MSO - ONT

$126 Find Cheap Flights from Missoula to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Missoula to Ontario departing on 4/10. 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 Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Missoula to Ontario, 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 Missoula to Ontario, as well as popular online travel agencies
Travelers love KAYAK
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Everything you should know

Cheapest round-trip
$257
Overall average: $344
Multiple Airlines
Mon 5/18Wed 5/27
MSO - ONT • 1 stop
Cheapest one-way
$126
Typical prices: $185-$288
Multiple Airlines
Fri 4/10
MSO - ONT • 1 stop
Top airlines
Cheapest • from $277 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Missoula and Ontario. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $395 (round-trip)
Shortest trip • 5h 03m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 36% price drop
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 Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Missoula to Ontario (MSO-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Missoula to Ontario 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 Missoula to Ontario

Mon, May 18 - Wed, May 27
Multiple Airlines Logo
8:54 pm - 7:32 pm
MSO
-
ONT
23h 38m
1 stop
Multiple Airlines Logo
4:39 pm - 9:23 am
ONT
-
MSO
15h 44m
1 stop
$257Multiple Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
3:55 pm - 10:32 pm
MSO
-
ONT
7h 37m
1 stop
Alaska Airlines Logo
6:00 am - 12:28 pm
ONT
-
MSO
5h 28m
1 stop
$277Alaska Airlines
Tue, May 19 - Thu, May 21
Delta Logo
6:05 pm - 11:34 pm
MSO
-
ONT
6h 29m
1 stop
Delta Logo
4:57 pm - 12:22 am
ONT
-
MSO
6h 25m
1 stop
$299Delta
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
3:55 pm - 9:45 am
MSO
-
ONT
18h 50m
1 stop
Alaska Airlines Logo
6:00 am - 12:28 pm
ONT
-
MSO
5h 28m
1 stop
$304Alaska Airlines
Tue, May 19 - Sun, May 24
Delta Logo
6:05 pm - 11:34 pm
MSO
-
ONT
6h 29m
1 stop
Delta Logo
5:55 pm - 11:16 pm
ONT
-
MSO
4h 21m
1 stop
$312Delta
Sun, May 24 - Wed, May 27
Multiple Airlines Logo
10:13 am - 3:09 pm
MSO
-
ONT
5h 56m
1 stop
Multiple Airlines Logo
1:39 pm - 9:23 am
ONT
-
MSO
18h 44m
1 stop
$313Multiple Airlines
Fri, Apr 10 - Mon, Apr 13
Multiple Airlines Logo
8:54 pm - 11:39 am
MSO
-
ONT
15h 45m
1 stop
Multiple Airlines Logo
11:10 am - 8:04 pm
ONT
-
MSO
7h 54m
1 stop
$314Multiple Airlines
Thu, May 21 - Wed, May 27
Delta Logo
5:30 am - 8:53 am
MSO
-
ONT
4h 23m
1 stop
Delta Logo
4:57 pm - 12:22 am
ONT
-
MSO
6h 25m
1 stop
$321Delta
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
3:55 pm - 9:45 am
MSO
-
ONT
18h 50m
1 stop
Alaska Airlines Logo
6:00 am - 12:28 pm
ONT
-
MSO
5h 28m
1 stop
$325Alaska Airlines
Mon, May 18 - Wed, May 27
Delta Logo
5:30 am - 8:53 am
MSO
-
ONT
4h 23m
1 stop
Delta Logo
1:35 pm - 12:22 am
ONT
-
MSO
9h 47m
2 stops
$326Delta
Booking Insights

KAYAK's insights & trends for Missoula to Ontario flights

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Missoula to Ontario, 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 Missoula to Ontario is January, where tickets cost $236 (return) on average. On the other hand, the most expensive months are July and December, where the average cost of round-trip tickets is $580 and $454 respectively.

Good to know

Low seasonJuly
Cheapest flight$126
Best time to beat the crowds but there is an average 56% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Missoula to Ontario

When to book flights from Missoula to Ontario

Are your dates flexible? Find out the best times to travel from Missoula to Ontario 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 Missoula to Ontario

  • What is the cheapest flight from Missoula to Ontario?

    In the last 3 days, the lowest price for a flight from Missoula to Ontario was $126 for a one-way ticket and $257 for a round-trip.

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

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

  • Which airports will I be using when flying from Missoula to Ontario?

    When flying out of Missoula you will be using Missoula Johnson-Bell Field. You will be landing at Ontario, also known as Ontario.

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

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

  • Which airline alliances offer flights from Missoula to Ontario?

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

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

    The two airlines most popular with KAYAK users for flights from Missoula to Ontario are Delta and Alaska Airlines. With an average price for the route of $340 and an overall rating of 7.9, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $353 and an overall rating of 7.9.

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

    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 Missoula to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Missoula 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 Missoula to Ontario?

    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 Ontario with an airline and back to Missoula with another airline. Booking your flights between Missoula and ONT 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 Missoula to Ontario?

    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 Ontario from Missoula up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Missoula to Ontario

 
See real verified KAYAK customer reviews for airlines flying from Missoula to Ontario. 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 Missoula to Ontario? 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.
7.9
Alaska AirlinesOverall score based on 12091 reviews
8.1Boarding
8.5Crew
7.0Entertainment
7.0Food
7.8Comfort
Airline reviews

Four hour delay. Missed our event. And they offered me $75. Absolutely shameful.

2.0 MediocreEric, Mar 2026
SFO - SAN
Read more Alaska Airlines reviews

Four hour delay. Missed our event. And they offered me $75. Absolutely shameful.

i canceled my flight from SEA to SFO, SNA to SEA and received full refund from Alaska Airlines. i am pleased with the customer service.

I have been flying commercial for decades. I was in one of the ladder boarding groups, had my bag tagged because they thought there was not going to be enough space for it in the overhead bins. I politely asked one of the attendance if I could try to find a space- she said I could and I did. I then took the bag tag off and gave it to one of the other attendants as I was told to do by the first one. He, in a curt, anal, and disrespectful manner, told me that I needed to take my bag down from the overhead bin and check it. This was a situation I’ve never encountered before. The attendant’s attitude was confrontational and belittling in front of other onlooking passengers as if daring me to challenge him. I am a physician who takes care of patients day in and day out. Not wanting to make a scene, I calmly told him, “do what you need to do.” he took my bag down from the overhead bin, put the back tag back on it, and checked it only to make room for another bag that was also supposed to be technically checked by a following passenger. The same male attendant later came up to me and said “you shouldn’t have showed me the bag tag,” as if conveying that he was just following protocol was a justification for treating me like a kid out of line. I cared about this because it took 15 minutes from my life to then retrieve the bag at baggage claim and it also felt like really poor customer service. I understand the need for protocols. This is also a service industry, and we the passengers are the clients. We should be made to feel welcome and respected and our life in transit made as easy as it can be within reason. This attendant clearly needs to be reminded of that. Of note, an older female fellow passenger sitting next to me agreed with this assessment.

Departing flight for our weekend trip was cancelled due to weather which meant our return flight was useless. The whole thing was difficult to get support through but Alaska did recover and was able to reimburse us for the flights yesterday. For some reason, Kayak was not kept in the loop, adding to the confusion.

i canceled my return flight package with Alaska Airlines. Customer Service was excellent and assisted me to cancelled both of our reservations and returned the payment in full. that is excellent service and understanding and empathy of the customers' needs. i like Alaska Airlines and recommend AS to everyone.

You sent me an email saying boarding was at 9:29 and AA sent one that was 8:29 on Sunday morning. I had to call AA to get that it was indeed 8:29.

The airport crew and on board experience was fine. The problem with Alaska air is that there is zero customer service over the phone when you’re trying to buy your ticket or change anything.

The front desk attendant was rude to everyone in an absolutely careless way.

Good as usual. Just wished my seat was assigned at online check in. Thanks anyways

The flight attendant was friendly and attentive. Although our interaction was brief—- it made a difference. The crew was upfront about turbulence. I like the Maui pretzels.

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

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.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Overall we had a good experience during our flight from San Francisco to Houston.

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

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

Information on your arrival and departure airports