HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$65+ 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 1/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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.

Find 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 November 3, 2025.

This CheapOair deal was found by Cheapflights users on 11/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:15 amPHL - ONT
1 stop13h 18mFrontier
Wed 12/176:15 amONT - PHL
1 stop20h 25mFrontier
Deal found 11/3$130
This CheapOair deal was found by Cheapflights users on 11/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/167:00 amPHL - ONT
1 stop10h 45mFrontier
Wed 11/198:45 amONT - PHL
1 stop17h 04mFrontier
Deal found 11/1$138
This Booking.com deal was found by Cheapflights users on 11/2. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/148:36 pmPHL - ONT
1 stop20h 49mFrontier
Wed 12/176:15 amONT - PHL
1 stop20h 25mFrontier
Deal found 11/2$140
This Trip.com deal was found by Cheapflights users on 11/2. 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 11/206:00 amPHL - ONT
1 stop8h 11mFrontier
Wed 11/2612:58 amONT - PHL
1 stop24h 47mFrontier
Deal found 11/2$198
This CheapOair deal was found by Cheapflights users on 11/3. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:15 amPHL - ONT
1 stop13h 18mFrontier
Thu 12/186:17 pmONT - PHL
1 stop8h 23mFrontier
Deal found 11/3$200
This Trip.com deal was found by Cheapflights users on 11/1. 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.
Fri 11/289:48 amPHL - ONT
1 stop14h 18mMultiple Airlines
Fri 12/53:20 pmONT - PHL
1 stop11h 11mMultiple Airlines
Deal found 11/1$203
This CheapOair deal was found by Cheapflights users on 11/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/148:36 pmPHL - ONT
1 stop20h 49mFrontier
Sat 12/206:00 amONT - PHL
1 stop20h 40mFrontier
Deal found 11/2$208
This Kiwi.com deal was found by Cheapflights users on 11/1. 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.
Sat 11/156:18 pmEWR - ONT
1 stop15h 59mMultiple Airlines
Mon 11/171:46 pmONT - EWR
2 stops26h 27mMultiple Airlines
Deal found 11/1$212
This CheapOair deal was found by Cheapflights users on 11/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:19 amPHL - ONT
1 stop7h 51mFrontier
Sun 11/166:53 amONT - PHL
1 stop18h 56mFrontier
Deal found 11/2$214
This Frontier deal was found by Cheapflights users on 10/31. 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 11/246:00 amPHL - ONT
1 stop8h 28mFrontier
Fri 12/53:20 pmONT - PHL
1 stop11h 11mFrontier
Deal found 10/31$215
This Kiwi.com deal was found by Cheapflights users on 11/2. 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.
Tue 12/210:30 pmEWR - ONT
2 stops25h 47mMultiple Airlines
Tue 12/912:30 pmONT - EWR
1 stop23h 23mMultiple Airlines
Deal found 11/2$217
This CheapOair deal was found by Cheapflights users on 11/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/156:19 amPHL - ONT
1 stop7h 51mFrontier
Sat 11/227:08 pmONT - PHL
1 stop6h 42mFrontier
Deal found 11/1$219

Cheap flight deals from Pennsylvania to Ontario

Keep the following information in mind while searching for Pennsylvania to Ontario flight deals. Data was last updated November 3, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$130
(CheapOair)

One-way from

$65
(Frontier)

Popular in

December

Cheapest in

July

Average price

$363
Provider with most accurate pricing for Philadelphia-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-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. 8% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 3, 2025.
Use the filters below to find and compare flights from Pennsylvania to Ontario that are best for you.

Fly from

Pennsylvania

Fly to

Ontario

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Wed 11/26

6:00 am-11:28 am

1 stop8h 28m

Ontario

Fri 12/5

3:20 pm-5:31 am

1 stop11h 11m

$232

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Tue 1/27

7:00 am-3:08 pm

1 stop11h 08m

Ontario

Sun 2/1

6:00 am-7:28 pm

1 stop10h 28m

$253

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Wed 2/25

4:00 pm-10:37 pm

1 stop9h 37m

Ontario

Sun 3/1

6:00 am-7:29 pm

1 stop10h 29m

$253

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Mon 2/23

4:00 pm-10:37 pm

1 stop9h 37m

Ontario

Sat 2/28

6:00 am-7:29 pm

1 stop10h 29m

$253

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Mon 1/26

4:22 pm-11:56 pm

1 stop10h 34m

Ontario

Mon 2/2

6:00 am-7:28 pm

1 stop10h 28m

$256

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Thu 1/22

4:22 pm-11:56 pm

1 stop10h 34m

Ontario

Mon 1/26

6:00 am-7:28 pm

1 stop10h 28m

$256

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Thu 12/4

7:00 am-5:08 pm

1 stop13h 08m

Ontario

Sat 12/6

5:49 pm-6:15 am

1 stop9h 26m

$257

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 12/4

6:00 am-11:02 am

1 stop8h 02m

Ontario

Sat 12/6

12:12 pm-11:41 pm

1 stop8h 29m

$257

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 12/4

6:00 am-11:02 am

1 stop8h 02m

Ontario

Mon 12/8

10:25 pm-12:06 pm

2 stops10h 41m

$262

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Thu 12/4

4:00 pm-11:29 pm

1 stop10h 29m

Ontario

Sun 12/7

6:00 am-7:29 pm

1 stop10h 29m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/1

Showing 1-10 of 60 results
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, May is the cheapest month in which you can book a flight from Pennsylvania to Ontario (average of $88). Flying from Pennsylvania to Ontario in August is currently the most expensive (average of $164). 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 PA to ONT?

Find hourly flight availability from Pennsylvania 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 November 3, 2025.

It’s optimal to fly from Pennsylvania to Ontario in the evening. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Pennsylvania to Ontario?

Use this chart to determine the cheapest time to fly round-trip from Pennsylvania to Ontario. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Pennsylvania to Ontario flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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?

    Frontier, Alaska Airlines, and Delta can get you from Pennsylvania to Ontario in just under 8h 02m. Your travel time can differ by up to 3h 06m. 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?

    $124 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Delta and United Airlines, with prices starting from $129 and $140, respectively.

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

    Most travelers choose New York John F Kennedy Intl - Ontario, Newark - Ontario or New York LaGuardia - 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, May is the cheapest month in which you can book a flight from Pennsylvania to Ontario (average of $88). Flying from Pennsylvania to Ontario in August is currently the most expensive (average of $164). 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.
John F Kennedy Intl to Los Angeles flights
John F Kennedy Intl to Las Vegas flights
Newark to Las Vegas flights
San Francisco to Los Angeles flights
John F Kennedy Intl to San Francisco flights
Seattle to Las Vegas flights
Dallas/Fort Worth to Las Vegas flights
Newark to Los Angeles flights
Seattle to Los Angeles flights
San Francisco to Las Vegas flights
O'Hare Intl to Las Vegas flights
Newark to San Francisco flights
LaGuardia to Los Angeles flights
San Francisco to Ontario flights
Dallas/Fort Worth to Los Angeles flights
Boston to Los Angeles flights
O'Hare Intl to Los Angeles flights
Dulles Intl to Las Vegas flights
Dulles Intl to Los Angeles flights
Reagan-National to Los Angeles flights
Boston to Las Vegas flights
Denver to Las Vegas flights
LaGuardia to Las Vegas flights
Seattle to Santa Ana flights
Ontario to San Francisco flights
Los Angeles to San Francisco flights
Los Angeles to Las Vegas flights
Seattle to San Diego flights
Dallas/Fort Worth to San Francisco flights
Minneapolis to Las Vegas flights
Atlanta to Las Vegas flights
O'Hare Intl to San Francisco flights
Baltimore to Los Angeles flights
Hobby to Las Vegas flights
John F Kennedy Intl to San Diego flights
San Francisco to Santa Ana flights
Reagan-National to Las Vegas flights
Seattle to Ontario flights
Baltimore to Las Vegas flights
Orlando to Las Vegas flights
Atlanta to Los Angeles flights
Santa Ana to San Francisco flights
San Jose to Las Vegas flights
LaGuardia to San Francisco flights
Portland to Los Angeles flights
Cleveland to Las Vegas flights
George Bush Intcntl to Las Vegas flights
Detroit to Las Vegas flights
Burbank to Las Vegas flights
Oakland to Las Vegas flights

Top 6 airlines flying from Pennsylvania to Ontario

Discover the top 6 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 November 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$298FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$166Average$218FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$296Average$468FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$442FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$415FlexibilityNo cancel feeOn-time71%
DeltaCheapest$306Average$470FlexibilityNo cancel feeOn-timeN/A

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.