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Cheap flights from Montana to Los Angeles from $109

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Montana to Los Angeles departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Montana to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:54 pm - 10:44 am
MSO
-
ONT
14h 50m
1 stop
Multiple Airlines Logo
11:44 am - 8:04 pm
ONT
-
MSO
7h 20m
1 stop
$241Multiple Airlines
Mon, Apr 20 - Fri, Apr 24
Alaska Airlines Logo
8:00 am - 2:32 pm
BZN
-
ONT
7h 32m
1 stop
Alaska Airlines Logo
10:39 am - 7:19 pm
ONT
-
BZN
7h 40m
1 stop
$262Alaska Airlines
Tue, Apr 28 - Wed, Apr 29
Delta Logo
6:34 pm - 11:44 pm
BZN
-
ONT
6h 10m
1 stop
Delta Logo
6:00 am - 11:04 am
ONT
-
BZN
4h 04m
1 stop
$271Delta
Fri, Apr 17 - Sun, Apr 19
Delta Logo
3:15 pm - 10:37 pm
BZN
-
ONT
8h 22m
1 stop
Delta Logo
6:00 am - 11:04 am
ONT
-
BZN
4h 04m
1 stop
$273Delta
Thu, Apr 16 - Sun, Apr 19
Delta Logo
5:13 am - 8:53 am
FCA
-
ONT
4h 40m
1 stop
Delta Logo
6:00 am - 11:25 am
ONT
-
FCA
4h 25m
1 stop
$277Delta
Fri, May 22 - Tue, May 26
Multiple Airlines Logo
8:54 pm - 11:55 pm
MSO
-
ONT
28h 01m
2 stops
Multiple Airlines Logo
11:44 am - 8:04 pm
ONT
-
MSO
7h 20m
1 stop
$283Multiple Airlines
Mon, Apr 20 - Fri, Apr 24
American Airlines Logo
3:50 pm - 11:59 pm
FCA
-
ONT
9h 09m
1 stop
American Airlines Logo
7:12 pm - 11:35 am
ONT
-
FCA
15h 23m
2 stops
$293American Airlines
Fri, May 22 - Tue, May 26
United Airlines Logo
6:34 am - 12:38 pm
BZN
-
ONT
7h 04m
1 stop
United Airlines Logo
1:34 pm - 9:32 pm
ONT
-
BZN
6h 58m
1 stop
$297United Airlines
Sat, Apr 18 - Sat, Apr 25
United Airlines Logo
6:15 am - 12:38 pm
MSO
-
ONT
7h 23m
1 stop
United Airlines Logo
5:10 am - 1:32 pm
ONT
-
MSO
7h 22m
1 stop
$326United Airlines
Wed, Apr 22 - Sat, Apr 25
American Airlines Logo
3:50 pm - 11:59 pm
FCA
-
ONT
9h 09m
1 stop
American Airlines Logo
7:12 pm - 11:35 am
ONT
-
FCA
15h 23m
2 stops
$346American Airlines
Fri, May 22 - Tue, May 26

Delta flights from Montana to Ontario

Our best Delta deals on Montana to Ontario flight tickets
Delta
Apr 17
BZN6:34 pmBozeman Gallatin Field
6h 10m
1 stop
ONT11:44 pmOntario
Apr 19
ONT6:00 amOntario
4h 04m
1 stop
BZN11:04 amBozeman Gallatin Field
$271
Delta
Apr 16
BZN3:15 pmBozeman Gallatin Field
8h 22m
1 stop
ONT10:37 pmOntario
Apr 19
ONT6:00 amOntario
4h 04m
1 stop
BZN11:04 amBozeman Gallatin Field
$273
Delta
May 22
FCA5:13 amKalispell Glacier Park
4h 40m
1 stop
ONT8:53 amOntario
May 26
ONT6:00 amOntario
4h 25m
1 stop
FCA11:25 amKalispell Glacier Park
$277

Alaska Airlines flights from Montana to Ontario

Our best Alaska Airlines deals on Montana to Ontario flight tickets
Alaska Airlines
Apr 28
BZN8:00 amBozeman Gallatin Field
7h 32m
1 stop
ONT2:32 pmOntario
Apr 29
ONT10:39 amOntario
7h 40m
1 stop
BZN7:19 pmBozeman Gallatin Field
$262
Alaska Airlines
May 27
BZN8:00 amBozeman Gallatin Field
8h 09m
1 stop
ONT3:09 pmOntario
Jun 2
ONT4:03 pmOntario
5h 39m
1 stop
BZN10:42 pmBozeman Gallatin Field
$291
Alaska Airlines
Apr 28
BZN8:00 amBozeman Gallatin Field
7h 32m
1 stop
ONT2:32 pmOntario
Apr 29
ONT10:39 amOntario
7h 40m
1 stop
BZN7:19 pmBozeman Gallatin Field
$295

momondo Fare Finder

 
Customize your flight search to find flights from Montana 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 March 26, 2026.
Use the filters below to find and compare flights from Montana to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 4/20

8:54 pm-10:44 am

1 stop14h 50m

Ontario

Fri 4/24

11:44 am-8:04 pm

1 stop7h 20m

$241

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 4/28

8:00 am-2:32 pm

1 stop7h 32m

Ontario

Wed 4/29

10:39 am-7:19 pm

1 stop7h 40m

$262

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 4/17

6:34 pm-11:44 pm

1 stop6h 10m

Ontario

Sun 4/19

6:00 am-11:04 am

1 stop4h 04m

$271

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 4/16

3:15 pm-10:37 pm

1 stop8h 22m

Ontario

Sun 4/19

6:00 am-11:04 am

1 stop4h 04m

$273
Quickest round-trip

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 5/22

5:13 am-8:53 am

1 stop4h 40m

Ontario

Tue 5/26

6:00 am-11:25 am

1 stop4h 25m

$277

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 4/20

8:54 pm-11:55 pm

2 stops28h 01m

Ontario

Fri 4/24

11:44 am-8:04 pm

1 stop7h 20m

$283

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 5/22

3:50 pm-11:59 pm

1 stop9h 09m

Ontario

Tue 5/26

7:12 pm-11:35 am

2 stops15h 23m

$293

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 4/18

6:34 am-12:38 pm

1 stop7h 04m

Ontario

Sat 4/25

1:34 pm-9:32 pm

1 stop6h 58m

$297

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 4/22

6:15 am-12:38 pm

1 stop7h 23m

Ontario

Sat 4/25

5:10 am-1:32 pm

1 stop7h 22m

$326

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Fri 5/22

3:50 pm-11:59 pm

1 stop9h 09m

Ontario

Tue 5/26

7:12 pm-11:35 am

2 stops15h 23m

$346

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Montana 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 month to fly to Ontario?

In general, August is the cheapest month to fly from Montana to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $264. If you aren’t able to travel during the month of August, then book flights to Ontario from Montana during January instead. Flights to Ontario in January, while not as cheap as those in August, still average around $279.

Cheap Montana to Ontario flight deals and tips

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

Fastest flight time

4h 08m

Direct flights

None
The fastest flight from Montana to Ontario takes 4h 08m
There are no direct flights from Montana to Ontario. There are no popular flight routes from Montana to Ontario.
Search flight deals

  • When did momondo last update prices for flights from Montana to Ontario Airport?

    Prices for flights from Montana to Ontario Airport are updated daily.

  • How many operators does momondo search for flights from Montana to Ontario Airport?

  • How old do you have to be to fly from Montana to Ontario Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Montana to Ontario Airport.

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

    The travel and health documents you'll need for your trip to Ontario Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ontario Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Montana to Ontario

Compare and see reviews for airlines that fly from Montana to Ontario with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $108Free CancellationRating
7.9
8,336 reviews
Search Delta flights
United AirlinesPriceFrom $164Free CancellationRating
7.4
9,488 reviews
Search United Airlines flights
SouthwestPriceFrom $227Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $276Free CancellationRating
7.9
12,119 reviews
Search Alaska Airlines flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Montana to Ontario. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Ontario from Montana which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Montana to Ontario?

Once all potential Montana to Ontario flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Ontario from Montana are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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