Cheap Flights from Ontario International to Missoula

Compare Ontario International to Missoula flight deals

Find the cheapest month or even day of the year to fly to Missoula

Book the best Missoula fare with no extra fees

Find the cheapest month to fly from Ontario International to Missoula

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Ontario International to Missoula flights are currently cheapest in June.

Ontario International to Missoula: Alternative routes

Compare routes from Ontario International to Missoula below. You may find an airport to fly into that's cheaper, faster, or easier than Missoula.

Ontario to Missoula: Flight information

The things to know before you go.
Cheapest flight foundR 3,331
Cheapest month to flyJune

Finding cheap flights from Ontario International to Missoula: Frequently asked questions

The best price we found for a return flight from Ontario International to Missoula is R 3,457. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Ontario International to Missoula. But we found flights with one or more stops from R 3,457.
As of February 2026, there are no flights flying from Ontario International to Missoula.
The cheapest month to fly from Ontario International to Missoula is usually April.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Ontario International Airport to Missoula Airport on Tuesday, 28 April 2026.
No airlines currently offer direct flights between Ontario International Airport and Missoula Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Missoula but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Missoula is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to Missoula.

Travelling from Ontario International Airport (ONT) to Missoula International Airport (MSO): what you need to know

  • To ensure you catch your ONT to MSO flight, leave plenty of time for things like check-in and baggage drop. Arriving two hours ahead of international departures and an hour before domestic flights is the general travel rule.

  • During popular months such as August, it's best to get to the airport earlier than usual. Arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during a peak period in general.

  • If you want to include a stop along the way, just deselect 'Direct flights only' when searching for your ticket from Ontario International Airport to Missoula International Airport. These are the most popular stopovers between ONT and MSO:

    • Harry Reid Airport (formerly McCarran Airport)

    • Metropolitan Oakland International Airport

    • Phoenix Sky Harbour International Airport

How to find the cheapest flights from Ontario International Airport (ONT) to Missoula International Airport (MSO)

  • R 3,331 is currently the best price for a one-way Ontario International Airport to Missoula International Airport flight. A return flight starts at R 3,457. These fares may change based on demand.

  • To score cheap tickets from ONT to MSO, book in advance. Airlines typically offer the most competitive fares when flights are first released.

  • The 'Whole month' tool shows you the cheapest flights from Ontario International Airport to Missoula International Airport throughout the entire month. It's an easy way to snap up a bargain if your plans aren't set in stone.

  • Cut down on the time spent looking for cheap flights from ONT to MSO by creating a Price Alert. You'll receive an email or notification on the app when fares go down.

  • Tailor your flights with filters. Choose your departure and arrival times, total journey duration and airlines. You can also sort the results by 'Best,' 'Cheapest' or 'Fastest' flights from Ontario International Airport to Missoula International Airport.

Handy information about Ontario International Airport (ONT)

  • You'll find ONT at 2900 E. Airport Drive.

  • Ontario International Airport maintains a solid on-time record, so you're less likely to experience disruptions. Departures from ONT land on schedule 83.6% of the time.

  • Ontario International Airport is about 6 kilometres from central Ontario. If you're ride-sharing, catching a cab or driving from the centre, it'll take you 10 minutes or so to get there, depending on the traffic.

  • The journey on public transport usually takes 1 hour 30 minutes.

  • Have an early flight from Ontario International Airport to Missoula International Airport? Avoid the hassle of rushing to the airport (and catch some extra z's) by choosing one of these stays near ONT:

Arriving at Missoula International Airport (MSO)

  • The last thing you need is a long trip to your hotel if you're arriving on a late Ontario International Airport to Missoula International Airport flight. Stay at one of these accommodation options near MSO instead:

  • Pick up a Missoula International Airport rental car and explore Missoula and beyond with your own wheels. Budget, Dollar and Hertz are top providers to choose from here.

  • To get the lowest possible price, book your ride from Missoula International Airport a few weeks in advance. Prices usually increase closer to your date of travel.

Getting from Missoula International Airport (MSO) to central Missoula

  • You'll find MSO at 5225 Highway 10 West.

  • Missoula International Airport to the centre of Missoula has a drive time of about 10 minutes. It's approximately 11 kilometres away.

  • If you're travelling by public transport, expect a journey time of around 35 minutes.

When to fly to Missoula International Airport (MSO)

  • July is the most popular month for flights from Ontario International Airport to Missoula International Airport. To escape the crowds, go to Missoula in February.

  • Lock in your flight from Ontario International Airport to Missoula International Airport for July if you want to explore Missoula during its warmest month. Expect temperatures of between 8ºC (46ºF) and 33ºC (91ºF).

  • Look for cheap tickets from ONT to MSO in December if you'd rather travel during cooler conditions. Temperatures are at their lowest then, ranging between -15ºC (5ºF) and 3ºC (37ºF) on average.

Explore more of United States

  • Spokane is just one of the many places in United States waiting to be discovered after you've seen Missoula. Around 274 kilometres away to the west, check out popular attractions including Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.

  • If you're ready to explore another major destination in United States, head for Boise, roughly 402 kilometres south-west of Missoula. Idaho State Capitol Building, Old Idaho Penitentiary and Zoo Boise are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.