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275 € Cheap Flights from Pittsburgh International to Ontario International

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 Airport to Ontario International Airport

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 275 €. Find the lowest prices on one-way and return tickets right here.
Ontario.275 € per passenger.Departing Wed, 29 Apr, returning Tue, 5 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Wed, 29 Apr, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 5 May, arriving in Pittsburgh International.Price includes taxes and charges.From 275 €, select.
Ontario.275 € per passenger.Departing Wed, 8 Apr, returning Tue, 14 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Wed, 8 Apr, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 14 Apr, arriving in Pittsburgh International.Price includes taxes and charges.From 275 €, select.
Ontario.275 € per passenger.Departing Tue, 2 Jun, returning Tue, 9 Jun.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Tue, 2 Jun, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 9 Jun, arriving in Pittsburgh International.Price includes taxes and charges.From 275 €, select.
Ontario.276 € per passenger.Departing Tue, 12 May, returning Sat, 16 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Tue, 12 May, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 16 May, arriving in Pittsburgh International.Price includes taxes and charges.From 276 €, select.
Ontario.353 € per passenger.Departing Thu, 30 Apr, returning Fri, 21 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Thu, 30 Apr, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 21 Aug, arriving in Pittsburgh International.Price includes taxes and charges.From 353 €, select.
Ontario.353 € per passenger.Departing Mon, 1 Jun, returning Sun, 23 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Mon, 1 Jun, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sun, 23 Aug, arriving in Pittsburgh International.Price includes taxes and charges.From 353 €, select.
Ontario.415 € per passenger.Departing Thu, 1 Oct, returning Mon, 5 Oct.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Thu, 1 Oct, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 5 Oct, arriving in Pittsburgh International.Price includes taxes and charges.From 415 €, select.
Ontario.415 € per passenger.Departing Wed, 12 Aug, returning Sat, 22 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Wed, 12 Aug, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 22 Aug, arriving in Pittsburgh International.Price includes taxes and charges.From 415 €, select.
Ontario.415 € per passenger.Departing Fri, 10 Jul, returning Tue, 14 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Fri, 10 Jul, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 14 Jul, arriving in Pittsburgh International.Price includes taxes and charges.From 415 €, select.
Ontario.415 € per passenger.Departing Tue, 1 Sep, returning Sat, 5 Sep.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Tue, 1 Sep, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 5 Sep, arriving in Pittsburgh International.Price includes taxes and charges.From 415 €, select.
Ontario.416 € per passenger.Departing Mon, 29 Jun, returning Mon, 6 Jul.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Mon, 29 Jun, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 6 Jul, arriving in Pittsburgh International.Price includes taxes and charges.From 416 €, select.
Ontario.416 € per passenger.Departing Fri, 1 May, returning Fri, 21 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Fri, 1 May, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Fri, 21 Aug, arriving in Pittsburgh International.Price includes taxes and charges.From 416 €, select.
Ontario.417 € per passenger.Departing Wed, 29 Jul, returning Mon, 3 Aug.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Wed, 29 Jul, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Mon, 3 Aug, arriving in Pittsburgh International.Price includes taxes and charges.From 417 €, select.
Ontario.451 € per passenger.Departing Sun, 29 Mar, returning Tue, 7 Apr.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Sun, 29 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 7 Apr, arriving in Pittsburgh International.Price includes taxes and charges.From 451 €, select.
Ontario.478 € per passenger.Departing Sun, 29 Mar, returning Sat, 2 May.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Sun, 29 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Sat, 2 May, arriving in Pittsburgh International.Price includes taxes and charges.From 478 €, select.
Ontario.539 € per passenger.Departing Sun, 29 Mar, returning Tue, 31 Mar.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Pittsburgh International on Sun, 29 Mar, arriving in Ontario International.Inbound indirect flight with Southwest Airlines, departs from Ontario International on Tue, 31 Mar, arriving in Pittsburgh International.Price includes taxes and charges.From 539 €, 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 April.
Mar
from 539 €
Apr
from 275 €
May
from 276 €
Jun
from 275 €
Jul
from 415 €
Aug
from 415 €
Sep
from 415 €
Oct
from 415 €
Nov
Find prices
Dec
Find prices
Jan
Find prices
Feb
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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 275 €
Search flights

San Bernardino Norton AFB

39km from central Ontario
Search flights

Santa Ana John Wayne

48km from central Ontario
from 288 €
Search flights

Long Beach Municipal

54km from central Ontario
from 430 €
Search flights

Hawthorne

65km from central Ontario
Search flights

Burbank

67km from central Ontario
from 414 €
Search flights

Los Angeles International

71km from central Ontario
Cheapest
from 215 €
Search flights

Pittsburgh to Ontario: Flight information

The things to know before you go.
Cheapest flight found275 €
Cheapest month to flyApril

Check out these Ontario hotels

Ready to plan your stay? Other travellers rate these Ontario hotels for cleanliness, service and location.
Extended Studio Hotel Ontario
3.43 km from city centre
€73
Per night
SpringHill Suites Ontario Airport/Rancho Cucamonga
6.96 km from city centre
€151
Per night
Hotel Seville - Ontario Airport/Chino
3.96 km from city centre
€66
Per night
Extended Studio Hotel Ontario
3.43 km from city centre
€73
Per night
SpringHill Suites Ontario Airport/Rancho Cucamonga
6.96 km from city centre
€151
Per night
Hotel Seville - Ontario Airport/Chino
3.96 km from city centre
€66
Per night
Explore top-rated hotels

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 275 €. 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 275 €.
As of March 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 April.
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 Wednesday, 29 April 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, Southwest Airlines offers the cheapest flight tickets to Ontario International.

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

  • Ontario's timezone is UTC-7, which makes Ontario three hours behind Pittsburgh.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you plenty of time to board your PIT to ONT flight.

  • During popular months like July, it's a good idea to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead of international flights when you fly during a peak period in general.

  • If you want to break up your flight, simply deselect 'Direct flights only' when searching for your ticket from Pittsburgh International Airport to Ontario International Airport. These are the most popular stopovers between PIT and ONT:

    • Denver International Airport

    • Harry Reid Airport (formerly McCarran Airport)

    • George Bush Intercontinental Airport

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

  • The lowest price we've seen for a one-way Pittsburgh International Airport to Ontario International Airport flight is 128 €. A return fare is currently 275 €. Depending on the availability and when you book, these fares may change.

  • Don't wait until the last moment. You're more likely to get cheap tickets from PIT to ONT if you book ahead. Airlines often offer some fantastic early bird deals.

  • Finding cheap flights from Pittsburgh International Airport to Ontario International Airport is easy if you're flexible with your trip dates. Use the 'Whole month' search tool to see the best prices across the month and score a great deal.

  • Finding cheap flights from PIT to ONT couldn't be easier with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when a new discounted fare appears.

  • Discover the right flight for you with the help of the filters. To see the 'Best,' 'Cheapest' or 'Fastest' flights from Pittsburgh International Airport to Ontario International Airport, use the 'Sort by' function. You can also filter results by arrival and departure times, airline, and number of stops.

Handy information about Pittsburgh International Airport (PIT)

  • You'll find PIT at 1000 Airport Boulevard.

  • 76.88% of flights departing from Pittsburgh International Airport reach their destination on schedule.

  • Central Pittsburgh to Pittsburgh International Airport is around 27 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're driving, catching a cab or ride-sharing.

  • Taking an early flight from Pittsburgh International Airport to Ontario International Airport? Avoid the last-minute rush to the airport (and sneak in some extra snooze time) by picking one of these stays near PIT:

Arriving at Ontario International Airport (ONT)

Getting from Ontario International Airport (ONT) to central Ontario

  • ONT is located at 2900 E. Airport Drive.

  • From Ontario International Airport, Ontario is approximately 6 kilometres away. It takes around 10 minutes to reach the centre driving.

  • Travelling to the centre by public transport will take you roughly 1 hour 30 minutes.

When to fly to Ontario International Airport (ONT)

  • August is the busiest month for flights from Pittsburgh International Airport to Ontario International Airport. To skip the crowds, head to Ontario in May.

  • Before locking in your flight from Pittsburgh International Airport to Ontario International Airport, consider the kind of weather you like. August is the warmest month in Ontario, with temperatures ranging from 15ºC (59ºF) to 35ºC (95ºF).

  • If you like cooler conditions, look for a cheap ticket from PIT to ONT in January. Temperatures average between 4ºC (39ºF) and 23ºC (73ºF) then.

Explore more of United States

  • Ontario has plenty to offer, but there are so many other parts of United States you'll want to see. Around 56 kilometres west of Ontario, a trip to Los Angeles will keep you on the move. Start with popular sights like Griffith Observatory, The Broad and La Brea Tar Pits & Museum.

  • If you want to check out another well-known destination in United States, head for San Diego, about 153 kilometres south of Ontario. San Diego Zoo, USS Midway Museum and SeaWorld San Diego are among its highlights.

Plan the rest of your trip from Pittsburgh to Ontario

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