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$121+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap 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 December 18, 2025.

This Southwest deal was found by Cheapflights users on 12/14. 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.
Wed 12/246:20 pmPIT - ONT
1 stop6h 45mSouthwest
Sun 12/2812:20 pmONT - PIT
1 stop7h 45mSouthwest
Deal found 12/14$478
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/244:15 pmPIT - ONT
1 stop7h 52mUnited Airlines
Thu 1/15:05 amONT - PIT
1 stop7h 03mUnited Airlines
Deal found 12/14$510
This Southwest deal was found by Cheapflights users on 12/15. 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 12/304:40 pmPIT - ONT
1 stop9h 30mSouthwest
Wed 12/318:40 amONT - PIT
1 stop11h 55mSouthwest
Deal found 12/15$543
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/244:15 pmPIT - ONT
1 stop7h 52mUnited Airlines
Wed 12/311:40 pmONT - PIT
1 stop6h 16mUnited Airlines
Deal found 12/14$549
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/258:31 amPIT - ONT
1 stop7h 07mUnited Airlines
Tue 12/305:05 amONT - PIT
1 stop7h 03mUnited Airlines
Deal found 12/16$569
This Frontier deal was found by Cheapflights users on 12/14. 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 12/195:07 pmPIT - ONT
1 stop9h 52mFrontier
Mon 12/296:45 amONT - PIT
1 stop6h 27mFrontier
Deal found 12/14$592
This United Airlines deal was found by Cheapflights users on 12/14. 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 12/244:15 pmPIT - ONT
1 stop7h 52mUnited Airlines
Sun 1/46:39 pmONT - PIT
1 stop7h 39mUnited Airlines
Deal found 12/14$638
This Delta deal was found by Cheapflights users on 12/17. 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.
Wed 12/175:10 pmPIT - ONT
2 stops22h 24mDelta
Thu 12/2511:15 amONT - PIT
1 stop8h 35mDelta
Deal found 12/17$649

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$182
(Frontier)

One-way from

$121
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$690
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. 18% potential increase in price ($102 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($22 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 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 December 18, 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

Fri 1/30

7:59 pm-12:20 am

1 stop7h 21m

Ontario

Mon 2/2

6:20 am-7:04 pm

1 stop9h 44m

$217

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 1/21

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sun 1/25

6:00 am-6:46 pm

1 stop9h 46m

$274

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/8

3:02 pm-9:05 pm

1 stop9h 03m

Ontario

Sat 1/17

6:00 am-4:42 pm

1 stop7h 42m

$308

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Tue 2/17

5:40 am-10:40 am

1 stop8h 00m

Ontario

Tue 2/24

6:30 am-4:20 pm

1 stop6h 50m

$313

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Tue 3/10

6:00 am-11:35 am

1 stop8h 35m

Ontario

Wed 3/11

6:00 am-4:35 pm

1 stop7h 35m

$313

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Tue 1/6

5:32 pm-10:38 pm

1 stop8h 06m

Ontario

Wed 1/14

12:41 pm-10:56 pm

1 stop7h 15m

$313

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/8

3:02 pm-9:05 pm

1 stop9h 03m

Ontario

Tue 1/13

10:30 pm-9:49 am

1 stop8h 19m

$314

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 1/7

6:00 am-11:31 am

1 stop8h 31m

Ontario

Tue 1/13

10:30 pm-12:24 pm

2 stops10h 54m

$318

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Tue 1/6

5:32 pm-10:38 pm

1 stop8h 06m

Ontario

Tue 1/13

10:30 pm-12:24 pm

2 stops10h 54m

$318

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 1/8

11:15 am-9:05 pm

2 stops12h 50m

Ontario

Wed 1/14

12:41 pm-10:56 pm

1 stop7h 15m

$319

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 22 results
1
2
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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 December.
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 $270). 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 December 18, 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 December 18, 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
7.9
Good
4,250 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

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
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

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
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Boarding

8.1

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Overall

7.9

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 $217, Frontier can have you in Ontario from Pittsburgh in 7h 21m. 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 35% 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 Delta ($148).

  • 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 $270). 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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Alternative routes for Pittsburgh to Ontario

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$296Average$476FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$416FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$444FlexibilityNo cancel feeOn-time71%

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