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Cheap flights from Ontario to Montana from $99

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Montana departing on 12/10. 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 Ontario to Montana

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
2:59 pm - 9:31 amONT-MSO
17h 32m1 stop
Multiple Airlines Logo
10:26 pm - 9:17 pmMSO-ONT
23h 51m1 stop
$178Multiple Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
Multiple Airlines Logo
6:15 am - 9:31 amONT-MSO
26h 16m1 stop
Multiple Airlines Logo
10:26 pm - 9:17 pmMSO-ONT
23h 51m1 stop
$191Multiple Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
Alaska Airlines Logo
4:03 pm - 11:56 pmONT-BZN
6h 53m1 stop
Alaska Airlines Logo
7:20 am - 3:08 pmBZN-ONT
8h 48m1 stop
$210Alaska Airlines
Find Deal
Wed, Jan 14 - Tue, Jan 20
Hawaiian Airlines Logo
6:00 am - 12:14 pmONT-FCA
5h 14m1 stop
Hawaiian Airlines Logo
7:46 pm - 11:56 pmFCA-ONT
5h 10m1 stop
$210Hawaiian Airlines
Find Deal
Mon, Feb 2 - Fri, Feb 6
United Airlines Logo
5:05 am - 1:37 pmONT-BZN
7h 32m1 stop
United Airlines Logo
4:25 pm - 9:07 pmBZN-ONT
5h 42m1 stop
$211United Airlines
Find Deal
Thu, Dec 18 - Sun, Dec 21
Delta Logo
5:05 pm - 11:59 pmONT-BZN
5h 54m1 stop
Delta Logo
5:45 am - 9:01 amBZN-ONT
4h 16m1 stop
$217Delta
Find Deal
Thu, May 14 - Thu, May 21
Delta Logo
6:00 am - 10:50 amONT-BZN
3h 50m1 stop
Delta Logo
6:16 pm - 11:54 pmBZN-ONT
6h 38m1 stop
$218Delta
Find Deal
Thu, Dec 18 - Sun, Dec 21
Alaska Airlines Logo
7:00 am - 1:14 pmONT-FCA
5h 14m1 stop
Alaska Airlines Logo
7:46 pm - 11:56 pmFCA-ONT
5h 10m1 stop
$222Alaska Airlines
Find Deal
Thu, Feb 5 - Mon, Feb 9
Hawaiian Airlines Logo
4:03 pm - 11:55 pmONT-MSO
6h 52m1 stop
Hawaiian Airlines Logo
1:03 pm - 5:03 pmMSO-ONT
5h 00m1 stop
$260Hawaiian Airlines
Find Deal
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
1:24 pm - 9:26 pmONT-HLN
7h 02m1 stop
United Airlines Logo
2:25 pm - 8:50 pmHLN-ONT
7h 25m1 stop
$379United Airlines
Find Deal
Sat, Feb 7 - Thu, Feb 12

Delta flights from Ontario to Montana

Our best Delta deals on Ontario to Montana flight tickets
Delta
May 14
ONT5:05 pmOntario
5h 54m
1 stop
BZN11:59 pmBozeman Gallatin Field
May 22
BZN5:45 amBozeman Gallatin Field
4h 16m
1 stop
ONT9:01 amOntario
$217
Find similar
Delta
Dec 18
ONT6:00 amOntario
3h 50m
1 stop
BZN10:50 amBozeman Gallatin Field
Dec 21
BZN6:16 pmBozeman Gallatin Field
6h 38m
1 stop
ONT11:54 pmOntario
$218
Find similar
Delta
Jan 16
ONT3:30 pmOntario
27h 55m
1 stop
BZN8:25 pmBozeman Gallatin Field
Jan 20
BZN3:00 pmBozeman Gallatin Field
8h 51m
1 stop
ONT10:51 pmOntario
$221
Find similar

Southwest flights from Ontario to Montana

Our best Southwest deals on Ontario to Montana flight tickets
Southwest
Jan 31
ONT10:15 amOntario
9h 15m
2 stops
BZN8:30 pmBozeman Gallatin Field
Feb 4
BZN11:15 amBozeman Gallatin Field
6h 40m
2 stops
ONT4:55 pmOntario
$299
Find similar
Southwest
Dec 10
ONT6:50 amOntario
4h 05m
1 stop
BZN11:55 amBozeman Gallatin Field
Dec 13
BZN5:00 amBozeman Gallatin Field
7h 30m
2 stops
ONT11:30 amOntario
$310
Find similar
Southwest
Feb 20
ONT5:30 amOntario
8h 25m
2 stops
BZN2:55 pmBozeman Gallatin Field
Feb 24
BZN11:15 amBozeman Gallatin Field
10h 05m
2 stops
ONT8:20 pmOntario
$319
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to Montana 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 November 26, 2025.
Use the filters below to find and compare flights from Ontario to Montana that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 12/11

2:59 pm-9:31 am

1 stop17h 32m

Missoula Johnson-Bell Field

Sun 12/14

10:26 pm-9:17 pm

1 stop23h 51m

$178

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 12/11

6:15 am-9:31 am

1 stop26h 16m

Missoula Johnson-Bell Field

Sun 12/14

10:26 pm-9:17 pm

1 stop23h 51m

$191

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 1/14

4:03 pm-11:56 pm

1 stop6h 53m

Bozeman Gallatin Field

Tue 1/20

7:20 am-3:08 pm

1 stop8h 48m

$210

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Mon 2/2

6:00 am-12:14 pm

1 stop5h 14m

Kalispell Glacier Park

Fri 2/6

7:46 pm-11:56 pm

1 stop5h 10m

$210

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 12/18

5:05 am-1:37 pm

1 stop7h 32m

Bozeman Gallatin Field

Sun 12/21

4:25 pm-9:07 pm

1 stop5h 42m

$211

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 5/14

5:05 pm-11:59 pm

1 stop5h 54m

Bozeman Gallatin Field

Thu 5/21

5:45 am-9:01 am

1 stop4h 16m

$217

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 12/18

6:00 am-10:50 am

1 stop3h 50m

Bozeman Gallatin Field

Sun 12/21

6:16 pm-11:54 pm

1 stop6h 38m

$218

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Thu 2/5

7:00 am-1:14 pm

1 stop5h 14m

Kalispell Glacier Park

Mon 2/9

7:46 pm-11:56 pm

1 stop5h 10m

$222

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 1/8

4:03 pm-11:55 pm

1 stop6h 52m

Missoula Johnson-Bell Field

Mon 1/12

1:03 pm-5:03 pm

1 stop5h 00m

$260

OntarioHelena

ONT - HLN

ONTHLN

Ontario

Sat 2/7

1:24 pm-9:26 pm

1 stop7h 02m

Helena

Thu 2/12

2:25 pm-8:50 pm

1 stop7h 25m

$379

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Montana from

How to get the cheapest flight ticket from Ontario to Montana

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 Montana?

The cheapest month to fly to Montana from Ontario is in November. Flight prices, which tend to average around $249, are often lower during this time because this is during the off-season. The month of October is another great option to travel to Montana, with average flight prices from Ontario averaging around $275.

What is the cheapest day to depart on your flight to Montana?

Our data shows that Tuesday is the least expensive day to fly to Montana. Tickets to fly out on this day can be as low as $359. The most expensive day to fly to Montana is Sunday, with ticket prices averaging around $485.

What is the cheapest time of day to depart on your flight to Montana?

The cheapest time of day to fly to Montana is in the evening when flights can be purchased for as low as $206. At noon is when there is more demand to fly to Montana, so prices are often more expensive at around $488 per ticket.

Cheap Ontario to Montana flight deals and tips

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

Fastest flight time

3h 50m

Direct flights

None
The fastest flight from Ontario to Montana takes 3h 50m
There are no direct flights from Ontario to Montana. There are no popular flight routes from Ontario to Montana.
Search flight deals

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

    Prices for flights from Ontario Airport to Montana were last updated today.

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

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

    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 Ontario Airport to Montana.

  • What documentation or ID do you need to fly to Montana?

    The travel and health documents required for your trip to Montana can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Montana. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Ontario to Montana

Compare and see reviews for airlines that fly from Ontario to Montana with momondo
Airline
Rating
Free Cancellation
Price
Alaska AirlinesPriceFrom $178Free CancellationRating
8.0
11,357 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $189Free CancellationRating
7.4
9,046 reviews
Search United Airlines flights
DeltaPriceFrom $198Free CancellationRating
7.9
7,998 reviews
Search Delta flights
SouthwestPriceFrom $211Free CancellationRating
8.0
4,253 reviews
Search Southwest flights

Why use momondo?

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

Finding the right flight to Montana from Ontario is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Montana quick and easy, saving you time and money.

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

All flight searches from Ontario to Montana on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Ontario to Montana 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 Ontario to Montana right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Montana flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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