HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$91+ Cheap flights from Pittsburgh to Ontario (PIT - ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ONT
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pittsburgh to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Pittsburgh to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Pittsburgh (PIT) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$218
(Frontier)

One-way from

$91
(Frontier)

Popular in

January

Cheapest in

April

Average price

$472
Provider with most accurate pricing for Pittsburgh-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Pittsburgh-Ontario flights.
Search Deals
From Pittsburgh to Ontario
Search Deals
One-way flight from Pittsburgh to Ontario
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from Pittsburgh to Ontario

Cheapest flights from Pittsburgh to Ontario
Explore the most affordable flight options available from Pittsburgh to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 26, 2025.

This Frontier deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/225:07 pmPIT - ONT
1 stop9h 52mFrontier
Mon 12/296:45 amONT - PIT
1 stop6h 27mFrontier
Deal found 11/24$304
This American Airlines deal was found by Cheapflights users on 11/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:26 pmPIT - ONT
1 stop7h 20mAmerican Airlines
Thu 12/2512:55 pmONT - PIT
1 stop6h 23mAmerican Airlines
Deal found 11/25$344
This American Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/256:15 amPIT - ONT
2 stops12h 52mAmerican Airlines
Tue 12/3011:59 pmONT - PIT
1 stop7h 51mAmerican Airlines
Deal found 11/24$350
This Delta deal was found by Cheapflights users on 11/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/185:26 pmPIT - ONT
1 stop8h 38mDelta
Thu 12/2511:15 amONT - PIT
1 stop8h 35mDelta
Deal found 11/26$408
This Alaska Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:54 pmPIT - ONT
1 stop16h 56mAlaska Airlines
Tue 1/66:00 amONT - PIT
1 stop9h 58mAlaska Airlines
Deal found 11/24$411
This Alaska Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:54 pmPIT - ONT
1 stop31h 20mAlaska Airlines
Wed 1/74:03 pmONT - PIT
1 stop23h 43mAlaska Airlines
Deal found 11/24$421
This United Airlines deal was found by Cheapflights users on 11/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/164:25 pmPIT - ONT
1 stop7h 17mUnited Airlines
Wed 12/171:34 pmONT - PIT
1 stop5h 51mUnited Airlines
Deal found 11/24$451

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pittsburgh to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 26, 2025.
Use the filters below to find and compare flights from Pittsburgh to Ontario that are best for you.

Fly from

Pittsburgh

Fly to

Ontario

Route

Depart

Return

Price

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 3/4

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Wed 3/11

6:14 am-6:35 pm

1 stop9h 21m

$284

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 3/4

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Tue 3/10

12:02 pm-6:35 pm

1 stop27h 33m

$303

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 2/18

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Tue 2/24

4:02 pm-6:35 pm

1 stop23h 33m

$303

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/8

7:00 am-11:56 pm

1 stop19h 56m

Ontario

Thu 1/15

11:53 am-6:46 pm

1 stop27h 53m

$304

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/8

7:00 am-10:59 am

1 stop30h 59m

Ontario

Mon 1/12

6:00 am-6:46 pm

1 stop9h 46m

$304

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 2/5

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sat 2/7

11:53 am-6:46 pm

1 stop27h 53m

$304

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 3/5

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Wed 3/11

6:14 am-6:35 pm

1 stop9h 21m

$314

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 2/15

6:00 am-12:02 pm

1 stop9h 02m

Ontario

Fri 2/20

10:20 pm-9:47 am

1 stop8h 27m

$315

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 3/4

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Mon 3/9

6:14 am-6:35 pm

1 stop9h 21m

$315

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 1/11

7:00 am-10:59 am

1 stop30h 59m

Ontario

Sun 1/18

6:00 am-6:46 pm

1 stop9h 46m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

Showing 1-10 of 23 results
1
2
3

Compare providers for flights from Pittsburgh to Ontario

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Pittsburgh to Ontario in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Pittsburgh-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Pittsburgh-Ontario flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Pittsburgh-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Pittsburgh-Ontario flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Pittsburgh-Ontario flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Pittsburgh to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Pittsburgh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Pittsburgh to Ontario

What is the cheapest month to book a flight from Pittsburgh to Ontario?

Currently, June is the cheapest month in which you can book a flight from Pittsburgh to Ontario (average of $168). Flying from Pittsburgh to Ontario in February is currently the most expensive (average of $249). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PIT to ONT?

Find hourly flight availability from Pittsburgh to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.

When flying from Pittsburgh to Ontario, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 11% versus a flight in the afternoon.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated November 26, 2025.
Peruse reviews from past customers who have flown with Southwest, United Airlines, and American Airlines from Pittsburgh to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,046 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,038 reviews
Southwest
8.0
Very good
4,254 reviews

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Entertainment

7.5

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Pittsburgh to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Pittsburgh to Ontario?

    For as low as $284, Alaska Airlines can have you in Ontario from Pittsburgh in 31h 01m. The distance between Pittsburgh and Ontario is about 2084 mi.

  • What are the cheapest airlines flying from Pittsburgh to Ontario round-trip?

    Cheapflights users have booked flights from Pittsburgh to Ontario round-trip from $296. Other airlines that can offer you cheap pricing are Southwest, from $303, and American Airlines, from $306. United Airlines is currently priced 34% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Pittsburgh to Ontario one-way?

    The cheapest airlines for a one-way flight from Pittsburgh to Ontario are Alaska Airlines ($163), Delta ($164), and Southwest ($176).

  • Can I find deals for flights from Pittsburgh to Ontario that include hotel bookings?

    Yes. In addition to deals on Pittsburgh to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pittsburgh to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pittsburgh to Ontario.

  • Can I find deals for business class flights from Pittsburgh to Ontario?

    Yes. Cheapflights offers flight deals from Pittsburgh to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Pittsburgh to Ontario?

    Currently, June is the cheapest month in which you can book a flight from Pittsburgh to Ontario (average of $168). Flying from Pittsburgh to Ontario in February is currently the most expensive (average of $249). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Pittsburgh to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Newark to Los Angeles flights
LaGuardia to Los Angeles flights
Newark to San Francisco flights
Dulles Intl to Las Vegas flights
LaGuardia to Las Vegas flights
Reagan-National to Los Angeles flights
Dulles Intl to Los Angeles flights
John F Kennedy Intl to San Diego flights
LaGuardia to San Francisco flights
Reagan-National to Las Vegas flights
Philadelphia to Las Vegas flights
Philadelphia to Los Angeles flights
Newark to San Diego flights
Dulles Intl to San Francisco flights
LaGuardia to Burbank flights
Reagan-National to San Francisco flights
Newark to Ontario flights
John F Kennedy Intl to Ontario flights
LaGuardia to Santa Ana flights
John F Kennedy Intl to Santa Ana flights
Philadelphia to San Francisco flights
Newark to Santa Ana flights
Pittsburgh to Las Vegas flights
LaGuardia to San Diego flights
Dulles Intl to San Diego flights
LaGuardia to Ontario flights
Reagan-National to San Diego flights
Philadelphia to San Diego flights
Newark to Palm Springs flights
Reagan-National to Ontario flights
John F Kennedy Intl to San Jose flights
John F Kennedy Intl to Palm Springs flights
Philadelphia to Ontario flights
Dulles Intl to Ontario flights
Newark to San Jose flights
John F Kennedy Intl to Reno flights
John F Kennedy Intl to Burbank flights
Newark to Sacramento flights
Reagan-National to Santa Ana flights
Newark to Reno flights
John F Kennedy Intl to Sacramento flights
Pittsburgh to Los Angeles flights
LaGuardia to Palm Springs flights
Dulles Intl to Santa Ana flights
Dulles Intl to San Jose flights
LaGuardia to San Jose flights

Top 3 airlines flying from Pittsburgh to Ontario

Discover the top 3 airlines that operate flights from Pittsburgh to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$296Average$476FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$416FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$444FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.