MSO - ONT

$161 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 9/30. 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

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
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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

Fri, Oct 10 - Sun, Oct 12
Frontier Logo
12:50 pm - 11:50 pmMSO-ONT
12h 00m1 stop
Frontier Logo
6:53 am - 11:55 amONT-MSO
28h 02m1 stop
$240Frontier
Find Deal
Thu, Oct 23 - Mon, Oct 27
Alaska Airlines Logo
6:40 pm - 12:03 amMSO-ONT
6h 23m1 stop
Alaska Airlines Logo
6:00 am - 12:19 pmONT-MSO
5h 19m1 stop
$260Alaska Airlines
Find Deal
Fri, Oct 24 - Thu, Oct 30
Delta Logo
6:20 pm - 11:39 pmMSO-ONT
6h 19m1 stop
Delta Logo
4:35 pm - 12:17 amONT-MSO
6h 42m1 stop
$261Delta
Find Deal
Wed, Oct 22 - Sat, Oct 25
Hawaiian Airlines Logo
2:07 pm - 6:33 pmMSO-ONT
5h 26m1 stop
Hawaiian Airlines Logo
6:00 am - 12:18 pmONT-MSO
5h 18m1 stop
$281Hawaiian Airlines
Find Deal
Wed, Oct 22 - Sat, Oct 25
Alaska Airlines Logo
2:07 pm - 6:33 pmMSO-ONT
5h 26m1 stop
Alaska Airlines Logo
6:00 am - 12:18 pmONT-MSO
5h 18m1 stop
$286Alaska Airlines
Find Deal
Thu, Dec 25 - Tue, Jan 13
Alaska Airlines Logo
5:20 am - 12:08 pmMSO-ONT
7h 48m1 stop
Alaska Airlines Logo
6:00 am - 1:52 pmONT-MSO
6h 52m1 stop
$295Alaska Airlines
Find Deal
Sat, Nov 22 - Thu, Nov 27
Delta Logo
6:18 pm - 9:35 pmMSO-ONT
4h 17m1 stop
Delta Logo
6:00 am - 12:33 pmONT-MSO
5h 33m1 stop
$305Delta
Find Deal
Wed, Nov 19 - Sun, Nov 23
United Airlines Logo
2:35 pm - 8:44 pmMSO-ONT
7h 09m1 stop
United Airlines Logo
5:05 am - 1:33 pmONT-MSO
7h 28m1 stop
$308United Airlines
Find Deal
Fri, Nov 21 - Thu, Nov 27
Delta Logo
6:18 pm - 11:52 pmMSO-ONT
6h 34m1 stop
Delta Logo
6:00 am - 12:33 pmONT-MSO
5h 33m1 stop
$321Delta
Find Deal
Thu, Oct 9 - Mon, Oct 13
United Airlines Logo
6:25 am - 12:51 pmMSO-ONT
7h 26m1 stop
United Airlines Logo
5:05 am - 1:27 pmONT-MSO
7h 22m1 stop
$360United Airlines
Find Deal

Everything you should know

Top airlines
Frontier
Cheapest • from $240 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
January
Cheapest • 43% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$240
Overall average: $335
Frontier
Fri 10/10Sun 10/12
MSO - ONT • 1 stop
Cheapest one-way
$161
Typical prices: $231-386
Delta
Tue 9/30
MSO - ONT • 1 stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Ontario!
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’s the cheapest day of the week to fly from Missoula to Ontario?

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

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

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 $229 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $1,058 and $480 respectively.

Good to know

Low seasonDecember
Cheapest flight$161
Best time to beat the crowds but there is an average 163% increase in price.
Most popular time to fly and prices are also 17% 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 $161 for a one-way ticket and $240 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?

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

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

    The two airlines most popular with KAYAK users for flights from Missoula to Ontario are Alaska Airlines and Delta. With an average price for the route of $325 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 $335 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 airlines flying 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Entertainment
7.1Food
7.8Comfort
8.5Crew
8.1Boarding
Airline reviews

All flights were on time. No crowded and had empty seats. All flight attendents were great.

10.0 ExcellentAnonymous, Sep 2025SEA - SAN
Read more Alaska Airlines reviews

All flights were on time. No crowded and had empty seats. All flight attendents were great.

Awesome. Great flight. Super nice people and I like the extra space

It was not clear the check in shd be at Hawaiian Terminal 1. I got dropped off at Alaska Terminal 2. I did the long walk from terminal 2 to 1. Fortunately I didn’t have a check in bag.

Seattle airport is a mess. New bag tag system has potential, but you need more signage to guide passengers through the process as to where to go next. Told to go in one direction and then met with a very rude agent when we did. He blamed his attitude on all the folks flying over labor day that were paying his salary. Gate area for D3 is a mess compared to the North terminal. Overall Alaska is number 1 in my book.

This time it is good, no delay and right on time

Staff inside Portland terminal were rude, made us fell rushed and not at all accommodating to seniors. For this alone I will probably never booked from them again.

It was a good experience! Thank you:) No sparkling mineral water… 🥲

On time, WiFi worked, reasonable legroom, helpful staff. Unfortunately there was no water for handwashing in the rear lavatory.

The airline staff was great! The best safety review ive ever had!

No food but only snack was provided during the 6-hour flight from EWR to LAX. I was so hungry during the trip.

I was uncomfortably cold on the plane. Other than that it was uneventful and therefore as enjoyable as a plane ride can be.

Food was surprisingly good but the WiFi was not great

My flight was extremely cold. I had a jacket and a cover was left in each seat. The cover was extremely thin and I have a disability, fibromyalgia and arthrithis and AC air is the worst. I closed my vent and my husbands vent and it still was frigid. I asked the attendant if I could get another cover and she quickly almost dismissively and totally unconcerned stating, (I quote) (one per chair) and walked off so quickly that I didn't get a chance to explain to her that I literally have adisability. I didnt want to make a seen so I set on that flight for over 5 hours in pain, joints locking up and extremely uncomfortable. When my fibromyalgia flares up my joints not only ache but they will lock up also and it takes me days to get back to my regular self even though I take medication for it. I felt like it would not have hurt anyone at all for her to just give me an extra cover because I'm sure they have all types of medical issues in people that fly every day.

Not a "Delta" issue, but a JFK issue: We booked a connecting flight with 3 1/2 hours between to clearn immigration and customs. Our inbound flight (BCN to JFK) was on the taxiway 45 minutes which ate into our layover time. Immigtration was insanely quick with the CBP MPC app; however, clearing TSA (again, after we were ALREADY cleared in Spain on the inbound international flight) took over 95 minutes. This left us with 10 minutes before boarding the connecting flight (JFK to SAN) to walk to the far end of Terminal 4 and try to find food. We didn't find any food that could promise to serve us in under 10 minutes so we boarded the Delta flight after coming off a plance and an 8-hour flight knowing that we wouldn't be served any food on the next 5 1/2 hour flight. I feel like Delta needs to put pressure on the JFK TSA to open more screening stations (by our count, we saw only 5 scanners open and a line of - as we said - over 90 minutes. The insult is that we WERE ALREADY SCREENED through TSA, but as you come off one flight into the USA, you have to go through the whole process again. It seems like if you have a connecting flight, there should be a way to pass through immigration and customs without needing to return through TSA.

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

5 hours of delay that could've been much shorter if Delta had taken the 1 hour delay they imposed on the flight before boarding to run any of the plane checks required for flight to find the hydraulic issue that required nearly 3 hours to fix. $24 of meal credit buys a sandwich and a soft drink. Poor communication within the terminal about what gate we'd be re-boarding from and when we'd be re-boarding.

The entertainment and wifi mostly didn't work on this flight.

Terrible entertainment system - kept freezing and audio kept cutting out. Snacks were mediocre at best for a 5 hour flight.

I am still upset that my bag was lost on a recent trip to Rome ; we were inconvenienced and out €150 Euros ; delta has refused to reimburse us

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

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

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