HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$98+ Cheap flights from Pennsylvania to Ontario (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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pennsylvania 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 Pennsylvania to Ontario

Cheapest flights from Pennsylvania to Ontario
Explore the most affordable flight options available from Pennsylvania to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 27, 2026.

This Kiwi.com deal was found by Cheapflights users on 7/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:00 am
PHL
-
ONT
1 stop11h 37m
Frontier
Tue 9/292:55 pm
ONT
-
PHL
2 stops24h 20m
Frontier
Deal found 7/22$234
This Frontier deal was found by Cheapflights users on 7/22. 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.
Sun 9/136:00 am
PHL
-
ONT
1 stop11h 37m
Frontier
Mon 10/52:55 pm
ONT
-
PHL
1 stop11h 41m
Frontier
Deal found 7/22$240
This Frontier deal was found by Cheapflights users on 7/27. 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.
Thu 9/241:30 pm
EWR
-
ONT
1 stop8h 09m
Frontier
Thu 10/17:46 pm
ONT
-
EWR
1 stop13h 49m
Frontier
Deal found 7/27$240
This Frontier deal was found by Cheapflights users on 7/22. 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.
Sat 8/228:37 pm
PHL
-
ONT
1 stop16h 27m
Frontier
Sat 8/2911:50 am
ONT
-
PHL
1 stop15h 40m
Frontier
Deal found 7/22$241
This Frontier deal was found by Cheapflights users on 7/22. 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.
Thu 8/207:00 am
PHL
-
ONT
1 stop12h 22m
Frontier
Tue 8/253:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/22$242
This Frontier deal was found by Cheapflights users on 7/26. 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.
Sat 8/298:00 am
PHL
-
ONT
1 stop10h 54m
Frontier
Sat 9/53:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/26$246
This Frontier deal was found by Cheapflights users on 7/26. 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.
Thu 9/37:00 am
PHL
-
ONT
1 stop12h 22m
Frontier
Tue 9/83:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/26$248
This Frontier deal was found by Cheapflights users on 7/26. 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.
Thu 8/207:00 am
PHL
-
ONT
1 stop12h 22m
Frontier
Thu 8/273:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/26$252
This Frontier deal was found by Cheapflights users on 7/23. 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 8/1411:06 am
PHL
-
ONT
1 stop7h 48m
Frontier
Wed 8/193:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/23$253
This Frontier deal was found by Cheapflights users on 7/23. 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.
Thu 8/1311:06 am
PHL
-
ONT
1 stop7h 48m
Frontier
Thu 8/203:40 pm
ONT
-
PHL
1 stop11h 50m
Frontier
Deal found 7/23$254
This Trip.com deal was found by Cheapflights users on 7/23. 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.
Thu 9/1010:55 pm
LGA
-
ONT
1 stop11h 17m
Frontier
Mon 9/148:07 am
ONT
-
LGA
1 stop10h 53m
Frontier
Deal found 7/23$272
This Trip.com deal was found by Cheapflights users on 7/26. 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.
Tue 8/2510:55 pm
LGA
-
ONT
1 stop12h 41m
Frontier
Tue 9/19:37 am
ONT
-
LGA
1 stop9h 23m
Frontier
Deal found 7/26$277

Find flight deals from Pennsylvania to Ontario

Keep the following information in mind while searching for Pennsylvania to Ontario flight deals. Data was last updated July 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$234
(Kiwi.com)

One-way from

$98
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$498
Provider with most accurate pricing for Philadelphia-Los Angeles Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Los Angeles Los Angeles flights.
Search Deals
From Pennsylvania to Ontario
Search Deals
One-way flight from Pennsylvania to Ontario
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($29 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania 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 July 27, 2026.
Use the filters below to find and compare flights from Pennsylvania to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 9/23

6:55 am-2:25 pm

1 stop10h 30m

Ontario

Sat 9/26

11:55 am-10:20 pm

1 stop7h 25m

$287

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 8/21

5:25 pm-10:35 pm

1 stop8h 10m

Ontario

Tue 9/1

9:15 am-9:57 pm

1 stop9h 42m

$287

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Fri 1/22

4:00 pm-10:43 pm

1 stop9h 43m

Ontario

Sat 1/30

7:00 am-5:54 pm

1 stop7h 54m

$287

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 9/16

11:25 am-7:00 pm

1 stop10h 35m

Ontario

Sat 9/19

9:25 am-9:45 pm

2 stops9h 20m

$292

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Fri 9/11

8:30 am-3:05 pm

2 stops9h 35m

Ontario

Mon 9/14

8:10 am-8:55 pm

1 stop9h 45m

$292

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 10/8

6:55 am-2:25 pm

1 stop10h 30m

Ontario

Thu 10/15

12:40 pm-10:55 pm

1 stop7h 15m

$322

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Thu 9/24

5:25 am-10:20 am

1 stop7h 55m

Ontario

Thu 9/24

2:00 pm-11:50 pm

1 stop6h 50m

$329
Quickest round-trip

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Sat 9/19

5:59 pm-8:57 pm

Nonstop5h 58m

Ontario

Mon 10/5

10:42 pm-7:00 am

Nonstop5h 18m

$347

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Thu 9/17

6:42 am-12:12 pm

1 stop8h 30m

Ontario

Mon 9/21

1:56 pm-12:57 am

1 stop8h 01m

$347

AllentownOntario

ABE - ONT

ABEONT

Allentown-Bethlehem

Sat 10/17

6:30 am-11:08 am

1 stop7h 38m

Ontario

Sat 10/24

12:18 pm-10:29 pm

1 stop7h 11m

$347

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Pennsylvania to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Pennsylvania 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 Pennsylvania to Ontario

What is the cheapest month to book a flight from Pennsylvania to Ontario?

Currently, September is the cheapest month in which you can book a flight from Pennsylvania to Ontario (average of $342). Flying from Pennsylvania to Ontario in June is currently the most expensive (average of $481). 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.

Weekly flight availability from Pennsylvania to Ontario

Explore weekly flight availability from Pennsylvania to Ontario. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 27, 2026.

The most flights from USPA to ONT are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

How much does it cost to fly round-trip from Pennsylvania to Ontario?

Airfare is below average for this route at the moment.
Pennsylvania to Ontario flights typically cost between $298 and $416 in September.
The cheapest round-trip price found within the last 5 days was $234 on Frontier (Sep 24-Sep 29).

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

To ensure you get the cheapest price possible for a flight from Pennsylvania to Ontario, you should look to book at least 55 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.

Related info for your journey

Find useful and relevant information for your journey from Pennsylvania to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Ontario from Pennsylvania?

    Ontario (ONT) is the airport you will fly into if you book a flight from Pennsylvania to Ontario. It is only a 3.1 mi journey from Ontario (ONT) to Ontario’s city center.

  • How long is the flight from Pennsylvania to Ontario?

    Southwest, United Airlines, and Delta can get you from Pennsylvania to Ontario in just under 8h 10m. Your travel time can differ by up to 2h 20m. Pennsylvania and Ontario are separated by a distance of 2417 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Pennsylvania to Ontario one-way?

    $72 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $131 and $148, respectively.

  • What are the most popular routes from Pennsylvania to Ontario?

    Most travelers choose New York John F Kennedy Intl - Ontario, New York LaGuardia - Ontario or Newark - Ontario when deciding on the best route from Pennsylvania to Ontario.

  • Can I find deals for flights from Pennsylvania to Ontario that include hotel bookings?

    Yes. In addition to deals on Pennsylvania to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pennsylvania to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pennsylvania to Ontario.

  • Can I find deals for business class flights from Pennsylvania to Ontario?

    Yes. Cheapflights offers flight deals from Pennsylvania 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 Pennsylvania to Ontario?

    Currently, September is the cheapest month in which you can book a flight from Pennsylvania to Ontario (average of $342). Flying from Pennsylvania to Ontario in June is currently the most expensive (average of $481). 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 Pennsylvania to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Newark to San Francisco flights
John F Kennedy Intl to San Francisco flights
LaGuardia to San Francisco flights
John F Kennedy Intl to Los Angeles flights
Newark to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
Seattle to Los Angeles flights
Dallas/Fort Worth to Los Angeles flights
San Francisco to Las Vegas flights
Hobby to Las Vegas flights
Seattle to Las Vegas flights
Los Angeles to Las Vegas flights
Stewart to San Francisco flights
Dallas/Fort Worth to Las Vegas flights
O'Hare Intl to Los Angeles flights
Atlanta to Las Vegas flights
O'Hare Intl to Las Vegas flights
LaGuardia to Los Angeles flights
George Bush Intcntl to Las Vegas flights
Detroit to Las Vegas flights
Dulles Intl to Las Vegas flights
Dallas/Fort Worth to San Francisco flights
Reagan-National to Los Angeles flights
Los Angeles to San Francisco flights
Seattle to Ontario flights
John F Kennedy Intl to Ontario flights
Denver to Las Vegas flights
Baltimore to Los Angeles flights
San Francisco to Los Angeles flights
Hobby to Los Angeles flights
Boston to Las Vegas flights
San Francisco to Santa Ana flights
LaGuardia to Las Vegas flights
Baltimore to Las Vegas flights
Atlanta to Los Angeles flights
Santa Ana to Las Vegas flights
San Francisco to Ontario flights
Seattle to San Francisco flights
Reagan-National to Las Vegas flights
Ontario to Las Vegas flights
Ontario to San Francisco flights
San Jose to Las Vegas flights
Boston to Los Angeles flights
Orlando to Las Vegas flights
Santa Ana to San Francisco flights
Boston to San Francisco flights
Austin to Las Vegas flights
Dallas/Fort Worth to San Diego flights
O'Hare Intl to Ontario flights

Top 5 airlines flying from Pennsylvania to Ontario

Discover the top 5 airlines that operate flights from Pennsylvania 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 July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$215Average$373FlexibilityNo cancel feeOn-time62%
DeltaCheapest$256Average$474FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$290Average$484FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$305Average$475FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$305Average$496FlexibilityNo cancel feeOn-time71%

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.
Site
©2026 Cheapflights