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.

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

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

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 42m on average, while flying from Kalispell to Los Angeles is 3h 06m 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 September 2026, there are 4 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.

$134 Cheap Flights from Montana to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Montana to Los Angeles

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

6:16 pm - 11:57 pmFCA Kalispell Glacier Park-ONT Ontario

6h 41m1 stop Salt Lake City

6:00 am - 11:38 amONT Ontario-FCA Kalispell Glacier Park

4h 38m1 stop Salt Lake City

$327Delta

Sun, Dec 6 - Wed, Dec 9

6:16 pm - 11:57 pmFCA Kalispell Glacier Park-ONT Ontario

6h 41m1 stop Salt Lake City

6:00 am - 11:38 amONT Ontario-FCA Kalispell Glacier Park

4h 38m1 stop Salt Lake City

$327Delta

Thu, Dec 3 - Sat, Dec 5

7:37 pm - 10:38 amFCA Kalispell Glacier Park-ONT Ontario

16h 01m1 stop Seattle/Tacoma Intl

7:00 am - 6:57 pmONT Ontario-FCA Kalispell Glacier Park

10h 57m1 stop Seattle/Tacoma Intl

$336Alaska Airlines

Wed, Jan 27 - Wed, Feb 10

4:08 pm - 10:41 pmGTF Great Falls-ONT Ontario

7h 33m1 stop Seattle/Tacoma Intl

7:00 am - 3:28 pmONT Ontario-GTF Great Falls

7h 28m1 stop Seattle/Tacoma Intl

$338Alaska Airlines

Fri, Jan 22 - Sat, Jan 23

2:36 pm - 8:51 pmFCA Kalispell Glacier Park-ONT Ontario

7h 15m1 stop Denver Intl

5:00 am - 1:34 pmONT Ontario-FCA Kalispell Glacier Park

7h 34m1 stop Denver Intl

$348United Airlines

Thu, Nov 5 - Mon, Nov 9

2:33 pm - 9:11 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 38m1 stop Denver Intl

6:00 am - 11:29 amONT Ontario-BZN Bozeman Gallatin Field

4h 29m1 stop San Francisco

$355United Airlines

Wed, Dec 16 - Wed, Jan 6

11:25 am - 6:00 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 35m2 stops Denver Intl San Jose

5:15 pm - 10:30 pmONT Ontario-BZN Bozeman Gallatin Field

4h 15m1 stop Las Vegas Harry Reid Intl

$360Southwest

Sat, Oct 24 - Mon, Oct 26

3:30 pm - 9:40 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 10m1 stop Denver Intl

12:00 pm - 10:00 pmONT Ontario-BZN Bozeman Gallatin Field

9h 00m2 stops Phoenix Sky Harbor Intl Denver Intl

$360Southwest

Wed, Dec 16 - Wed, Jan 6

5:16 pm - 7:07 amBIL Billings Logan Intl-ONT Ontario

14h 51m1 stop Las Vegas Harry Reid Intl

6:27 pm - 4:26 pmONT Ontario-BIL Billings Logan Intl

20h 59m1 stop Las Vegas Harry Reid Intl

$382Multiple Airlines

Fri, Jan 8 - Sun, Jan 10

1:15 pm - 10:53 pmBZN Bozeman Gallatin Field-ONT Ontario

10h 38m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

7:34 pm - 12:25 pmONT Ontario-BZN Bozeman Gallatin Field

15h 51m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$847American Airlines

Fri, Oct 9 - Sun, Oct 11

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Enter your travel dates to find the best prices.

4:22 pm - 10:51 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 29m1 stop San Francisco

9:25 am - 3:14 pmONT Ontario-BZN Bozeman Gallatin Field

4h 49m1 stop San Francisco

$369United Airlines

Fri, Oct 2 - Sun, Oct 4

9:23 pm - 10:17 amFCA Kalispell Glacier Park-ONT Ontario

13h 54m1 stop Seattle/Tacoma Intl

6:02 am - 12:23 pmONT Ontario-FCA Kalispell Glacier Park

5h 21m1 stop Seattle/Tacoma Intl

$449Alaska Airlines

Fri, Oct 2 - Sun, Oct 4

5:30 am - 9:02 amFCA Kalispell Glacier Park-ONT Ontario

4h 32m1 stop Salt Lake City

6:00 am - 11:47 amONT Ontario-FCA Kalispell Glacier Park

4h 47m1 stop Salt Lake City

$449Delta

Fri, Oct 2 - Sun, Oct 4

4:22 pm - 10:51 pmBZN Bozeman Gallatin Field-ONT Ontario

7h 29m1 stop San Francisco

9:25 am - 3:14 pmONT Ontario-BZN Bozeman Gallatin Field

4h 49m1 stop San Francisco

$469United Airlines

Thu, Oct 1 - Sun, Oct 4

5:30 am - 9:02 amFCA Kalispell Glacier Park-ONT Ontario

4h 32m1 stop Salt Lake City

5:03 pm - 10:57 pmONT Ontario-FCA Kalispell Glacier Park

4h 54m1 stop Salt Lake City

$509Delta

Thu, Oct 1 - Fri, Oct 9

1:02 pm - 8:09 pmFCA Kalispell Glacier Park-ONT Ontario

8h 07m1 stop Dallas/Fort Worth

6:00 am - 2:33 pmONT Ontario-FCA Kalispell Glacier Park

7h 33m1 stop Dallas/Fort Worth

$509American Airlines

Fri, Oct 2 - Sun, Oct 4

1:02 pm - 10:37 pmFCA Kalispell Glacier Park-ONT Ontario

10h 35m1 stop Dallas/Fort Worth

6:00 am - 2:33 pmONT Ontario-FCA Kalispell Glacier Park

7h 33m1 stop Dallas/Fort Worth

$513American Airlines

Fri, Oct 2 - Sun, Oct 4

8:21 pm - 11:16 amFCA Kalispell Glacier Park-ONT Ontario

15h 55m1 stop Seattle/Tacoma Intl

6:02 am - 12:23 pmONT Ontario-FCA Kalispell Glacier Park

5h 21m1 stop Seattle/Tacoma Intl

$520Alaska Airlines

Thu, Oct 1 - Sun, Oct 4

6:15 pm - 10:15 pmBZN Bozeman Gallatin Field-ONT Ontario

5h 00m1 stop Las Vegas Harry Reid Intl

5:10 pm - 1:45 amONT Ontario-BZN Bozeman Gallatin Field

7h 35m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

$539Southwest

Fri, Oct 2 - Sun, Oct 4

6:15 pm - 11:50 pmBZN Bozeman Gallatin Field-ONT Ontario

6h 35m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

5:10 pm - 1:45 amONT Ontario-BZN Bozeman Gallatin Field

7h 35m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl

$544Southwest

Fri, Oct 2 - Sun, Oct 4

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Delta flights from Montana to Ontario

Our best Delta deals on Montana to Ontario flight tickets

Delta

Dec 2

FCA6:16 pmKalispell Glacier Park

6h 41m

1 stop

ONT11:57 pmOntario

Dec 6

ONT6:00 amOntario

4h 38m

1 stop

FCA11:38 amKalispell Glacier Park

$327

Delta

Nov 14

HLN7:00 amHelena

6h 17m

1 stop

ONT12:17 pmOntario

Nov 17

ONT5:04 pmOntario

4h 22m

1 stop

HLN10:26 pmHelena

$349

Delta

Nov 13

HLN1:07 pmHelena

10h 53m

2 stops

ONT11:00 pmOntario

Nov 17

ONT5:04 pmOntario

4h 22m

1 stop

HLN10:26 pmHelena

$354

Alaska Airlines flights from Montana to Ontario

Our best Alaska Airlines deals on Montana to Ontario flight tickets

Alaska Airlines

Jan 27

FCA7:37 pmKalispell Glacier Park

16h 01m

1 stop

ONT10:38 amOntario

Feb 10

ONT7:00 amOntario

10h 57m

1 stop

FCA6:57 pmKalispell Glacier Park

$336

Alaska Airlines

Jan 4

GTF5:12 pmGreat Falls

7h 44m

1 stop

ONT11:56 pmOntario

Jan 9

ONT7:00 amOntario

7h 28m

1 stop

GTF3:28 pmGreat Falls

$338

Alaska Airlines

Jan 4

GTF5:12 pmGreat Falls

7h 44m

1 stop

ONT11:56 pmOntario

Jan 10

ONT7:00 amOntario

7h 28m

1 stop

GTF3:28 pmGreat Falls

$352

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

KalispellOntario

FCA Kalispell Glacier Park - ONT Ontario

FCAONT

Kalispell Glacier Park

Sun 12/6

6:16 pm-11:57 pm

1 stop6h 41m

Ontario

Wed 12/9

6:00 am-11:38 am

1 stop4h 38m

$327

KalispellOntario

FCA Kalispell Glacier Park - ONT Ontario

FCAONT

Kalispell Glacier Park

Thu 12/3

6:16 pm-11:57 pm

1 stop6h 41m

Ontario

Sat 12/5

6:00 am-11:38 am

1 stop4h 38m

$327

KalispellOntario

FCA Kalispell Glacier Park - ONT Ontario

FCAONT

Kalispell Glacier Park

Wed 1/27

7:37 pm-10:38 am

1 stop16h 01m

Ontario

Wed 2/10

7:00 am-6:57 pm

1 stop10h 57m

$336

Great FallsOntario

GTF Great Falls - ONT Ontario

GTFONT

Great Falls

Fri 1/22

4:08 pm-10:41 pm

1 stop7h 33m

Ontario

Sat 1/23

7:00 am-3:28 pm

1 stop7h 28m

$338

KalispellOntario

FCA Kalispell Glacier Park - ONT Ontario

FCAONT

Kalispell Glacier Park

Thu 11/5

2:36 pm-8:51 pm

1 stop7h 15m

Ontario

Mon 11/9

5:00 am-1:34 pm

1 stop7h 34m

$348

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Wed 12/16

2:33 pm-9:11 pm

1 stop7h 38m

Ontario

Wed 1/6

6:00 am-11:29 am

1 stop4h 29m

$355

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Sat 10/24

11:25 am-6:00 pm

2 stops7h 35m

Ontario

Mon 10/26

5:15 pm-10:30 pm

1 stop4h 15m

$360

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Wed 12/16

3:30 pm-9:40 pm

1 stop7h 10m

Ontario

Wed 1/6

12:00 pm-10:00 pm

2 stops9h 00m

$360

BillingsOntario

BIL Billings Logan Intl - ONT Ontario

BILONT

Billings Logan Intl

Fri 1/8

5:16 pm-7:07 am

1 stop14h 51m

Ontario

Sun 1/10

6:27 pm-4:26 pm

1 stop20h 59m

$382

BozemanOntario

BZN Bozeman Gallatin Field - ONT Ontario

BZNONT

Bozeman Gallatin Field

Fri 10/9

1:15 pm-10:53 pm

2 stops10h 38m

Ontario

Sun 10/11

7:34 pm-12:25 pm

2 stops15h 51m

$847

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 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

Best Price Found	$134
Fastest flight time	4h 15m
Direct flights	None

The best one-way flight to Ontario from Montana in the past 72 hours is $134. The best round-trip flight deal from Montana to Ontario found on momondo in the last 72 hours is $327.

The fastest flight from Montana to Ontario takes 4h 15m

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

Search flight deals

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 September 2026, there are 4 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 8,604 reviews	Search Delta flights
United Airlines	PriceFrom $164	Free Cancellation	Rating 7.4 10,246 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $169	Free Cancellation	Rating 7.9 12,985 reviews	Search Alaska Airlines flights
Southwest	PriceFrom $223	Free Cancellation	Rating 8.0 4,202 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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Cheap flights from Montana to Los Angeles from $134

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 10/18. 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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Delta flights from Montana to Ontario

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Cheap Montana to Ontario flight deals and tips

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Frequently asked questions about flying from Montana to Ontario

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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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Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

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