ONT - MSO

$178 Find Cheap Flights from Ontario to Missoula

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Missoula departing on 1/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Missoula

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Missoula, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Missoula, as well as popular online travel agencies
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$236
Overall average: $264
Alaska Airlines
Wed 1/21Sat 1/24
ONT - MSO • 1 stop
Cheapest one-way
$178
Typical prices: $290-$391
Multiple Airlines
Thu 1/1
ONT - MSO • 1 stop
When to travel
January
Cheapest • 39% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Missoula!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Missoula (ONT-MSO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Missoula that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Missoula

Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
7:00 am - 1:23 pm
ONT
-
MSO
5h 23m1 stop
Alaska Airlines Logo
2:03 pm - 8:36 pm
MSO
-
ONT
7h 33m1 stop
$236Alaska Airlines
Fri, Jan 23 - Mon, Jan 26
Alaska Airlines Logo
4:03 pm - 3:31 pm
ONT
-
MSO
22h 28m1 stop
Alaska Airlines Logo
6:23 am - 11:56 pm
MSO
-
ONT
18h 33m1 stop
$254Alaska Airlines
Thu, Feb 26 - Mon, Mar 2
Alaska Airlines Logo
4:02 pm - 11:59 pm
ONT
-
MSO
6h 57m1 stop
Alaska Airlines Logo
1:39 pm - 11:32 pm
MSO
-
ONT
10h 53m1 stop
$260Alaska Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
7:00 am - 11:55 pm
ONT
-
MSO
15h 55m2 stops
Alaska Airlines Logo
4:20 pm - 8:36 pm
MSO
-
ONT
5h 16m1 stop
$265Alaska Airlines
Fri, Feb 6 - Mon, Feb 9
Alaska Airlines Logo
4:03 pm - 3:31 pm
ONT
-
MSO
22h 28m1 stop
Alaska Airlines Logo
2:03 pm - 3:08 pm
MSO
-
ONT
26h 05m1 stop
$274Alaska Airlines
Mon, Jan 5 - Wed, Jan 7
United Airlines Logo
5:05 am - 1:36 pm
ONT
-
MSO
7h 31m1 stop
United Airlines Logo
6:00 am - 12:47 pm
MSO
-
ONT
7h 47m1 stop
$279United Airlines
Mon, Jan 12 - Wed, Jan 28
Alaska Airlines Logo
4:03 pm - 11:55 pm
ONT
-
MSO
6h 52m1 stop
Alaska Airlines Logo
2:03 pm - 8:36 pm
MSO
-
ONT
7h 33m1 stop
$282Alaska Airlines
Thu, Feb 26 - Mon, Mar 2
Delta Logo
7:30 am - 5:23 pm
ONT
-
MSO
8h 53m2 stops
Delta Logo
6:05 pm - 11:49 pm
MSO
-
ONT
6h 44m1 stop
$283Delta
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
7:00 am - 11:55 pm
ONT
-
MSO
15h 55m2 stops
Alaska Airlines Logo
6:23 am - 8:10 pm
MSO
-
ONT
14h 47m2 stops
$293Alaska Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
1:46 pm - 11:55 pm
ONT
-
MSO
9h 09m2 stops
Alaska Airlines Logo
6:23 am - 5:03 pm
MSO
-
ONT
11h 40m2 stops
$303Alaska Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Missoula flights

Get data-powered insights and trends into flights from Ontario to Missoula to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Ontario to Missoula?

The average price of all round-trip flights from Ontario to Missoula clicked on KAYAK for each day over the last 12 months.

When flying from Ontario to Missoula, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Ontario, you’ll find the best rates on Thursdays and the most expensive ones on Tuesdays.

What is the cheapest month to fly from Ontario to Missoula?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Missoula, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Missoula is January, where tickets cost $264 (return) on average. On the other hand, the most expensive months are February and December, where the average cost of round-trip tickets is $574 and $563 respectively.

Good to know

Low seasonMarch
Cheapest flight$178
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Ontario to Missoula

When to book flights from Ontario to Missoula

Are your dates flexible? Find out the best times to travel from Ontario to Missoula based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Missoula

  • What is the cheapest flight from Ontario to Missoula?

    In the last 3 days, the lowest price for a flight from Ontario to Missoula was $178 for a one-way ticket and $236 for a round-trip.

  • Do I need a passport to fly between Ontario and Missoula?

    A passport is not required to fly from Ontario to Missoula.

  • Which aircraft models fly most regularly from Ontario to Missoula?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Missoula?

    SkyTeam, and oneworld are the airline alliances operating flights between Ontario and Missoula, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Ontario to Missoula, Alaska Airlines or Delta?

    The two airlines most popular with KAYAK users for flights from Ontario to Missoula are Alaska Airlines and Delta. With an average price for the route of $412 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $394 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Ontario to Missoula?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Missoula.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Missoula?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Missoula from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Missoula?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Missoula with an airline and back to Ontario with another airline. Booking your flights between Ontario and MSO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Missoula?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Missoula from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Ontario to Missoula

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Missoula. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Missoula? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 11483 reviews
8.1Boarding
7.8Comfort
8.5Crew
7.0Entertainment
7.1Food
Airline reviews

See previous. It was the flight from Honolulu to Kapalua that was cancelled.

8.0 ExcellentEvie, Dec 2025
SAN - HNL
Read more Alaska Airlines reviews

See previous. It was the flight from Honolulu to Kapalua that was cancelled.

The flight attendants were excellent and I was in the back of the plane. Much much better than recent JetBlue experiences on that route and better than Delta on that route.

I’m not sure there is anything that can be improved, even the cost was fantastic.

Poor. They should have given me a row with more room and instead they put me in a middle seat with two strangers next to me

They were so kind to us! The entire staff were so good to us when we had our service dog join our trip and we couldn't be more grateful!

Larger seats with a bit more room would be good! Thanks for all your hard work. I think we are all feeling a bit down these days economically and your positive attitudes, both from SJC to Seattle and from Seattle to Bozeman makes more of a difference than you can see! Thank you and Merry Christmas! I hope all your financial needs are met and that very good things come your way.

Larger seats and more room would elevate the experience. Otherwise, it was good!

Flight crew and flight were good. But it departed two hours late.

They changed our flight from a one stop 3 hour layover to a non-stop. Saved us hours and got us there sooner.

The ground crew did not supply drink or snacks during the layover in SFO. So there weren't many options. Otherwise, it was all great.

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

Everything you need to know for your flight from Ontario to Missoula

Information on your arrival and departure airports