$79 Cheap Flights from Pittsburgh (PIT) to Ontario (ONT)

View $79 flight on Fri, Jan 23, 2026Opens in a new window

Popular airlines from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)

Cheap Flights from Pittsburgh to Ontario (PIT-ONT)

Prices were available within the past 7 days and start at $79 for one-way flights and $158 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, Jan 23 - Mon, Feb 9
PIT
Pittsburgh
ONT
Ontario
$158 Roundtrip, found 9 hours ago
$158
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Pittsburgh to Ontario, returning Mon, Feb 9, priced at $158 found 9 hours ago
Frontier Airlines
Mon, Jan 26 - Mon, Feb 2
PIT
Pittsburgh
ONT
Ontario
$175 Roundtrip, found 1 day ago
$175
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Jan 26 from Pittsburgh to Ontario, returning Mon, Feb 2, priced at $175 found 1 day ago
United
Tue, Feb 3 - Wed, Feb 11
PIT
Pittsburgh
ONT
Ontario
$178 Roundtrip, found 2 days ago
$178
Roundtrip
found 2 days ago
Select United flight, departing Tue, Feb 3 from Pittsburgh to Ontario, returning Wed, Feb 11, priced at $178 found 2 days ago
American Airlines
Tue, Feb 3 - Wed, Feb 11
PIT
Pittsburgh
ONT
Ontario
$183 Roundtrip, found 2 days ago
$183
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Feb 3 from Pittsburgh to Ontario, returning Wed, Feb 11, priced at $183 found 2 days ago
American Airlines
Tue, Feb 3 - Wed, Feb 11
PIT
Pittsburgh
ONT
Ontario
$188 Roundtrip, found 2 days ago
$188
Roundtrip
found 2 days ago
Select American Airlines flight, departing Tue, Feb 3 from Pittsburgh to Ontario, returning Wed, Feb 11, priced at $188 found 2 days ago
Southwest Airlines
Tue, Feb 3 - Wed, Feb 11
PIT
Pittsburgh
ONT
Ontario
$192 Roundtrip, found 2 days ago
$192
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Feb 3 from Pittsburgh to Ontario, returning Wed, Feb 11, priced at $192 found 2 days ago
United
Thu, Jan 22 - Mon, Jan 26
PIT
Pittsburgh
ONT
Ontario
$193 Roundtrip, found 14 hours ago
$193
Roundtrip
found 14 hours ago
Select United flight, departing Thu, Jan 22 from Pittsburgh to Ontario, returning Mon, Jan 26, priced at $193 found 14 hours ago
Frontier Airlines
Mon, Jan 26 - Mon, Feb 2
PIT
Pittsburgh
ONT
Ontario
$196 Roundtrip, found 1 day ago
$196
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Jan 26 from Pittsburgh to Ontario, returning Mon, Feb 2, priced at $196 found 1 day ago
Alaska Airlines
Thu, Jan 22 - Mon, Jan 26
PIT
Pittsburgh
ONT
Ontario
$197 Roundtrip, found 14 hours ago
$197
Roundtrip
found 14 hours ago
Select Alaska Airlines flight, departing Thu, Jan 22 from Pittsburgh to Ontario, returning Mon, Jan 26, priced at $197 found 14 hours ago
Southwest Airlines
Tue, Feb 3 - Wed, Feb 11
PIT
Pittsburgh
ONT
Ontario
$201 Roundtrip, found 2 days ago
$201
Roundtrip
found 2 days ago
Select Southwest Airlines flight, departing Tue, Feb 3 from Pittsburgh to Ontario, returning Wed, Feb 11, priced at $201 found 2 days ago

Find the cheapest month to fly from Pittsburgh (PIT) to Ontario (ONT)

August is typically the cheapest month to fly

From $213 - $702 per traveler.

Alternative airports near Ontario

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to John Wayne SNA. Average driving time to city center is 42 minutes. Flights from $527
SNA
John Wayne
Average driving time to city center42 min
Flights from $527
Flights from Pittsburgh (PIT) to Ontario (ONT)
Origin airport
Pittsburgh Intl.
Destination airport
Los Angeles - Ontario Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$158
Distance
2083 mi
Average flight time
4 hours 12 mins

Pittsburgh to Ontario Flights

The cheapest times to fly from Pittsburgh to Ontario

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Pittsburgh to Ontario are during the month of January. You can find some of the cheapest flights from Pittsburgh to Ontario with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Pittsburgh to Ontario

Sunday is one of the best days to book for cheap flights from Pittsburgh to Ontario: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Pittsburgh to Ontario

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Pittsburgh to Ontario in 2026. You can also book with separate airlines for your outbound and return journeys, from $79 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Pittsburgh to Ontario flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Pittsburgh to Ontario airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT) cost?
Grab a cheap one-way flight from $79 or cheap return flight from $158 from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)?
January is the most affordable month to fly from PIT to ONT. Traveling during an off-peak travel window is often the key to finding a great deal.
What is the cheapest airline that flies from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)?
To find the cheapest airline that'll fly you from PIT to ONT, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)?
There are no daily nonstop flights departing from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT). But you can opt for flights with layovers. Filter your search on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from PIT to ONT?
Typically you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)?
Book a flight from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures later than this are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT) last-minute?
Last-minute fares from PIT to ONT are generally more expensive. For the lowest prices, start looking for flights as soon as possible. That being said, if you can play around with your travel dates, it's possible to score a cheap ticket just before your departure.
Is it cheaper to book a PIT to ONT flight and hotel package?
You can save money by securing a PIT to ONT flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After selecting your preferred accommodations and flights, you can add extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Pittsburgh Intl. Airport (PIT) to Los Angeles - Ontario Intl. Airport (ONT)?
If you booked your PIT to ONT flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more details.

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*Available to One Key members.