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Cheap flights from Montana to Los Angeles from $131

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 8/24. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montana to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:15 am - 12:12 pm
FCA
-
ONT
5h 57m
1 stop
United Airlines Logo
1:56 pm - 7:51 pm
ONT
-
FCA
4h 55m
1 stop
$277United Airlines
Wed, Aug 19 - Tue, Aug 25
Delta Logo
6:00 am - 8:52 am
BZN
-
ONT
3h 52m
1 stop
Delta Logo
5:05 pm - 10:03 pm
ONT
-
BZN
3h 58m
1 stop
$311Delta
Wed, Aug 19 - Tue, Sep 1
Delta Logo
6:33 pm - 11:47 pm
BIL
-
ONT
6h 14m
1 stop
Delta Logo
5:15 pm - 10:34 pm
ONT
-
BIL
4h 19m
1 stop
$311Delta
Thu, Sep 17 - Thu, Sep 24
Delta Logo
5:15 am - 8:47 am
BZN
-
ONT
4h 32m
1 stop
Delta Logo
5:10 pm - 12:23 am
ONT
-
BZN
6h 13m
1 stop
$312Delta
Thu, Jul 23 - Sun, Jul 26
Alaska Airlines Logo
6:03 am - 11:14 am
BZN
-
ONT
6h 11m
1 stop
Alaska Airlines Logo
2:05 pm - 11:19 pm
ONT
-
BZN
8h 14m
1 stop
$322Alaska Airlines
Fri, Jul 31 - Fri, Aug 14
Alaska Airlines Logo
6:03 am - 1:09 pm
BZN
-
ONT
8h 06m
1 stop
Alaska Airlines Logo
3:07 pm - 10:59 pm
ONT
-
BZN
6h 52m
1 stop
$325Alaska Airlines
Tue, Aug 18 - Fri, Aug 28
Multiple Airlines Logo
10:24 am - 8:03 am
GTF
-
ONT
22h 39m
1 stop
Multiple Airlines Logo
3:40 pm - 9:29 am
ONT
-
GTF
16h 49m
1 stop
$357Multiple Airlines
Fri, Jul 31 - Sun, Aug 2
Southwest Logo
6:55 am - 1:10 pm
BZN
-
ONT
7h 15m
2 stops
Southwest Logo
1:50 pm - 10:25 pm
ONT
-
BZN
7h 35m
1 stop
$360Southwest
Tue, Aug 4 - Wed, Aug 5
Southwest Logo
6:10 am - 11:20 am
BZN
-
ONT
6h 10m
2 stops
Southwest Logo
4:35 pm - 12:15 am
ONT
-
BZN
6h 40m
1 stop
$364Southwest
Fri, Jul 31 - Sun, Aug 2
Multiple Airlines Logo
10:24 am - 11:07 am
GTF
-
ONT
25h 43m
2 stops
Multiple Airlines Logo
3:40 pm - 9:29 am
ONT
-
GTF
16h 49m
1 stop
$398Multiple Airlines
Fri, Jul 31 - Sun, Aug 2

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United Airlines flights from Montana to Ontario

Our best United Airlines deals on Montana to Ontario flight tickets
United Airlines
Aug 19
FCA7:15 amKalispell Glacier Park
5h 57m
1 stop
ONT12:12 pmOntario
Aug 25
ONT1:56 pmOntario
4h 55m
1 stop
FCA7:51 pmKalispell Glacier Park
$277
United Airlines
Aug 27
BIL7:00 amBillings Logan Intl
6h 50m
1 stop
ONT12:50 pmOntario
Aug 29
ONT11:00 amOntario
10h 07m
2 stops
BIL10:07 pmBillings Logan Intl
$364
United Airlines
Aug 27
BIL5:07 amBillings Logan Intl
8h 05m
2 stops
ONT12:12 pmOntario
Aug 29
ONT11:00 amOntario
9h 00m
2 stops
BIL9:00 pmBillings Logan Intl
$369

Southwest flights from Montana to Ontario

Our best Southwest deals on Montana to Ontario flight tickets
Southwest
Aug 4
BZN6:55 amBozeman Gallatin Field
7h 15m
2 stops
ONT1:10 pmOntario
Aug 5
ONT1:50 pmOntario
7h 35m
1 stop
BZN10:25 pmBozeman Gallatin Field
$360
Southwest
Jul 31
BZN6:10 amBozeman Gallatin Field
6h 10m
2 stops
ONT11:20 amOntario
Aug 2
ONT4:35 pmOntario
6h 40m
1 stop
BZN12:15 amBozeman Gallatin Field
$364
Southwest
Aug 11
BZN6:55 amBozeman Gallatin Field
6h 45m
1 stop
ONT12:40 pmOntario
Aug 20
ONT5:45 pmOntario
4h 55m
1 stop
BZN11:40 pmBozeman Gallatin Field
$369

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 July 2, 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

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Wed 8/19

7:15 am-12:12 pm

1 stop5h 57m

Ontario

Tue 8/25

1:56 pm-7:51 pm

1 stop4h 55m

$277
Quickest round-trip

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Wed 8/19

6:00 am-8:52 am

1 stop3h 52m

Ontario

Tue 9/1

5:05 pm-10:03 pm

1 stop3h 58m

$311

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Thu 9/17

6:33 pm-11:47 pm

1 stop6h 14m

Ontario

Thu 9/24

5:15 pm-10:34 pm

1 stop4h 19m

$311

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 7/23

5:15 am-8:47 am

1 stop4h 32m

Ontario

Sun 7/26

5:10 pm-12:23 am

1 stop6h 13m

$312

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 7/31

6:03 am-11:14 am

1 stop6h 11m

Ontario

Fri 8/14

2:05 pm-11:19 pm

1 stop8h 14m

$322

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 8/18

6:03 am-1:09 pm

1 stop8h 06m

Ontario

Fri 8/28

3:07 pm-10:59 pm

1 stop6h 52m

$325

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 7/31

10:24 am-8:03 am

1 stop22h 39m

Ontario

Sun 8/2

3:40 pm-9:29 am

1 stop16h 49m

$357

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Tue 8/4

6:55 am-1:10 pm

2 stops7h 15m

Ontario

Wed 8/5

1:50 pm-10:25 pm

1 stop7h 35m

$360

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 7/31

6:10 am-11:20 am

2 stops6h 10m

Ontario

Sun 8/2

4:35 pm-12:15 am

1 stop6h 40m

$364

Great FallsOntario

GTF - ONT

GTFONT

Great Falls

Fri 7/31

10:24 am-11:07 am

2 stops25h 43m

Ontario

Sun 8/2

3:40 pm-9:29 am

1 stop16h 49m

$398

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, April 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 $108. If you aren’t able to travel during the month of April, then book flights to Ontario from Montana during November instead. Flights to Ontario in November, while not as cheap as those in April, still average around $120.

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

3h 52m

Direct flights

None
The fastest flight from Montana to Ontario takes 3h 52m
There are no direct flights from Montana to Ontario. There are no popular flight routes from Montana to Ontario.
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Frequently asked questions about flying from Montana to Ontario

  • 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
7.8
8,452 reviews
Search Delta flights
Alaska AirlinesPriceFrom $163Free CancellationRating
7.9
12,603 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $164Free CancellationRating
7.4
9,924 reviews
Search United Airlines flights
SouthwestPriceFrom $223Free CancellationRating
7.9
4,250 reviews
Search Southwest 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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