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Cheap Flights from Pittsburgh International to Ontario International

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      Travellers and cabin class, 1 Adult, Economy

      Compare Pittsburgh International 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 Pittsburgh International to Ontario International

      Looking for a cheap last-minute deal or the best return flight from Pittsburgh International Airport to Ontario International Airport? If you want to travel next month, return fares start from R 5,003. Find the lowest prices on one-way and return tickets right here.
      Ontario.R 2,423 per passenger.Departing Fri, 23 Oct.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Fri, 23 Oct, arriving in Ontario International.Price includes taxes and charges.From R 2,423, select.
      Ontario.R 2,423 per passenger.Departing Fri, 7 Aug.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Fri, 7 Aug, arriving in Ontario International.Price includes taxes and charges.From R 2,423, select.
      Ontario.R 2,423 per passenger.Departing Mon, 7 Dec.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Mon, 7 Dec, arriving in Ontario International.Price includes taxes and charges.From R 2,423, select.
      Ontario.R 2,425 per passenger.Departing Tue, 1 Sep.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Tue, 1 Sep, arriving in Ontario International.Price includes taxes and charges.From R 2,425, select.
      Ontario.R 2,900 per passenger.Departing Tue, 17 Nov.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Tue, 17 Nov, arriving in Ontario International.Price includes taxes and charges.From R 2,900, select.
      Ontario.R 3,895 per passenger.Departing Fri, 19 Feb.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Fri, 19 Feb, arriving in Ontario International.Price includes taxes and charges.From R 3,895, select.
      Ontario.R 4,242 per passenger.Departing Mon, 27 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Pittsburgh International on Mon, 27 Jul, arriving in Ontario International.Price includes taxes and charges.From R 4,242, select.
      Ontario.R 4,806 per passenger.Departing Mon, 11 Jan.One-way flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Mon, 11 Jan, arriving in Ontario International.Price includes taxes and charges.From R 4,806, select.

      Find the cheapest month to fly from Pittsburgh International to Ontario International

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Pittsburgh International to Ontario International flights are currently cheapest in August.
      Jul
      from R 4,242
      Aug
      from R 2,423
      Sep
      from R 2,425
      Oct
      from R 2,423
      Nov
      from R 2,900
      Dec
      from R 2,423
      Jan
      from R 4,806
      Feb
      from R 3,895
      Mar
      Find prices
      Apr
      Find prices
      May
      Find prices
      Jun
      Find prices

      Pittsburgh International to Ontario International: Alternative routes

      Compare routes from Pittsburgh International 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
      Closest
      from R 2,423
      Search flights

      San Bernardino Norton AFB

      39km from central Ontario
      from R 15,941
      Search flights

      Santa Ana John Wayne

      48km from central Ontario
      from R 2,194
      Search flights

      Long Beach Municipal

      54km from central Ontario
      from R 1,893
      Search flights

      Hawthorne

      65km from central Ontario
      Search flights

      Burbank

      67km from central Ontario
      from R 2,809
      Search flights

      Los Angeles International

      71km from central Ontario
      Cheapest
      from R 1,623
      Search flights

      Pittsburgh to Ontario: Flight information

      The things to know before you go.
      Cheapest flight foundR 2,423
      Cheapest month to flyOctober

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

      The best price we found for a return flight from Pittsburgh International to Ontario International is R 4,683. 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 Pittsburgh International to Ontario International. But we found flights with one or more stops from R 4,683.
      As of July 2026, there are no flights flying from Pittsburgh International to Ontario International.
      The cheapest month to fly from Pittsburgh International to Ontario International is usually August.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Pittsburgh International Airport to Ontario International Airport on Friday, 28 August 2026.
      No airlines currently offer direct flights between Pittsburgh International 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, United offers the cheapest flight tickets to Ontario International.

      Travelling from Pittsburgh International Airport (PIT) to Ontario International Airport (ONT): what you need to know

      • The timezone in Ontario is UTC-8, which is three hours behind Pittsburgh.

      • For a smooth journey, turn up at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably board your PIT to ONT flight.

      • Be prepared for longer lines in popular months like July. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a good idea.

      • If you'd like to split up your journey, just deselect 'Direct flights only' when searching for your ticket from Pittsburgh International Airport to Ontario International Airport. Here are the top stopovers between PIT and ONT:

        • Denver International Airport

        • Houston George Bush Intercntl. Airport

        • Harry Reid International Airport

      How to find the cheapest flights from Pittsburgh International Airport (PIT) to Ontario International Airport (ONT)

      • At the moment, R 2,423 is the cheapest price we've found for a one-way Pittsburgh International Airport to Ontario International Airport flight. The best price for a return ticket is R 4,683. Bear in mind that fares can change due to availability at the time of booking.

      • To pick up cheap tickets from PIT to ONT, book as early as you can. Airlines tend to offer lower fares when flights are first made available.

      • Getting cheap flights from Pittsburgh International Airport to Ontario International Airport is easy if you're flexible with your trip dates. Use the 'Whole month' function to see the lowest fares throughout the month and snap up a great deal.

      • Getting your hands on cheap flights from PIT to ONT is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you when a new deal comes up.

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

      Handy information about Pittsburgh International Airport (PIT)

      • The address for PIT is 1000 Airport Boulevard.

      • Of the flights that depart from Pittsburgh International Airport, 77% land on time at their destination.

      • To get to Pittsburgh International Airport from central Pittsburgh, it takes about 30 minutes if you're planning to drive. This depends on traffic, however. It's approximately 32 kilometres from the airport to the city centre.

      • Taking public transport? Expect a journey time of around 45 minutes.

      • Need a convenient hotel close to PIT? If you've booked an early flight from Pittsburgh International Airport to Ontario International Airport, these accommodation options will have you sleeping moments from your departure gate:

      Arriving at Ontario International Airport (ONT)

      Getting from Ontario International Airport (ONT) to central Ontario

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

      • From Ontario International Airport, Ontario is approximately 10 kilometres away. It takes around 15 minutes to drive to the centre.

      • Travelling to the centre on public transport takes about 45 minutes.

      When to fly to Ontario International Airport (ONT)

      • July is the busiest month for flights from Pittsburgh International Airport to Ontario International Airport. To skip the crowds, visit Ontario in March.

      • Lock in your flight from Pittsburgh International Airport to Ontario International Airport for August if you want to explore Ontario during its warmest month. Expect temperatures of between 16ºC (61ºF) and 36ºC (97ºF).

      • If you like cooler conditions, look for a cheap ticket from PIT to ONT in February. Average temperatures are between 4ºC (39ºF) and 24ºC (75ºF) then.

      Explore more of the United States

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

      • Around 153 kilometres south of Ontario, San Diego is another favourite stop in the United States. Start your sightseeing at San Diego Zoo, San Diego Balboa Park and USS Midway Museum.

      Plan the rest of your trip from Pittsburgh to Ontario

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