What airlines fly to Ontario?

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Ontario from Missoula according to our data. Alaska Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 5 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 Missoula Johnson-Bell Field to Ontario?

Alaska Airlines, United Airlines, and Delta are the most popular carriers operating from Missoula Johnson-Bell Field to Ontario

When did momondo last update prices for flights from Missoula Johnson-Bell Field Airport to Ontario Airport?

Prices for flights from Missoula Johnson-Bell Field Airport to Ontario Airport are updated daily.

How many operators does momondo search for flights from Missoula Johnson-Bell Field Airport to Ontario Airport?

As of October 2026, there are 2 operators available to choose from for flights from Missoula Johnson-Bell Field Airport to Ontario Airport.

How old do you have to be to fly from Missoula Johnson-Bell Field Airport to Ontario Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missoula Johnson-Bell Field Airport to Ontario Airport.

What documentation or ID do you need to fly to Ontario Airport?

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$235 Cheap Flights from Missoula to Ontario in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Missoula to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:39 pm - 11:32 amMSO Missoula Johnson-Bell Field-ONT Ontario

17h 53m1 stop Las Vegas Harry Reid Intl

7:26 pm - 5:49 pmONT Ontario-MSO Missoula Johnson-Bell Field

45h 23m2 stops San Francisco Las Vegas Harry Reid Intl

$269Multiple Airlines

Wed, Dec 2 - Mon, Dec 7

5:42 pm - 7:07 amMSO Missoula Johnson-Bell Field-ONT Ontario

14h 25m1 stop Las Vegas Harry Reid Intl

8:02 am - 6:02 pmONT Ontario-MSO Missoula Johnson-Bell Field

33h 00m2 stops Las Vegas Harry Reid Intl Phoenix Sky Harbor Intl

$358Multiple Airlines

Mon, Feb 1 - Wed, Mar 3

10:07 am - 4:21 pmMSO Missoula Johnson-Bell Field-ONT Ontario

7h 14m1 stop Las Vegas Harry Reid Intl

8:31 pm - 5:49 pmONT Ontario-MSO Missoula Johnson-Bell Field

44h 18m2 stops San Francisco Las Vegas Harry Reid Intl

$362Multiple Airlines

Thu, Nov 19 - Mon, Nov 30

5:42 pm - 7:07 amMSO Missoula Johnson-Bell Field-ONT Ontario

14h 25m1 stop Las Vegas Harry Reid Intl

6:27 pm - 3:23 pmONT Ontario-MSO Missoula Johnson-Bell Field

19h 56m1 stop Las Vegas Harry Reid Intl

$366Multiple Airlines

Mon, Feb 1 - Thu, Mar 4

12:50 pm - 4:12 pmMSO Missoula Johnson-Bell Field-ONT Ontario

4h 22m1 stop Salt Lake City

6:00 am - 12:36 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 36m1 stop Salt Lake City

$469Delta

Fri, Jan 8 - Sun, Jan 10

6:10 pm - 11:48 pmMSO Missoula Johnson-Bell Field-ONT Ontario

6h 38m1 stop Salt Lake City

5:05 pm - 12:31 amONT Ontario-MSO Missoula Johnson-Bell Field

6h 26m1 stop Salt Lake City

$469Delta

Wed, Feb 3 - Mon, Mar 8

4:22 pm - 10:41 pmMSO Missoula Johnson-Bell Field-ONT Ontario

7h 19m1 stop Seattle/Tacoma Intl

6:00 am - 12:32 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 32m1 stop Seattle/Tacoma Intl

$469Alaska Airlines

Tue, Feb 2 - Mon, Mar 8

4:22 pm - 10:41 pmMSO Missoula Johnson-Bell Field-ONT Ontario

7h 19m1 stop Seattle/Tacoma Intl

6:00 am - 12:32 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 32m1 stop Seattle/Tacoma Intl

$469Alaska Airlines

Thu, Feb 4 - Wed, Mar 3

12:50 pm - 4:12 pmMSO Missoula Johnson-Bell Field-ONT Ontario

4h 22m1 stop Salt Lake City

5:05 pm - 12:31 amONT Ontario-MSO Missoula Johnson-Bell Field

6h 26m1 stop Salt Lake City

$469Delta

Thu, Feb 4 - Thu, Mar 4

2:02 pm - 6:17 pmMSO Missoula Johnson-Bell Field-ONT Ontario

5h 15m1 stop Seattle/Tacoma Intl

6:00 am - 12:22 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 22m1 stop Seattle/Tacoma Intl

$469Alaska Airlines

Thu, Nov 12 - Mon, Nov 16

Cheap last minute flights

Enter your travel dates to find the best prices.

7:00 am - 11:16 amMSO Missoula Johnson-Bell Field-ONT Ontario

5h 16m1 stop Seattle/Tacoma Intl

6:02 am - 12:26 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 24m1 stop Seattle/Tacoma Intl

$549Alaska Airlines

Fri, Oct 2 - Tue, Oct 6

7:00 am - 2:16 pmMSO Missoula Johnson-Bell Field-ONT Ontario

8h 16m1 stop Seattle/Tacoma Intl

6:02 am - 2:50 pmONT Ontario-MSO Missoula Johnson-Bell Field

7h 48m1 stop Seattle/Tacoma Intl

$549Alaska Airlines

Fri, Oct 2 - Sun, Oct 4

2:06 pm - 6:00 pmMSO Missoula Johnson-Bell Field-ONT Ontario

4h 54m1 stop Seattle/Tacoma Intl

6:56 pm - 12:26 pmONT Ontario-MSO Missoula Johnson-Bell Field

16h 30m1 stop Seattle/Tacoma Intl

$560Alaska Airlines

Sat, Oct 3 - Mon, Oct 5

1:06 pm - 8:15 pmMSO Missoula Johnson-Bell Field-ONT Ontario

8h 09m1 stop Portland

2:13 pm - 10:04 pmONT Ontario-MSO Missoula Johnson-Bell Field

6h 51m1 stop Seattle/Tacoma Intl

$582Alaska Airlines

Wed, Oct 7 - Thu, Oct 8

2:06 pm - 6:00 pmMSO Missoula Johnson-Bell Field-ONT Ontario

4h 54m1 stop Seattle/Tacoma Intl

7:25 am - 1:26 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 01m1 stop Portland

$674Alaska Airlines

Sun, Oct 4 - Tue, Oct 6

5:30 am - 9:02 amMSO Missoula Johnson-Bell Field-ONT Ontario

4h 32m1 stop Salt Lake City

6:20 am - 5:43 pmONT Ontario-MSO Missoula Johnson-Bell Field

10h 23m2 stops Seattle/Tacoma Intl Salt Lake City

$769Delta

Fri, Oct 2 - Tue, Oct 6

12:45 pm - 12:03 pmMSO Missoula Johnson-Bell Field-ONT Ontario

24h 18m2 stops Chicago O'Hare Intl Phoenix Sky Harbor Intl

4:29 pm - 12:35 pmONT Ontario-MSO Missoula Johnson-Bell Field

19h 06m2 stops Phoenix Sky Harbor Intl Chicago O'Hare Intl

$831American Airlines

Fri, Oct 2 - Tue, Oct 6

7:03 am - 5:05 pmMSO Missoula Johnson-Bell Field-ONT Ontario

11h 02m2 stops Seattle/Tacoma Intl Santa Rosa Sonoma County

6:02 am - 12:26 pmONT Ontario-MSO Missoula Johnson-Bell Field

5h 24m1 stop Seattle/Tacoma Intl

$864Alaska Airlines

Wed, Oct 7 - Thu, Oct 8

7:03 am - 1:16 pmMSO Missoula Johnson-Bell Field-ONT Ontario

7h 13m1 stop Seattle/Tacoma Intl

6:45 pm - 2:50 pmONT Ontario-MSO Missoula Johnson-Bell Field

19h 05m2 stops Boise Air Term. Gowen Fld Seattle/Tacoma Intl

$911Alaska Airlines

Sat, Oct 3 - Mon, Oct 5

7:00 am - 3:47 pmMSO Missoula Johnson-Bell Field-ONT Ontario

9h 47m2 stops Seattle/Tacoma Intl Santa Rosa Sonoma County

6:02 am - 2:50 pmONT Ontario-MSO Missoula Johnson-Bell Field

7h 48m1 stop Seattle/Tacoma Intl

$960Alaska Airlines

Fri, Oct 2 - Sun, Oct 4

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Missoula to Ontario

Our best United Airlines deals on Missoula to Ontario flight tickets

United Airlines

Oct 13

MSO6:15 amMissoula Johnson-Bell Field

7h 31m

1 stop

ONT12:46 pmOntario

Oct 17

ONT8:03 amOntario

6h 16m

1 stop

MSO3:19 pmMissoula Johnson-Bell Field

$549

United Airlines

Dec 31

MSO6:29 amMissoula Johnson-Bell Field

6h 29m

1 stop

ONT11:58 amOntario

Jan 4

ONT5:00 amOntario

7h 33m

1 stop

MSO1:33 pmMissoula Johnson-Bell Field

$569

United Airlines

Oct 13

MSO6:15 amMissoula Johnson-Bell Field

7h 31m

1 stop

ONT12:46 pmOntario

Nov 10

ONT1:29 pmOntario

7h 18m

1 stop

MSO9:47 pmMissoula Johnson-Bell Field

$604

Alaska Airlines flights from Missoula to Ontario

Our best Alaska Airlines deals on Missoula to Ontario flight tickets

Alaska Airlines

Feb 6

MSO1:02 pmMissoula Johnson-Bell Field

8h 00m

1 stop

ONT8:02 pmOntario

Mar 3

ONT6:00 amOntario

5h 32m

1 stop

MSO12:32 pmMissoula Johnson-Bell Field

$479

Alaska Airlines

Dec 5

MSO7:01 amMissoula Johnson-Bell Field

5h 12m

1 stop

ONT11:13 amOntario

Dec 9

ONT6:00 amOntario

16h 19m

1 stop

MSO11:19 pmMissoula Johnson-Bell Field

$481

Alaska Airlines

Feb 2

MSO4:22 pmMissoula Johnson-Bell Field

7h 19m

1 stop

ONT10:41 pmOntario

Mar 6

ONT10:03 amOntario

12h 56m

2 stops

MSO11:59 pmMissoula Johnson-Bell Field

$486

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Wed 12/2

6:39 pm-11:32 am

1 stop17h 53m

Ontario

Mon 12/7

7:26 pm-5:49 pm

2 stops45h 23m

$269

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Mon 2/1

5:42 pm-7:07 am

1 stop14h 25m

Ontario

Wed 3/3

8:02 am-6:02 pm

2 stops33h 00m

$358

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Thu 11/19

10:07 am-4:21 pm

1 stop7h 14m

Ontario

Mon 11/30

8:31 pm-5:49 pm

2 stops44h 18m

$362

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Mon 2/1

5:42 pm-7:07 am

1 stop14h 25m

Ontario

Thu 3/4

6:27 pm-3:23 pm

1 stop19h 56m

$366

Quickest round-trip

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Fri 1/8

12:50 pm-4:12 pm

1 stop4h 22m

Ontario

Sun 1/10

6:00 am-12:36 pm

1 stop5h 36m

$469

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Wed 2/3

6:10 pm-11:48 pm

1 stop6h 38m

Ontario

Mon 3/8

5:05 pm-12:31 am

1 stop6h 26m

$469

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Tue 2/2

4:22 pm-10:41 pm

1 stop7h 19m

Ontario

Mon 3/8

6:00 am-12:32 pm

1 stop5h 32m

$469

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Thu 2/4

4:22 pm-10:41 pm

1 stop7h 19m

Ontario

Wed 3/3

6:00 am-12:32 pm

1 stop5h 32m

$469

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Thu 2/4

12:50 pm-4:12 pm

1 stop4h 22m

Ontario

Thu 3/4

5:05 pm-12:31 am

1 stop6h 26m

$469

MissoulaOntario

MSO Missoula Johnson-Bell Field - ONT Ontario

MSOONT

Missoula Johnson-Bell Field

Thu 11/12

2:02 pm-6:17 pm

1 stop5h 15m

Ontario

Mon 11/16

6:00 am-12:22 pm

1 stop5h 22m

$469

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 Missoula 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

What is the typical price of a round-trip flight between Missoula and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $533 to $545.
The lowest price recently found on this route was $269.

What is the cheapest month to fly to Ontario?

In general, June is the cheapest month to fly from Missoula to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $0. If you aren’t able to travel during the month of June, then book flights to Ontario from Missoula during January instead. Flights to Ontario in January, while not as cheap as those in June, still average around $236.

When to book flights from Missoula to Ontario

Are you open to changing your travel dates? Check out the ideal times to fly from Missoula to Ontario according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Missoula to Ontario (MSO to ONT) flight deals and tips

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

Best Price Found	$235
Fastest flight time	4h 08m
Direct flights	None

The best one-way flight to Ontario from Missoula in the past 72 hours is $235. The best round-trip flight deal from Missoula to Ontario found on momondo in the last 72 hours is $269.

The fastest flight from Missoula to Ontario takes 4h 08m

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

Search flight deals

Frequently asked questions about flying from Missoula to Ontario

How far is Missoula Johnson-Bell Field to Ontario by plane?
There are 904.7 mi between Missoula Johnson-Bell Field and Ontario. In terms of flight time, this usually takes a little over 4h 08m.
When did momondo last update prices for flights from Missoula Johnson-Bell Field Airport to Ontario Airport?
Prices for flights from Missoula Johnson-Bell Field Airport to Ontario Airport are updated daily.
How many operators does momondo search for flights from Missoula Johnson-Bell Field Airport to Ontario Airport?
As of October 2026, there are 2 operators available to choose from for flights from Missoula Johnson-Bell Field Airport to Ontario Airport.
How old do you have to be to fly from Missoula Johnson-Bell Field Airport to Ontario Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missoula Johnson-Bell Field Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Missoula to Ontario?
momondo data reveals that the most frequently booked airline on the route from Missoula to Ontario is Delta, representing 59% of all bookings. The subsequent popular airline is Alaska Airlines at 41%.

Best airlines flying from Missoula to Ontario

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

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $155	Free Cancellation	Rating 7.8 8,615 reviews		Search Delta flights
Alaska Airlines	PriceFrom $205	Free Cancellation	Rating 7.9 13,002 reviews		Search Alaska Airlines flights

Why use momondo?

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

It is quick and easy to find Missoula to Ontario flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Ontario that suits you.

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

Yes. All flights to Ontario from Missoula on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ontario from Missoula.

I’m not ready to book a flight from Missoula to Ontario right now. Can momondo alert me if prices change?

Price alerts on flights to Ontario from Missoula 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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Sat 10/31

Sat 11/7

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Missoula

Complete your trip

Feeling lucky

Cheap flights from Missoula to Los Angeles from $235

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missoula to Los Angeles departing on 11/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Missoula to Los Angeles

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from Missoula to Ontario

Our best United Airlines deals on Missoula to Ontario flight tickets

Alaska Airlines flights from Missoula to Ontario

Our best Alaska Airlines deals on Missoula to Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Missoula to Ontario that are best for you.

See travel insights to Los Angeles from

How to get the cheapest flight ticket from Missoula to Ontario

What is the typical price of a round-trip flight between Missoula and Ontario?

What is the cheapest month to fly to Ontario?

What is the cheapest airline that flies from Missoula Johnson-Bell Field to Ontario?

What airlines fly to Ontario?

When to book flights from Missoula to Ontario

Cheap Missoula to Ontario (MSO to ONT) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Missoula to Ontario

Best airlines flying from Missoula to Ontario

Compare and see reviews for airlines that fly from Missoula 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.

Find better results for your trip to the United States

Airports servicing California

Fly your favorite airline to Los Angeles

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

Cabin classes currently available on flights to Los Angeles

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

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Missoula

According to popular flight searches on momondo this year

Complete your trip to Los Angeles

Explore popular destinations other users love

According to popular flight searches on momondo this year