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Cheap Flights from Kalispell (FCA) to Ontario (ONT)

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      Travellers and cabin class, 1 Adult, Economy

      Compare Kalispell to Ontario International flight deals

      Find the cheapest month or even day of the year to fly to Ontario International

      Book the best Ontario International fare with no extra fees

      Flight deals from Kalispell to Ontario International

      Looking for a cheap last-minute deal or the best return flight from Kalispell Airport to Ontario International Airport? If you want to travel next month, return fares start from $424. Find the lowest prices on one-way and return tickets right here.
      Ontario.$397 per passenger.Departing Tue, 30 Mar, returning Tue, 6 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Tue, 30 Mar, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Tue, 6 Apr, arriving in Kalispell.Price includes taxes and charges.From $397, select.
      Ontario.$397 per passenger.Departing Tue, 12 Jan, returning Tue, 26 Jan.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Tue, 12 Jan, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Tue, 26 Jan, arriving in Kalispell.Price includes taxes and charges.From $397, select.
      Ontario.$397 per passenger.Departing Tue, 2 Mar, returning Tue, 9 Mar.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Tue, 2 Mar, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Tue, 9 Mar, arriving in Kalispell.Price includes taxes and charges.From $397, select.
      Ontario.$424 per passenger.Departing Thu, 27 Aug, returning Mon, 31 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Thu, 27 Aug, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Mon, 31 Aug, arriving in Kalispell.Price includes taxes and charges.From $424, select.
      Ontario.$425 per passenger.Departing Sat, 3 Apr, returning Sat, 10 Apr.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Sat, 3 Apr, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sat, 10 Apr, arriving in Kalispell.Price includes taxes and charges.From $425, select.
      Ontario.$472 per passenger.Departing Tue, 23 Feb, returning Tue, 2 Mar.Return flight with United.Outbound indirect flight with United, departs from Kalispell on Tue, 23 Feb, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 2 Mar, arriving in Kalispell.Price includes taxes and charges.From $472, select.
      Ontario.$539 per passenger.Departing Wed, 4 Nov, returning Mon, 16 Nov.Return flight with Alaska Airlines.Outbound indirect flight with Alaska Airlines, departs from Kalispell on Wed, 4 Nov, arriving in Ontario International.Inbound indirect flight with Alaska Airlines, departs from Ontario International on Mon, 16 Nov, arriving in Kalispell.Price includes taxes and charges.From $539, select.
      Ontario.$543 per passenger.Departing Sun, 4 Oct, returning Sat, 17 Oct.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Sun, 4 Oct, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sat, 17 Oct, arriving in Kalispell.Price includes taxes and charges.From $543, select.
      Ontario.$560 per passenger.Departing Tue, 25 May, returning Tue, 8 Jun.Return flight with United.Outbound indirect flight with United, departs from Kalispell on Tue, 25 May, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Tue, 8 Jun, arriving in Kalispell.Price includes taxes and charges.From $560, select.
      Ontario.$585 per passenger.Departing Mon, 27 Jul, returning Sun, 2 Aug.Return flight with Delta.Outbound indirect flight with Delta, departs from Kalispell on Mon, 27 Jul, arriving in Ontario International.Inbound indirect flight with Delta, departs from Ontario International on Sun, 2 Aug, arriving in Kalispell.Price includes taxes and charges.From $585, select.
      Ontario.$1,305 per passenger.Departing Sat, 18 Jul, returning Mon, 27 Jul.Return flight with United.Outbound indirect flight with United, departs from Kalispell on Sat, 18 Jul, arriving in Ontario International.Inbound indirect flight with United, departs from Ontario International on Mon, 27 Jul, arriving in Kalispell.Price includes taxes and charges.From $1,305, select.

      Find the cheapest month to fly from Kalispell to Ontario International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Kalispell to Ontario International flights are currently cheapest in January.
      Jul
      from $1,305
      Aug
      from $424
      Sep
      Find prices
      Oct
      from $543
      Nov
      from $539
      Dec
      Find prices
      Jan
      from $397
      Feb
      Find prices
      Mar
      from $397
      Apr
      from $425
      May
      Find prices
      Jun
      Find prices

      Kalispell to Ontario International: Alternative routes

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

      Ontario International

      4km from central Ontario
      ClosestCheapest
      from $397
      Search flights

      San Bernardino Norton AFB

      39km from central Ontario
      Search flights

      Santa Ana John Wayne

      48km from central Ontario
      from $460
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      Long Beach Municipal

      54km from central Ontario
      from $1,033
      Search flights

      Hawthorne

      65km from central Ontario
      Search flights

      Burbank

      67km from central Ontario
      from $413
      Search flights

      Los Angeles International

      71km from central Ontario
      from $429
      Search flights

      Kalispell to Ontario: Flight information

      The things to know before you go.
      Cheapest flight found$397
      Cheapest month to flyMarch

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

      The best price we found for a return flight from Kalispell to Ontario International is $397. 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 Kalispell to Ontario International. But we found flights with one or more stops from $397.
      As of July 2026, there are no flights flying from Kalispell to Ontario International.
      The cheapest month to fly from Kalispell to Ontario International is usually March.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Kalispell Airport to Ontario International Airport on Tuesday, 30 March 2027.
      No airlines currently offer direct flights between Kalispell Airport and Ontario International 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 Ontario International 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 Ontario is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Delta offers the cheapest flight tickets to Ontario International.

      Travelling from Kalispell Airport (FCA) to Ontario International Airport (ONT): what you need to know

      • Ontario is one hour behind Kalispell and observes the UTC-8 timezone.

      • Arriving two hours before an international flight and one hour ahead of a domestic departure are tried-and-true travel tips. Get to the airport on time to board your FCA to ONT flight.

      • Travelling during a peak time such as August? Public holidays and other popular periods can result in longer queues at check-in and security. Be extra cautious and arrive up to four hours before international flights and two hours before domestic departures.

      • Consider adding a stopover when booking your ticket from Kalispell Airport to Ontario International Airport. Just uncheck 'Direct flights only' to break up your trip, or visit a new city along the way. Here are some options between FCA and ONT:

        • Denver International Airport

        • Salt Lake City Airport

        • Oakland Metropolitan Oak Airport

      How to find the cheapest flights from Kalispell Airport (FCA) to Ontario International Airport (ONT)

      • $198 is currently the best price for a one-way Kalispell Airport to Ontario International Airport flight. A return flight starts at $397. These prices may change depending on availability and demand.

      • It's often best to book in advance if you want to get cheap tickets from FCA to ONT. That's because flight prices are based on demand, which tends to rise closer to departure.

      • The 'Whole month' tool shows you the cheapest flights from Kalispell Airport to Ontario International Airport throughout the entire month. It's a good way to find a bargain if your plans are flexible.

      • Stay on top of deals for cheap flights from FCA to ONT by setting up a Price Alert. You'll receive an email or notification on the app when a lower fare pops up.

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

      Handy information about Kalispell Airport (FCA)

      • You'll find FCA at 4170 Highway 2 East.

      • 83% of flights leaving Kalispell Airport arrive at their destination as planned. Given its strong on-time stats, delays are unlikely when flying out of FCA.

      • To get to Kalispell Airport from central Kalispell, it'll take around 15 minutes if you're going by car. Of course, this depends on traffic. It's approximately 11 kilometres from the airport to the city centre.

      • Planning to take public transport? You can expect a journey time of around 30 minutes.

      • Have an early flight from Kalispell Airport to Ontario International Airport? Avoid the hassle of rushing to the airport (and get some extra shut-eye) by choosing one of these hotels close to FCA:

      Arriving at Ontario International Airport (ONT)

      When to fly to Ontario International Airport (ONT)

      • July is the busiest month for flights from Kalispell Airport to Ontario International Airport. For smaller crowds, visit Ontario in March.

      • Book your flight from Kalispell Airport to Ontario International Airport for August if you want to explore Ontario during its warmest month. You can expect temperatures of between 16ºC (61ºF) and 36ºC (97ºF).

      • February sees average temperatures of between 4ºC (39ºF) and 24ºC (75ºF). Look for cheap tickets from FCA to ONT around that time if you'd rather travel in cooler conditions.

      Explore more of the United States

      • Los Angeles is just one of the many places in the United States waiting to be discovered once you've seen Ontario. Around 56 kilometres away to the west, its top attractions include Hollywood Sign, Universal Studios Hollywood and Hollywood Bowl.

      • If you're interested in discovering another side of the United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, San Diego Balboa Park and USS Midway Museum are among its highlights.

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      Plan the rest of your trip from Kalispell to Ontario

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.