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$99+ Cheap flights from Ontario to Pittsburgh (ONT - PIT)

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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIT
Jan 28 — Feb 41
Wed 1/28
Wed 2/4
1 adult, Economy
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Cheap flight deals from Ontario to Pittsburgh

Cheapest flights from Ontario to Pittsburgh
Explore the most affordable flight options available from Ontario to Pittsburgh. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 29, 2025.

This Frontier deal was found by Cheapflights users on 12/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:45 amONT - PIT
1 stop6h 27mFrontier
Fri 1/25:07 pmPIT - ONT
1 stop9h 52mFrontier
Deal found 12/26$706
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/287:19 pmONT - PIT
2 stops14h 18mAlaska Airlines
Wed 1/147:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$932
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/286:00 amONT - PIT
1 stop9h 48mAlaska Airlines
Mon 1/127:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$934
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/2810:44 amONT - PIT
1 stop29h 19mAlaska Airlines
Sun 1/117:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$975
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/286:00 amONT - PIT
1 stop9h 48mAlaska Airlines
Sat 1/106:54 amPIT - ONT
2 stops16h 42mAlaska Airlines
Deal found 12/27$1,077
This Alaska Airlines deal was found by Cheapflights users on 12/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/276:00 amONT - PIT
1 stop9h 58mAlaska Airlines
Thu 1/17:54 pmPIT - ONT
1 stop31h 20mAlaska Airlines
Deal found 12/26$1,084
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/287:19 pmONT - PIT
2 stops14h 18mAlaska Airlines
Fri 1/97:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$1,102
This Alaska Airlines deal was found by Cheapflights users on 12/27. 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.
Sun 12/286:00 amONT - PIT
1 stop9h 48mAlaska Airlines
Thu 1/87:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/27$1,105
This lastminute.com deal was found by Cheapflights users on 12/28. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:44 amONT - PIT
1 stop29h 14mHawaiian Airlines
Thu 1/87:00 amPIT - ONT
1 stop11h 08mHawaiian Airlines
Deal found 12/28$1,139

Find flight deals from Ontario to Pittsburgh

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Pittsburgh (PIT). 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 December 29, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$218
(Frontier)

One-way from

$99
(Cheapflightsfares)

Popular in

February

Cheapest in

January

Average price

$448
Provider with most accurate pricing for Ontario-Pittsburgh flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Pittsburgh flights.
Search Deals
From Ontario to Pittsburgh
Search Deals
One-way flight from Ontario to Pittsburgh
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($24 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 December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Pittsburgh 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 December 29, 2025.
Use the filters below to find and compare flights from Ontario to Pittsburgh that are best for you.

Fly from

Ontario

Fly to

Pittsburgh

Route

Depart

Return

Price

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Tue 2/3

11:53 am-6:46 pm

1 stop27h 53m

Pittsburgh

Mon 2/9

7:00 am-11:56 pm

1 stop19h 56m

$294

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 2/12

6:14 am-6:35 pm

1 stop9h 21m

Pittsburgh

Wed 2/18

7:31 pm-11:32 pm

1 stop31h 01m

$294

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Sun 1/25

1:24 pm-10:56 pm

1 stop6h 32m

Pittsburgh

Sun 2/1

10:35 am-8:58 pm

2 stops13h 23m

$320

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Fri 2/6

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Sun 2/8

7:00 am-10:59 am

1 stop30h 59m

$324

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 1/22

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Mon 1/26

7:00 am-11:56 pm

1 stop19h 56m

$324

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 2/5

11:53 am-6:46 pm

1 stop27h 53m

Pittsburgh

Sun 2/8

7:00 am-10:59 am

1 stop30h 59m

$324

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Mon 2/2

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Sun 2/8

7:00 am-10:59 am

1 stop30h 59m

$324

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Fri 3/6

6:14 am-6:35 pm

1 stop9h 21m

Pittsburgh

Mon 3/9

7:31 pm-10:44 pm

1 stop30h 13m

$325

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 2/5

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Fri 2/6

7:00 am-11:56 pm

1 stop19h 56m

$349

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Wed 2/4

4:03 pm-6:46 pm

1 stop23h 43m

Pittsburgh

Wed 2/11

7:00 am-3:08 pm

1 stop11h 08m

$373

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

Showing 1-10 of 22 results
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Compare providers for flights from Ontario to Pittsburgh

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 Ontario to Pittsburgh in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Ontario-Pittsburgh flights, users find the pricing of Justfly.com to be most consistent on Cheapflights vs. Justfly.com Users can find the same prices on Ontario-Pittsburgh flight deals on Cheapflights vs. Justfly.com >95% of the time. Price accuracy is based on data collected from Ontario-Pittsburgh flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Pittsburgh flights, Cheapflights users trust Justfly.com the most. Justfly.com 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 Ontario-Pittsburgh 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 Ontario to Pittsburgh

Have a flexible travel schedule? Discover the best time to fly to Pittsburgh from Ontario 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 Ontario to Pittsburgh

How far ahead should I book a flight from Ontario to Pittsburgh?

Use this chart to determine the optimal time to book a round-trip flight from Ontario to Pittsburgh. Price data was last updated on December 26, 2025.

To ensure you get the cheapest price possible for a flight from Ontario to Pittsburgh, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, July is the cheapest month in which you can book a flight from Ontario to Pittsburgh (average of $109). Flying from Ontario to Pittsburgh in January is currently the most expensive (average of $263). 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 ONT to PIT?

Find hourly flight availability from Ontario to Pittsburgh. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 29, 2025.

One of the essential ways to save on airfare from Ontario to Pittsburgh is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 21% on airfare.

Reviews of airlines servicing Pittsburgh

Get insights into the airlines that provide service to Pittsburgh. 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 Pittsburgh. Reviews last updated December 29, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Ontario to Pittsburgh have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,252 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,014 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,120 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,072 reviews
Southwest
8.0
Very good
4,252 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Pittsburgh. 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 Ontario to Pittsburgh?

    Departing from Ontario to Pittsburgh will take you 6h 32m. The distance from Ontario to Pittsburgh is about 2084 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    United Airlines, at $286, was found to be the cheapest airline from Ontario to Pittsburgh.Alternate airlines to your destination round-trip include Delta and Southwest. United Airlines is 34% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $138. United Airlines flights start at $157 while deals on American Airlines start at $164 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Pittsburgh 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 Ontario to Pittsburgh?

    Currently, July is the cheapest month in which you can book a flight from Ontario to Pittsburgh (average of $109). Flying from Ontario to Pittsburgh in January is currently the most expensive (average of $263). 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

Traveling to a place near Pittsburgh?

Book flights to Pittsburgh if you plan to visit one of these locations
Mars
Steubenville
Washington
Monroeville
Wexford
Belle Vernon

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Alternative routes for Ontario to Pittsburgh

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Top 4 airlines flying from Ontario to Pittsburgh

Discover the top 4 airlines that operate flights from Ontario to Pittsburgh. 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 December 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$431FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$306Average$384FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$310Average$438FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$451FlexibilityNo cancel feeOn-time71%

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