

Our best Delta deals on Great Falls to Ontario flight tickets
Delta
May 2
GTF6:20 pmGreat Falls
5h 23m
1 stop
ONT10:43 pmOntario
May 5
ONT5:05 pmOntario
4h 24m
1 stop
GTF10:29 pmGreat Falls
$242
Delta
May 2
GTF6:20 pmGreat Falls
5h 23m
1 stop
ONT10:43 pmOntario
May 5
ONT5:05 pmOntario
4h 24m
1 stop
GTF10:29 pmGreat Falls
$292
Delta
May 2
GTF6:20 pmGreat Falls
5h 23m
1 stop
ONT10:43 pmOntario
May 5
ONT5:05 pmOntario
4h 24m
1 stop
GTF10:29 pmGreat Falls
$302

momondo 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, momondo users made 832,500 searches. Data last updated February 11, 2026.
Use the filters below to find and compare flights from Great Falls to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:20 pm-10:43 pm

1 stop5h 23m

Ontario

Tue 5/5

5:05 pm-10:29 pm

1 stop4h 24m

$232

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:20 pm-10:43 pm

1 stop5h 23m

Ontario

Tue 5/5

5:05 pm-10:29 pm

1 stop4h 24m

$242

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:15 am-5:52 pm

2 stops12h 37m

Ontario

Tue 5/5

1:40 pm-9:18 pm

1 stop6h 38m

$282

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:20 pm-10:43 pm

1 stop5h 23m

Ontario

Tue 5/5

5:05 pm-10:29 pm

1 stop4h 24m

$302

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:15 am-5:52 pm

2 stops12h 37m

Ontario

Tue 5/5

1:40 pm-9:18 pm

1 stop6h 38m

$342

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Wed 4/22

6:20 pm-11:44 pm

1 stop6h 24m

Ontario

Mon 4/27

6:00 am-12:27 pm

1 stop5h 27m

$350

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Wed 4/22

1:09 pm-10:37 pm

2 stops10h 28m

Ontario

Mon 4/27

6:00 am-12:27 pm

1 stop5h 27m

$356

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Wed 4/22

1:09 pm-10:37 pm

2 stops10h 28m

Ontario

Mon 4/27

11:53 am-10:29 pm

2 stops9h 36m

$361

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Tue 6/2

6:15 am-12:32 pm

1 stop7h 17m

Ontario

Sat 6/6

5:00 am-1:33 pm

1 stop7h 33m

$364

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Sat 5/2

6:15 am-5:52 pm

2 stops12h 37m

Ontario

Tue 5/5

6:00 am-9:18 pm

2 stops14h 18m

$401

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Los Angeles from

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

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

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

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

4h 04m

Direct flights

None
The fastest flight from Great Falls to Ontario takes 4h 04m
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 4h 04m, 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?

  • 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?

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
DeltaPriceFrom $203Free CancellationRating
7.9
8,179 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.

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