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$78+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ONT
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
1 adult, Economy
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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 January 8, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$177
(Frontier)

One-way from

$78
(Frontier)

Popular in

September

Cheapest in

December

Average price

$444
Provider with most accurate pricing for Pittsburgh-Ontario flight deals.
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Provider most trusted by Cheapflights users for Pittsburgh-Ontario flights.
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From Pittsburgh to Ontario
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One-way flight from Pittsburgh to Ontario
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Highest demand for flights based on searches. 7% potential increase in price ($33 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This Frontier deal was found by Cheapflights users on 1/7. 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 1/237:59 pmPIT - ONT
1 stop7h 21mFrontier
Mon 1/266:20 amONT - PIT
1 stop9h 44mFrontier
Deal found 1/7$177
This Frontier deal was found by Cheapflights users on 1/5. 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 2/27:59 pmPIT - ONT
1 stop7h 21mFrontier
Mon 2/96:20 amONT - PIT
1 stop9h 44mFrontier
Deal found 1/5$180
This Frontier deal was found by Cheapflights users on 1/7. 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 1/307:59 pmPIT - ONT
1 stop7h 21mFrontier
Mon 2/26:20 amONT - PIT
1 stop9h 44mFrontier
Deal found 1/7$190
This Frontier deal was found by Cheapflights users on 1/8. 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 2/204:44 pmPIT - ONT
1 stop10h 15mFrontier
Fri 2/276:00 amONT - PIT
1 stop6h 19mFrontier
Deal found 1/8$210
This Frontier deal was found by Cheapflights users on 1/8. 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 2/164:14 pmPIT - ONT
1 stop10h 45mFrontier
Mon 2/236:10 amONT - PIT
1 stop6h 09mFrontier
Deal found 1/8$225
This American Airlines deal was found by Cheapflights users on 1/7. 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.
Wed 1/286:54 amPIT - ONT
1 stop8h 09mAmerican Airlines
Tue 2/312:57 pmONT - PIT
1 stop6h 40mAmerican Airlines
Deal found 1/7$235
This Southwest deal was found by Cheapflights users on 1/6. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/35:50 amPIT - ONT
1 stop7h 50mSouthwest
Tue 2/106:50 amONT - PIT
1 stop5h 55mSouthwest
Deal found 1/6$236
This Frontier deal was found by Cheapflights users on 1/8. 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 2/164:14 pmPIT - ONT
1 stop10h 45mFrontier
Fri 2/276:00 amONT - PIT
1 stop6h 19mFrontier
Deal found 1/8$245

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 January 8, 2026.
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

Tue 2/3

5:50 am-10:40 am

1 stop7h 50m

Ontario

Tue 2/10

6:50 am-3:45 pm

1 stop5h 55m

$236

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 1/28

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Mon 2/2

6:00 am-6:46 pm

1 stop9h 46m

$255

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 2/4

7:00 am-10:59 am

1 stop30h 59m

Ontario

Thu 2/12

6:14 am-6:35 pm

1 stop9h 21m

$255

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/29

7:00 am-11:56 pm

1 stop19h 56m

Ontario

Sun 2/1

6:00 am-6:46 pm

1 stop9h 46m

$265

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/29

7:00 am-11:56 pm

1 stop19h 56m

Ontario

Sat 1/31

4:03 pm-6:46 pm

1 stop23h 43m

$265

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Fri 3/6

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Tue 3/10

4:02 pm-6:35 pm

1 stop23h 33m

$284

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 2/18

11:34 am-4:19 pm

1 stop7h 45m

Ontario

Wed 2/18

11:58 pm-10:44 am

1 stop7h 46m

$287

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Mon 2/2

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Thu 2/5

6:00 am-6:46 pm

1 stop9h 46m

$287

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Tue 2/3

4:15 pm-8:58 pm

1 stop7h 43m

Ontario

Tue 2/10

5:05 am-7:01 pm

2 stops10h 56m

$288

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 3/15

7:31 pm-11:32 pm

1 stop31h 01m

Ontario

Sat 3/21

6:00 am-6:28 pm

1 stop9h 28m

$294

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 20 results
1
2

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 January.
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 $269). 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.

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 January 8, 2026.
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
4,250 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

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
4,250 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

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
9,139 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

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
11,095 reviews
Southwest
8.0
Very good
4,250 reviews

Entertainment

7.5

Food

7.0

Comfort

8.0

Crew

8.6

Overall

8.0

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.

  • What airports do I use to fly from Pittsburgh to Ontario?

    Ontario is the airport most travelers will use when flying to Ontario from Pittsburgh. Booking flights from Pittsburgh (PIT) to Ontario (ONT) should be relatively easy as there is 1 daily flight to Ontario from 3 different airlines. 6h 47m is how long a flight from Pittsburgh to Ontario will take if you book a nonstop flight.

  • How long is the flight from Pittsburgh to Ontario?

    For as low as $236, Southwest can have you in Ontario from Pittsburgh in 7h 50m. The distance between Pittsburgh and Ontario 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 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 29% 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 American Airlines ($93), United Airlines ($144), and Southwest ($166).

  • 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 $269). 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

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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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$296Average$474FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$414FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$416FlexibilityNo cancel feeOn-time71%

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