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$80+ 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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — PIT
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Find cheap flights from Ontario to Pittsburgh 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”

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Cheapflights Tip: The best prices from Ontario to Pittsburgh are usually found in August or September, booked 69 days in advance, depart on a Wednesday or Tuesday and return on a Friday

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 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/311:40 pmONT - PIT
1 stop6h 16mUnited Airlines
Thu 1/84:15 pmPIT - ONT
1 stop7h 43mUnited Airlines
Deal found 12/10$428
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/241:40 pmONT - PIT
1 stop6h 16mUnited Airlines
Fri 1/25:45 pmPIT - ONT
1 stop7h 40mUnited Airlines
Deal found 12/9$499
This Alaska Airlines deal was found by Cheapflights users on 12/11. 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 12/316:00 amONT - PIT
1 stop9h 58mAlaska Airlines
Thu 1/87:00 amPIT - ONT
1 stop11h 08mAlaska Airlines
Deal found 12/11$516
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/241:40 pmONT - PIT
1 stop6h 16mUnited Airlines
Sat 1/35:45 pmPIT - ONT
1 stop7h 40mUnited Airlines
Deal found 12/9$529
This Frontier deal was found by Cheapflights users on 12/10. 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.
Fri 12/196:45 amONT - PIT
1 stop6h 27mFrontier
Mon 12/225:07 pmPIT - ONT
1 stop9h 52mFrontier
Deal found 12/10$592
This Frontier deal was found by Cheapflights users on 12/11. 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.
Fri 12/266:45 amONT - PIT
1 stop6h 27mFrontier
Mon 12/295:07 pmPIT - ONT
1 stop9h 52mFrontier
Deal found 12/11$646
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Sat 12/276:39 pmONT - PIT
1 stop7h 39mUnited Airlines
Sun 1/44:15 pmPIT - ONT
1 stop7h 52mUnited Airlines
Deal found 12/10$657
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/2411:59 pmONT - PIT
2 stops11h 04mUnited Airlines
Sun 1/41:59 pmPIT - ONT
2 stops10h 08mUnited Airlines
Deal found 12/9$659

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 12, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$274
(Alaska Airlines)

One-way from

$80
(Frontier)

Popular in

February

Cheapest in

August

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. 9% potential increase in price ($44 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 12, 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

Thu 1/29

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Wed 2/4

7:00 am-8:36 pm

1 stop16h 36m

$274

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

$285

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 1/29

4:03 pm-6:46 pm

1 stop23h 43m

Pittsburgh

Sun 2/1

7:00 am-10:59 am

1 stop30h 59m

$285

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Wed 1/7

7:30 am-11:46 pm

2 stops13h 16m

Pittsburgh

Wed 1/14

6:19 am-1:56 pm

2 stops10h 37m

$291

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Tue 2/17

4:02 pm-6:35 pm

1 stop23h 33m

Pittsburgh

Fri 2/20

7:31 pm-11:32 pm

1 stop31h 01m

$304

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Wed 1/7

5:05 am-3:08 pm

1 stop7h 03m

Pittsburgh

Wed 1/14

4:15 pm-8:58 pm

1 stop7h 43m

$328

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 1/22

7:30 am-11:46 pm

2 stops13h 16m

Pittsburgh

Wed 1/28

6:00 am-11:31 am

1 stop8h 31m

$333

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Fri 1/9

1:00 pm-12:10 am

1 stop8h 10m

Pittsburgh

Tue 1/20

5:45 pm-9:45 pm

1 stop7h 00m

$336

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Fri 1/9

6:00 am-8:50 pm

2 stops11h 50m

Pittsburgh

Tue 1/20

4:15 pm-8:58 pm

1 stop7h 43m

$337

OntarioPittsburgh

ONT - PIT

ONTPIT

Ontario

Thu 1/8

6:00 am-6:46 pm

1 stop9h 46m

Pittsburgh

Mon 1/12

7:00 am-3:08 pm

1 stop11h 08m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 18 results
1
2

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 5, 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 February is currently the most expensive (average of $260). 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 12, 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 12, 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
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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
8,008 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

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 9h 46m. 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?

    Delta, at $196, was found to be the cheapest airline from Ontario to Pittsburgh.Alternate airlines to your destination round-trip include United Airlines and Southwest. Delta is 55% 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 February is currently the most expensive (average of $260). 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
Monroeville
Washington
Wexford
Belle Vernon

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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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$296Average$431FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$306Average$416FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$310Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$317Average$451FlexibilityNo cancel feeOn-time71%

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