What airlines fly to Ontario?

Delta, Alaska Airlines and United Airlines are the top three most popular airlines that fly to Ontario from Montana according to our data. Delta is the first choice among our users, with 43% 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 38m on average, while flying from Missoula to Los Angeles is 2h 52m on average. Los Angeles is the most popular airport in Ontario.

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

Hawaiian Airlines, Frontier, and Alaska Airlines are the most popular carriers operating 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 July 2025, 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.

$111 Cheap Flights from Montana to Ontario in 2025

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Find the cheapest flights from Montana to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

12:40 pm - 11:50 pmMSO-ONT

12h 10m1 stop

12:59 am - 11:54 amONT-MSO

9h 55m1 stop

$218Frontier

Find Deal

Fri, Aug 15 - Sun, Aug 17

7:25 am - 1:41 pmBZN-ONT

7h 16m1 stop

6:10 am - 3:02 pmONT-BZN

7h 52m1 stop

$235American Airlines

Find Deal

Thu, Aug 21 - Sun, Aug 24

7:23 pm - 11:59 pmBZN-ONT

5h 36m1 stop

6:00 am - 2:14 pmONT-BZN

7h 14m1 stop

$236Alaska Airlines

Find Deal

Thu, Aug 28 - Tue, Sep 2

5:30 pm - 10:49 pmBZN-ONT

6h 19m1 stop

6:00 am - 10:40 amONT-BZN

3h 40m1 stop

$237Delta

Find Deal

Sat, Oct 11 - Mon, Oct 13

6:35 pm - 12:03 amFCA-ONT

6h 28m1 stop

7:47 pm - 12:22 pmONT-FCA

15h 35m1 stop

$240Alaska Airlines

Find Deal

Thu, Oct 9 - Tue, Oct 14

3:43 pm - 9:26 amBIL-ONT

18h 43m1 stop

3:06 pm - 12:11 amONT-BIL

8h 05m1 stop

$240Alaska Airlines

Find Deal

Wed, Sep 24 - Mon, Sep 29

5:59 pm - 11:46 pmBIL-ONT

6h 47m1 stop

5:05 pm - 10:32 pmONT-BIL

4h 27m1 stop

$241Delta

Find Deal

Mon, Nov 24 - Tue, Dec 2

3:29 pm - 10:14 pmFCA-ONT

7h 45m1 stop

6:10 am - 2:39 pmONT-FCA

7h 29m1 stop

$241American Airlines

Find Deal

Thu, Aug 21 - Tue, Aug 26

7:18 pm - 12:03 amBIL-ONT

5h 45m1 stop

3:06 pm - 12:11 amONT-BIL

8h 05m1 stop

$284Hawaiian Airlines

Find Deal

Fri, Sep 26 - Mon, Sep 29

7:34 pm - 12:03 amBZN-ONT

5h 29m1 stop

7:10 am - 1:02 pmONT-BZN

4h 52m1 stop

$285Hawaiian Airlines

Find Deal

Fri, Oct 10 - Mon, Oct 13

American Airlines flights from Montana to Ontario

Our best American Airlines deals on Montana to Ontario flight tickets

American Airlines

Aug 21

BZN7:25 amBozeman Gallatin Field

7h 16m

1 stop

ONT1:41 pmOntario

Aug 24

ONT6:10 amOntario

7h 52m

1 stop

BZN3:02 pmBozeman Gallatin Field

$235

Find similar

American Airlines

Aug 21

FCA3:29 pmKalispell Glacier Park

7h 45m

1 stop

ONT10:14 pmOntario

Aug 26

ONT6:10 amOntario

7h 29m

1 stop

FCA2:39 pmKalispell Glacier Park

$241

Find similar

American Airlines

Sep 20

BIL6:00 amBillings Logan Intl

13h 16m

2 stops

ONT6:16 pmOntario

Sep 23

ONT12:47 pmOntario

8h 02m

1 stop

BIL9:49 pmBillings Logan Intl

$265

Find similar

Delta flights from Montana to Ontario

Our best Delta deals on Montana to Ontario flight tickets

Delta

Oct 11

BZN5:30 pmBozeman Gallatin Field

6h 19m

1 stop

ONT10:49 pmOntario

Oct 13

ONT6:00 amOntario

3h 40m

1 stop

BZN10:40 amBozeman Gallatin Field

$237

Find similar

Delta

Nov 24

BIL5:59 pmBillings Logan Intl

6h 47m

1 stop

ONT11:46 pmOntario

Dec 2

ONT5:05 pmOntario

4h 27m

1 stop

BIL10:32 pmBillings Logan Intl

$241

Find similar

Delta

Oct 11

BZN5:30 pmBozeman Gallatin Field

6h 19m

1 stop

ONT10:49 pmOntario

Oct 13

ONT11:48 amOntario

11h 16m

2 stops

BZN12:04 amBozeman Gallatin Field

$242

Find similar

Fly from

Fly to

Route

Depart

Return

Price

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 8/15

12:40 pm-11:50 pm

1 stop12h 10m

Ontario

Sun 8/17

12:59 am-11:54 am

1 stop9h 55m

$218

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 8/21

7:25 am-1:41 pm

1 stop7h 16m

Ontario

Sun 8/24

6:10 am-3:02 pm

1 stop7h 52m

$235

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Thu 8/28

7:23 pm-11:59 pm

1 stop5h 36m

Ontario

Tue 9/2

6:00 am-2:14 pm

1 stop7h 14m

$236

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Sat 10/11

5:30 pm-10:49 pm

1 stop6h 19m

Ontario

Mon 10/13

6:00 am-10:40 am

1 stop3h 40m

$237

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 10/9

6:35 pm-12:03 am

1 stop6h 28m

Ontario

Tue 10/14

7:47 pm-12:22 pm

1 stop15h 35m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Wed 9/24

3:43 pm-9:26 am

1 stop18h 43m

Ontario

Mon 9/29

3:06 pm-12:11 am

1 stop8h 05m

$240

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Mon 11/24

5:59 pm-11:46 pm

1 stop6h 47m

Ontario

Tue 12/2

5:05 pm-10:32 pm

1 stop4h 27m

$241

KalispellOntario

FCA - ONT

FCAONT

Kalispell Glacier Park

Thu 8/21

3:29 pm-10:14 pm

1 stop7h 45m

Ontario

Tue 8/26

6:10 am-2:39 pm

1 stop7h 29m

$241

BillingsOntario

BIL - ONT

BILONT

Billings Logan Intl

Fri 9/26

7:18 pm-12:03 am

1 stop5h 45m

Ontario

Mon 9/29

3:06 pm-12:11 am

1 stop8h 05m

$284

BozemanOntario

BZN - ONT

BZNONT

Bozeman Gallatin Field

Fri 10/10

7:34 pm-12:03 am

1 stop5h 29m

Ontario

Mon 10/13

7:10 am-1:02 pm

1 stop4h 52m

$285

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, 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 $256. If you aren’t able to travel during the month of April, then book flights to Ontario from Montana during May instead. Flights to Ontario in May, while not as cheap as those in April, still average around $279.

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

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $436. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Montana to Ontario for around $654.

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

In the afternoon is the cheapest time of day to fly from Montana to Ontario when you can find flight prices for as low as $465. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $635 on average. Flights to Ontario from Montana at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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	$111
Fastest flight time	3h 57m
Direct flights	None
Airports in Ontario	1 airport

The best one-way flight to Ontario from Montana in the past 72 hours is $111. The best round-trip flight deal from Montana to Ontario found on momondo in the last 72 hours is $218.

The fastest flight from Montana to Ontario takes 3h 57m

There are no direct flights from Montana to Ontario. Popular non-direct routes for this connection are Billings Logan Intl Airport - Ontario Airport, Missoula Johnson-Bell Field Airport - Ontario Airport and Bozeman Gallatin Field Airport - Ontario Airport.

There is 1 airport near Ontario: Ontario (ONT)

Search flight deals

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 July 2025, 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
Alaska Airlines	PriceFrom $82	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $232	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights
Delta	PriceFrom $236	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
Southwest	PriceFrom $256	Free Cancellation	Rating 8.0 4,246 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.