HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$109+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
PIT — ONT
May 6 — May 131
Tue 5/6
Tue 5/13
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.

Cheapflights Tip: The best prices from Pittsburgh to Ontario are usually found in November or April, booked 41 days in advance, depart on a Friday or Tuesday and return on a Wednesday

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 May 1, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$218
(Frontier)

One-way from

$109
(Frontier)

Popular in

January

Cheapest in

November

Average price

$416
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. 14% potential increase in price ($75 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 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 May 1, 2025.

This Frontier deal was found by Cheapflights users on 4/29. 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 6/25:22 pmPIT - ONT
1 stop9h 28mFrontier
Thu 6/512:59 amONT - PIT
1 stop12h 28mFrontier
Deal found 4/29$218
This American Airlines deal was found by Cheapflights users on 4/29. 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.
Sun 5/257:28 amPIT - ONT
1 stop7h 22mAmerican Airlines
Tue 6/31:14 pmONT - PIT
1 stop6h 44mAmerican Airlines
Deal found 4/29$307
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1810:29 amPIT - ONT
2 stops14h 56mDelta
Wed 6/257:05 amONT - PIT
1 stop9h 22mDelta
Deal found 4/28$312
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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.
Thu 5/298:05 amPIT - ONT
1 stop10h 45mAlaska Airlines
Wed 6/44:45 pmONT - PIT
1 stop11h 00mAlaska Airlines
Deal found 4/29$345
This Hawaiian Airlines deal was found by Cheapflights users on 4/29. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/238:10 amPIT - ONT
1 stop8h 59mHawaiian Airlines
Fri 9/266:00 amONT - PIT
1 stop9h 42mHawaiian Airlines
Deal found 4/29$390
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/17:44 pmPIT - ONT
2 stops16h 33mMultiple Airlines
Thu 6/512:59 amONT - PIT
1 stop12h 28mMultiple Airlines
Deal found 4/29$413
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/225:45 pmPIT - ONT
1 stop8h 00mUnited Airlines
Tue 5/271:33 pmONT - PIT
1 stop6h 16mUnited Airlines
Deal found 4/30$425
This Southwest deal was found by Cheapflights users on 4/29. 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.
Sun 6/14:45 pmPIT - ONT
2 stops10h 00mSouthwest
Fri 6/610:00 amONT - PIT
2 stops8h 55mSouthwest
Deal found 4/29$438

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 May 1, 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

Mon 6/2

5:22 pm-11:50 pm

1 stop9h 28m

Ontario

Thu 6/5

12:59 am-4:27 pm

1 stop12h 28m

$218

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 5/25

7:28 am-11:50 am

1 stop7h 22m

Ontario

Tue 6/3

1:14 pm-10:58 pm

1 stop6h 44m

$307

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 6/18

10:29 am-10:25 pm

2 stops14h 56m

Ontario

Wed 6/25

7:05 am-7:27 pm

1 stop9h 22m

$312

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 5/29

8:05 am-3:50 pm

1 stop10h 45m

Ontario

Wed 6/4

4:45 pm-6:45 am

1 stop11h 00m

$345

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 6/1

7:44 pm-9:17 am

2 stops16h 33m

Ontario

Thu 6/5

12:59 am-4:27 pm

1 stop12h 28m

$413

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Thu 5/22

5:45 pm-10:45 pm

1 stop8h 00m

Ontario

Tue 5/27

1:33 pm-10:49 pm

1 stop6h 16m

$425

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Sun 6/1

4:45 pm-11:45 pm

2 stops10h 00m

Ontario

Fri 6/6

10:00 am-9:55 pm

2 stops8h 55m

$438

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 6/4

8:05 am-3:50 pm

1 stop10h 45m

Ontario

Sun 6/8

4:45 pm-6:45 am

1 stop11h 00m

$514

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Fri 5/23

5:40 pm-11:51 pm

1 stop9h 11m

$150

PittsburghOntario

PIT - ONT

PITONT

Pittsburgh

Wed 6/4

8:05 am-3:50 pm

1 stop10h 45m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/28

Showing 1-10 of 15 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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Pittsburgh-Ontario flight deals on Cheapflights vs. FlightHub >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

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

Use this chart to determine the optimal time to book a round-trip flight from Pittsburgh to Ontario. Price data was last updated on April 25, 2025.

The best time to book flights from Pittsburgh to Ontario is 41 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 May 1, 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 May 1, 2025.
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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
2,408 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Comfort

7.9

Boarding

8.1

Entertainment

7.1

Food

7.1

Crew

8.5

Overall

8.0

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 $218. Other airlines that can offer you cheap pricing are Delta, from $325, and Alaska Airlines, from $326. Frontier is currently priced 52% 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 Frontier ($109), Hawaiian Airlines ($153), and Delta ($172).

  • 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 Las Vegas flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
Newark to San Francisco flights
Newark to Los Angeles flights
LaGuardia to Los Angeles flights
LaGuardia to Las Vegas flights
Dulles Intl to Los Angeles flights
Reagan-National to Los Angeles flights
John F Kennedy Intl to Ontario flights
LaGuardia to San Francisco flights
Reagan-National to Las Vegas flights
Dulles Intl to Las Vegas flights
Dulles Intl to San Francisco flights
Philadelphia to Las Vegas flights
Reagan-National to San Francisco flights
John F Kennedy Intl to San Diego flights
Newark to Burbank flights
Newark to Ontario flights
Newark to San Diego flights
Newark to Oakland flights
Philadelphia to San Francisco flights
Newark to Santa Ana flights
LaGuardia to Burbank flights
Dulles Intl to San Diego flights
Reagan-National to San Diego flights
LaGuardia to Oakland flights
LaGuardia to Ontario flights
Dulles Intl to Ontario flights
Philadelphia to Los Angeles flights
LaGuardia to San Diego flights
John F Kennedy Intl to Santa Ana flights
Newark to San Jose flights
LaGuardia to Santa Ana flights
Newark to Sacramento flights
Pittsburgh to Las Vegas flights
John F Kennedy Intl to Sacramento flights
John F Kennedy Intl to San Jose flights
Philadelphia to Ontario flights
Philadelphia to San Diego flights
Reagan-National to Santa Ana flights
Dulles Intl to Sacramento flights
Reagan-National to Ontario flights
Philadelphia to Santa Ana flights
John F Kennedy Intl to Oakland flights
LaGuardia to San Jose flights
Philadelphia to Burbank flights
Dulles Intl to San Jose flights
John F Kennedy Intl to Palm Springs 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$268Average$472FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$303Average$387FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$306Average$505FlexibilityNo 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.