HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$145+ 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 7/5. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ONT
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$284
(United Airlines)

One-way from

$145
(American Airlines)

Popular in

January

Cheapest in

November

Average price

$416
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 ($98 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/304:30 pmPIT - ONT
1 stop7h 13mUnited Airlines
Sun 8/316:00 amONT - PIT
1 stop7h 17mUnited Airlines
Deal found 6/11$284
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/76:31 pmPIT - ONT
1 stop6h 56mDelta
Mon 8/1810:00 pmONT - PIT
1 stop8h 00mDelta
Deal found 6/10$297
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/3010:21 amPIT - ONT
2 stops11h 03mAmerican Airlines
Sun 8/319:00 amONT - PIT
2 stops9h 49mAmerican Airlines
Deal found 6/11$299
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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.
Fri 10/247:49 pmPIT - ONT
1 stop19h 48mAlaska Airlines
Mon 10/276:00 amONT - PIT
1 stop9h 34mAlaska Airlines
Deal found 6/11$332
This Frontier deal was found by Cheapflights users on 6/11. 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 8/85:40 pmPIT - ONT
1 stop9h 10mFrontier
Thu 8/1412:59 amONT - PIT
1 stop12h 46mFrontier
Deal found 6/11$341
This Trip.com deal was found by Cheapflights users on 6/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/227:40 pmPIT - ONT
1 stop19h 12mMultiple Airlines
Thu 7/36:00 amONT - PIT
1 stop8h 43mMultiple Airlines
Deal found 6/11$405
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/36:30 pmPIT - ONT
1 stop8h 25mSouthwest
Sat 7/126:00 amONT - PIT
1 stop7h 55mSouthwest
Deal found 6/11$428

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 June 12, 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

Sat 8/30

4:30 pm-8:43 pm

1 stop7h 13m

Ontario

Sun 8/31

6:00 am-4:17 pm

1 stop7h 17m

$284

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 8/7

6:31 pm-10:27 pm

1 stop6h 56m

Ontario

Mon 8/18

10:00 pm-9:00 am

1 stop8h 00m

$297

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sat 8/30

10:21 am-6:24 pm

2 stops11h 03m

Ontario

Sun 8/31

9:00 am-9:49 pm

2 stops9h 49m

$299

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Fri 10/24

7:49 pm-12:37 pm

1 stop19h 48m

Ontario

Mon 10/27

6:00 am-6:34 pm

1 stop9h 34m

$332

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Fri 8/8

5:40 pm-11:50 pm

1 stop9h 10m

Ontario

Thu 8/14

12:59 am-4:45 pm

1 stop12h 46m

$341

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 6/22

7:40 pm-11:52 am

1 stop19h 12m

Ontario

Thu 7/3

6:00 am-5:43 pm

1 stop8h 43m

$405

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 7/3

6:30 pm-11:55 pm

1 stop8h 25m

Ontario

Sat 7/12

6:00 am-4:55 pm

1 stop7h 55m

$428

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sat 7/5

5:07 am-10:01 am

1 stop7h 54m

$145

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Mon 11/17

5:30 am-9:40 am

1 stop7h 10m

$149

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 6/26

6:38 pm-11:52 am

1 stop20h 14m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 15 results
1
2

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, August is the cheapest month in which you can book a flight from Pittsburgh to Ontario (average of $246). Flying from Pittsburgh to Ontario in March is currently the most expensive (average of $328). 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 June 12, 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 12% versus a flight in the afternoon.

Rainfall in Ontario by month

Plan your trip to Ontario by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ontario ranges from 0.1 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. June is typically the driest time to visit Ontario when rainfall is around 0.1 in.

Temperature in Ontario by month

Plan your trip to Ontario by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ontario, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 53.6 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,494 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Overall

8.0

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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

    Cheapflights users have booked flights from Pittsburgh to Ontario round-trip from $284. Other airlines that can offer you cheap pricing are Delta, from $297, and American Airlines, from $299. 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 ($145), Southwest ($149), and Frontier ($180).

  • 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, August is the cheapest month in which you can book a flight from Pittsburgh to Ontario (average of $246). Flying from Pittsburgh to Ontario in March is currently the most expensive (average of $328). 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
Newark to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
John F Kennedy Intl to San Francisco flights
Newark to Las Vegas flights
Newark to San Francisco flights
LaGuardia to Los Angeles flights
Dulles Intl to Los Angeles flights
Reagan-National to Los Angeles flights
LaGuardia to Las Vegas flights
John F Kennedy Intl to Ontario flights
Newark to Burbank flights
Dulles Intl to San Francisco flights
LaGuardia to San Francisco flights
Dulles Intl to Las Vegas flights
Newark to Santa Ana flights
John F Kennedy Intl to San Diego flights
Newark to San Diego flights
Reagan-National to Las Vegas flights
Philadelphia to Las Vegas flights
Reagan-National to San Francisco flights
Newark to Ontario flights
LaGuardia to Burbank flights
Newark to Oakland flights
LaGuardia to Ontario flights
Philadelphia to San Francisco flights
Dulles Intl to San Diego flights
LaGuardia to Santa Ana flights
Reagan-National to San Diego flights
Dulles Intl to Ontario flights
Newark to San Jose flights
LaGuardia to San Diego flights
John F Kennedy Intl to Santa Ana flights
LaGuardia to Oakland flights
Philadelphia to Los Angeles flights
John F Kennedy Intl to San Jose flights
Pittsburgh to Las Vegas flights
Philadelphia to San Diego flights
Reagan-National to Ontario flights
Reagan-National to Santa Ana flights
John F Kennedy Intl to Reno flights
Newark to Sacramento flights
Dulles Intl to San Jose flights
Newark to Reno flights
John F Kennedy Intl to Long Beach flights
Philadelphia to Ontario flights
Dulles Intl to Sacramento flights
LaGuardia to San Jose flights
Dulles Intl to Santa Ana flights
John F Kennedy Intl to Sacramento 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$409FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$303Average$393FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$306Average$478FlexibilityNo cancel feeOn-time69%

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.