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

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

What airlines fly to Ontario?

United Airlines, Delta and Alaska Airlines are the top three most popular airlines that fly to Ontario from Montana according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 6 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Ontario?

Average flight duration from Montana to Ontario depends on which airport you fly into and out of. Flying from Bozeman to Los Angeles is 2h 39m on average, while flying from Missoula to Los Angeles is 2h 57m on average. Los Angeles is the most popular airport in 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?

As of August 2026, there are 3 operators available to choose from 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.

$109 Cheap Flights from Montana to Ontario in 2026

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1:00 pm - 4:30 pmBZN Bozeman Gallatin Field-ONT Ontario

4h 30m1 stop Salt Lake City

6:00 am - 12:05 pmONT Ontario-BZN Bozeman Gallatin Field

5h 05m1 stop Salt Lake City

$217Delta

Tue, Nov 10 - Thu, Nov 12

6:44 pm - 7:04 amBZN Bozeman Gallatin Field-ONT Ontario

13h 20m1 stop Las Vegas Harry Reid Intl

8:00 am - 8:52 pmONT Ontario-BZN Bozeman Gallatin Field

11h 52m1 stop Las Vegas Harry Reid Intl

$237Multiple Airlines

Thu, Sep 10 - Thu, Sep 17

8:46 pm - 9:09 amFCA Kalispell Glacier Park-ONT Ontario

13h 23m1 stop Las Vegas Harry Reid Intl

8:00 am - 7:56 pmONT Ontario-FCA Kalispell Glacier Park

10h 56m1 stop Las Vegas Harry Reid Intl

$259Multiple Airlines

Mon, Sep 21 - Mon, Sep 28

6:44 pm - 7:36 pmBZN Bozeman Gallatin Field-ONT Ontario

25h 52m2 stops Las Vegas Harry Reid Intl San Francisco

8:00 am - 8:52 pmONT Ontario-BZN Bozeman Gallatin Field

11h 52m1 stop Las Vegas Harry Reid Intl

$263Multiple Airlines

Thu, Sep 10 - Thu, Sep 17

4:32 pm - 8:53 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 21m1 stop Denver Intl

1:18 pm - 9:21 pmONT Ontario-BZN Bozeman Gallatin Field

7h 03m1 stop Denver Intl

$265United Airlines

Wed, Sep 9 - Sat, Sep 19

6:00 am - 9:02 amBZN Bozeman Gallatin Field-ONT Ontario

4h 02m1 stop Salt Lake City

6:00 am - 12:03 pmONT Ontario-BZN Bozeman Gallatin Field

5h 03m1 stop Salt Lake City

$279Delta

Wed, Sep 23 - Sun, Sep 27

2:21 pm - 7:03 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 42m1 stop Seattle/Tacoma Intl

3:14 pm - 10:59 pmONT Ontario-BZN Bozeman Gallatin Field

6h 45m1 stop Seattle/Tacoma Intl

$287Alaska Airlines

Thu, Sep 24 - Tue, Sep 29

4:13 pm - 8:15 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 02m1 stop San Francisco

5:00 am - 1:30 pmONT Ontario-BZN Bozeman Gallatin Field

7h 30m1 stop Denver Intl

$297United Airlines

Thu, Nov 12 - Sat, Nov 14

5:30 am - 8:55 amBZN Bozeman Gallatin Field-ONT Ontario

4h 25m1 stop Salt Lake City

6:00 am - 12:07 pmONT Ontario-BZN Bozeman Gallatin Field

5h 07m1 stop Salt Lake City

$304Delta

Fri, Oct 9 - Sun, Oct 11

3:55 pm - 8:15 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 20m1 stop Portland

7:25 am - 1:15 pmONT Ontario-BZN Bozeman Gallatin Field

4h 50m1 stop Portland

$314Alaska Airlines

Sat, Oct 24 - Tue, Oct 27

Cheap last minute flights

Enter your travel dates to find the best prices.

7:03 am - 2:10 pmBZN Bozeman Gallatin Field-ONT Ontario

8h 07m1 stop Seattle/Tacoma Intl

3:07 pm - 10:59 pmONT Ontario-BZN Bozeman Gallatin Field

6h 52m1 stop Seattle/Tacoma Intl

$414Alaska Airlines

Thu, Aug 20 - Mon, Aug 24

3:30 pm - 9:45 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 15m2 stops Denver Intl Las Vegas Harry Reid Intl

5:45 pm - 11:40 pmONT Ontario-BZN Bozeman Gallatin Field

4h 55m1 stop Las Vegas Harry Reid Intl

$419Southwest

Thu, Aug 20 - Mon, Aug 24

4:32 pm - 8:53 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 21m1 stop Denver Intl

5:00 am - 1:24 pmONT Ontario-BZN Bozeman Gallatin Field

7h 24m1 stop Denver Intl

$429United Airlines

Fri, Aug 21 - Sun, Aug 23

8:01 pm - 11:04 amFCA Kalispell Glacier Park-ONT Ontario

16h 03m1 stop Seattle/Tacoma Intl

7:59 pm - 12:28 pmONT Ontario-FCA Kalispell Glacier Park

15h 29m1 stop Seattle/Tacoma Intl

$429Alaska Airlines

Thu, Aug 20 - Mon, Aug 24

6:08 pm - 11:24 pmFCA Kalispell Glacier Park-ONT Ontario

6h 16m1 stop Seattle/Tacoma Intl

12:00 pm - 7:21 pmONT Ontario-FCA Kalispell Glacier Park

6h 21m1 stop Seattle/Tacoma Intl

$429Alaska Airlines

Thu, Aug 20 - Mon, Aug 24

3:30 pm - 9:45 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 15m2 stops Denver Intl Las Vegas Harry Reid Intl

5:40 am - 1:55 pmONT Ontario-BZN Bozeman Gallatin Field

7h 15m2 stops Las Vegas Harry Reid Intl Denver Intl

$470Southwest

Thu, Aug 20 - Mon, Aug 24

5:20 am - 8:52 amBIL Billings Logan Intl-ONT Ontario

4h 32m1 stop Salt Lake City

5:05 pm - 10:25 pmONT Ontario-BIL Billings Logan Intl

4h 20m1 stop Salt Lake City

$471Delta

Thu, Aug 20 - Mon, Aug 24

5:20 am - 8:52 amBIL Billings Logan Intl-ONT Ontario

4h 32m1 stop Salt Lake City

5:05 pm - 10:25 pmONT Ontario-BIL Billings Logan Intl

4h 20m1 stop Salt Lake City

$486Delta

Wed, Aug 19 - Mon, Aug 24

5:07 am - 12:12 pmBIL Billings Logan Intl-ONT Ontario

8h 05m2 stops Denver Intl San Francisco

5:00 am - 1:21 pmONT Ontario-BIL Billings Logan Intl

7h 21m1 stop Denver Intl

$491United Airlines

Wed, Aug 19 - Mon, Aug 24

4:50 pm - 9:34 amFCA Kalispell Glacier Park-ONT Ontario

17h 44m2 stops Chicago O'Hare Intl Dallas/Fort Worth

4:07 pm - 12:42 pmONT Ontario-FCA Kalispell Glacier Park

19h 35m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$716American Airlines

Thu, Aug 20 - Mon, Aug 24

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United Airlines flights from Montana to Ontario

Our best United Airlines deals on Montana to Ontario flight tickets

United Airlines

Sep 9

BZN4:32 pmBozeman Gallatin Field

5h 21m

1 stop

ONT8:53 pmOntario

Sep 19

ONT1:18 pmOntario

7h 03m

1 stop

BZN9:21 pmBozeman Gallatin Field

$265

United Airlines

Oct 24

BZN4:22 pmBozeman Gallatin Field

7h 29m

1 stop

ONT10:51 pmOntario

Oct 27

ONT5:00 amOntario

7h 30m

1 stop

BZN1:30 pmBozeman Gallatin Field

$297

United Airlines

Nov 10

BZN4:13 pmBozeman Gallatin Field

5h 02m

1 stop

ONT8:15 pmOntario

Nov 12

ONT9:25 amOntario

4h 51m

1 stop

BZN3:16 pmBozeman Gallatin Field

$317

Delta flights from Montana to Ontario

Our best Delta deals on Montana to Ontario flight tickets

Delta

Nov 10

BZN1:00 pmBozeman Gallatin Field

4h 30m

1 stop

ONT4:30 pmOntario

Nov 12

ONT6:00 amOntario

5h 05m

1 stop

BZN12:05 pmBozeman Gallatin Field

$217

Delta

Oct 9

BZN5:30 amBozeman Gallatin Field

4h 25m

1 stop

ONT8:55 amOntario

Oct 11

ONT6:00 amOntario

5h 07m

1 stop

BZN12:07 pmBozeman Gallatin Field

$304

Delta

Sep 18

FCA5:30 amKalispell Glacier Park

4h 32m

1 stop

ONT9:02 amOntario

Sep 27

ONT6:00 amOntario

4h 47m

1 stop

FCA11:47 amKalispell Glacier Park

$307

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Tue 11/10

1:00 pm-4:30 pm

1 stop4h 30m

Ontario

Thu 11/12

6:00 am-12:05 pm

1 stop5h 05m

$217

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Thu 9/10

6:44 pm-7:04 am

1 stop13h 20m

Ontario

Thu 9/17

8:00 am-8:52 pm

1 stop11h 52m

$237

KalispellOntario

FCA Kalispell Glacier Park - ONT Ontario

FCAONT

Kalispell Glacier Park

Mon 9/21

8:46 pm-9:09 am

1 stop13h 23m

Ontario

Mon 9/28

8:00 am-7:56 pm

1 stop10h 56m

$259

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Thu 9/10

6:44 pm-7:36 pm

2 stops25h 52m

Ontario

Thu 9/17

8:00 am-8:52 pm

1 stop11h 52m

$263

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Wed 9/9

4:32 pm-8:53 pm

1 stop5h 21m

Ontario

Sat 9/19

1:18 pm-9:21 pm

1 stop7h 03m

$265

Quickest round-trip

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Wed 9/23

6:00 am-9:02 am

1 stop4h 02m

Ontario

Sun 9/27

6:00 am-12:03 pm

1 stop5h 03m

$279

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Thu 9/24

2:21 pm-7:03 pm

1 stop5h 42m

Ontario

Tue 9/29

3:14 pm-10:59 pm

1 stop6h 45m

$287

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Thu 11/12

4:13 pm-8:15 pm

1 stop5h 02m

Ontario

Sat 11/14

5:00 am-1:30 pm

1 stop7h 30m

$297

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Fri 10/9

5:30 am-8:55 am

1 stop4h 25m

Ontario

Sun 10/11

6:00 am-12:07 pm

1 stop5h 07m

$304

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Sat 10/24

3:55 pm-8:15 pm

1 stop5h 20m

Ontario

Tue 10/27

7:25 am-1:15 pm

1 stop4h 50m

$314

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Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Ontario?

In general, June 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 $260. If you aren’t able to travel during the month of June, then book flights to Ontario from Montana during January instead. Flights to Ontario in January, while not as cheap as those in June, still average around $273.

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?
As of August 2026, there are 3 operators available to choose from 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
Delta	PriceFrom $108	Free Cancellation	Rating 7.8 8,504 reviews	Search Delta flights
Alaska Airlines	PriceFrom $163	Free Cancellation	Rating 7.9 12,810 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $164	Free Cancellation	Rating 7.4 10,106 reviews	Search United 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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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 9/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Compare and see reviews for airlines that fly from Montana to Ontario with momondo

Why use momondo?

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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