What is the cheapest airline that flies from Ontario to Montana?

Delta, Alaska Airlines, and United Airlines are the most popular carriers operating from Ontario to Montana

What airlines fly to Montana?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Montana from Ontario according to our data. United Airlines is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Montana. Keep in mind that there are 8 different airlines that fly to Montana on a routine basis, so you have a few additional options to choose from.

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?

As of June 2026, there are 4 operators available to choose from 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.

$92 Cheap Flights from Ontario to Montana in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Montana

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:40 pm - 9:34 am

ONT

MSO

16h 54m

1 stop

10:24 am - 8:03 am

MSO

ONT

22h 39m

1 stop

$263Multiple Airlines

Wed, Jul 22 - Sun, Jul 26

6:00 am - 11:17 am

ONT

BZN

4h 17m

1 stop

5:15 am - 8:47 am

BZN

ONT

4h 32m

1 stop

$271Delta

Thu, Jul 9 - Tue, Jul 21

5:10 pm - 10:03 pm

ONT

BZN

3h 53m

1 stop

5:15 am - 8:47 am

BZN

ONT

4h 32m

1 stop

$272Delta

Sat, Jul 11 - Mon, Jul 13

7:23 am - 1:23 pm

ONT

FCA

5h 00m

1 stop

7:45 pm - 11:42 pm

FCA

ONT

4h 57m

1 stop

$277Alaska Airlines

Sat, Oct 24 - Wed, Oct 28

3:40 pm - 4:01 pm

ONT

BIL

23h 21m

1 stop

8:53 pm - 3:09 pm

BIL

ONT

19h 16m

1 stop

$281Multiple Airlines

Thu, Sep 3 - Mon, Sep 7

7:00 pm - 12:15 am

ONT

BZN

4h 15m

1 stop

7:00 pm - 10:50 pm

BZN

ONT

4h 50m

1 stop

$291Southwest

Sun, Jul 19 - Tue, Jul 21

5:30 am - 10:35 am

ONT

BZN

4h 05m

1 stop

5:05 pm - 9:45 pm

BZN

ONT

5h 40m

1 stop

$305Southwest

Fri, Jul 31 - Fri, Aug 7

7:23 am - 1:22 pm

ONT

BZN

4h 59m

1 stop

8:00 am - 1:21 pm

BZN

ONT

6h 21m

1 stop

$311Alaska Airlines

Wed, Oct 21 - Sat, Oct 24

5:00 am - 1:21 pm

ONT

BIL

7h 21m

1 stop

5:00 am - 12:12 pm

BIL

ONT

8h 12m

2 stops

$366United Airlines

Fri, Sep 18 - Wed, Sep 23

5:00 am - 1:20 pm

ONT

WYS

7h 20m

1 stop

1:55 pm - 8:53 pm

WYS

ONT

7h 58m

1 stop

$418United Airlines

Mon, Aug 17 - Wed, Aug 26

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American Airlines flights from Ontario to Montana

Our best American Airlines deals on Ontario to Montana flight tickets

American Airlines

Aug 1

ONT11:59 pmOntario

9h 48m

1 stop

BZN10:47 amBozeman Gallatin Field

Aug 14

BZN6:26 amBozeman Gallatin Field

12h 49m

2 stops

ONT6:15 pmOntario

$404

American Airlines

Aug 7

ONT6:15 amOntario

5h 27m

1 stop

FCA12:42 pmKalispell Glacier Park

Aug 11

FCA3:45 pmKalispell Glacier Park

21h 18m

2 stops

ONT12:03 pmOntario

$452

American Airlines

Jun 21

ONT6:10 amOntario

5h 29m

1 stop

BZN12:39 pmBozeman Gallatin Field

Jun 23

BZN11:49 amBozeman Gallatin Field

11h 08m

2 stops

ONT9:57 pmOntario

$566

Delta flights from Ontario to Montana

Our best Delta deals on Ontario to Montana flight tickets

Delta

Jul 9

ONT6:00 amOntario

4h 17m

1 stop

BZN11:17 amBozeman Gallatin Field

Jul 21

BZN5:15 amBozeman Gallatin Field

4h 32m

1 stop

ONT8:47 amOntario

$271

Delta

Jul 11

ONT5:10 pmOntario

3h 53m

1 stop

BZN10:03 pmBozeman Gallatin Field

Jul 13

BZN5:15 amBozeman Gallatin Field

4h 32m

1 stop

ONT8:47 amOntario

$272

Delta

Jul 11

ONT5:10 pmOntario

3h 53m

1 stop

BZN10:03 pmBozeman Gallatin Field

Jul 13

BZN5:15 amBozeman Gallatin Field

4h 32m

1 stop

ONT8:47 amOntario

$295

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 7/22

3:40 pm-9:34 am

1 stop16h 54m

Missoula Johnson-Bell Field

Sun 7/26

10:24 am-8:03 am

1 stop22h 39m

$263

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Thu 7/9

6:00 am-11:17 am

1 stop4h 17m

Bozeman Gallatin Field

Tue 7/21

5:15 am-8:47 am

1 stop4h 32m

$271

Quickest round-trip

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Sat 7/11

5:10 pm-10:03 pm

1 stop3h 53m

Bozeman Gallatin Field

Mon 7/13

5:15 am-8:47 am

1 stop4h 32m

$272

OntarioKalispell

ONT - FCA

ONTFCA

Ontario

Sat 10/24

7:23 am-1:23 pm

1 stop5h 00m

Kalispell Glacier Park

Wed 10/28

7:45 pm-11:42 pm

1 stop4h 57m

$277

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Thu 9/3

3:40 pm-4:01 pm

1 stop23h 21m

Billings Logan Intl

Mon 9/7

8:53 pm-3:09 pm

1 stop19h 16m

$281

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Sun 7/19

7:00 pm-12:15 am

1 stop4h 15m

Bozeman Gallatin Field

Tue 7/21

7:00 pm-10:50 pm

1 stop4h 50m

$291

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Fri 7/31

5:30 am-10:35 am

1 stop4h 05m

Bozeman Gallatin Field

Fri 8/7

5:05 pm-9:45 pm

1 stop5h 40m

$305

OntarioBozeman

ONT - BZN

ONTBZN

Ontario

Wed 10/21

7:23 am-1:22 pm

1 stop4h 59m

Bozeman Gallatin Field

Sat 10/24

8:00 am-1:21 pm

1 stop6h 21m

$311

OntarioBillings

ONT - BIL

ONTBIL

Ontario

Fri 9/18

5:00 am-1:21 pm

1 stop7h 21m

Billings Logan Intl

Wed 9/23

5:00 am-12:12 pm

2 stops8h 12m

$366

OntarioWest Yellowstone

ONT - WYS

ONTWYS

Ontario

Mon 8/17

5:00 am-1:20 pm

1 stop7h 20m

West Yellowstone

Wed 8/26

1:55 pm-8:53 pm

1 stop7h 58m

$418

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

What is the cheapest month to fly to Montana?

The cheapest month to fly to Montana from Ontario is in July. Flight prices, which tend to average around $120, are often lower during this time because this is during the off-season. The month of June is another great option to travel to Montana, with average flight prices from Ontario averaging around $145.

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 47m
Direct flights	None

The fastest flight from Ontario to Montana takes 3h 47m

There are no direct flights from Ontario to Montana. There are no popular flight routes from Ontario to Montana.

Search flight deals

Frequently asked questions about flying from Ontario to Montana

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?
As of June 2026, there are 4 operators available to choose from 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 Airlines	PriceFrom $178	Free Cancellation	Rating 7.9 12,551 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,866 reviews	Search United Airlines flights
Delta	PriceFrom $198	Free Cancellation	Rating 7.8 8,422 reviews	Search Delta flights
Southwest	PriceFrom $230	Free Cancellation	Rating 7.9 4,243 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.