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$61+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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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 December 18, 2025.

This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:00 pmLGA - ONT
1 stop13h 53mFrontier
Sat 1/177:15 amONT - LGA
1 stop6h 40mFrontier
Deal found 12/16$246
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:36 pmPHL - ONT
1 stop30h 23mFrontier
Wed 12/316:00 amONT - PHL
1 stop20h 40mFrontier
Deal found 12/16$252
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1710:08 pmLGA - ONT
1 stop13h 45mFrontier
Mon 1/126:00 amONT - LGA
1 stop13h 00mFrontier
Deal found 12/16$253
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/176:59 amJFK - ONT
1 stop17h 18mFrontier
Tue 12/236:17 pmONT - JFK
1 stop8h 13mFrontier
Deal found 12/16$254
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:29 pmJFK - ONT
1 stop10h 30mFrontier
Wed 1/710:45 amONT - JFK
1 stop16h 45mFrontier
Deal found 12/17$257
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:00 pmLGA - ONT
1 stop13h 53mFrontier
Wed 1/77:00 amONT - LGA
1 stop12h 00mFrontier
Deal found 12/17$257
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/314:29 pmJFK - ONT
1 stop10h 30mFrontier
Tue 1/64:04 pmONT - JFK
1 stop11h 26mFrontier
Deal found 12/17$258
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:00 pmLGA - ONT
1 stop13h 53mFrontier
Mon 1/126:00 amONT - LGA
1 stop13h 00mFrontier
Deal found 12/17$258
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:00 pmLGA - ONT
1 stop13h 53mFrontier
Thu 1/88:31 amONT - LGA
1 stop9h 34mFrontier
Deal found 12/16$278
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:36 pmPHL - ONT
1 stop30h 23mFrontier
Mon 12/296:45 amONT - PHL
1 stop19h 46mFrontier
Deal found 12/16$279
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:00 pmLGA - ONT
1 stop13h 53mFrontier
Sun 1/188:32 amONT - LGA
1 stop9h 32mFrontier
Deal found 12/16$282
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:30 amPHL - ONT
1 stop13h 00mFrontier
Tue 12/236:00 amONT - PHL
1 stop20h 40mFrontier
Deal found 12/16$283

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$147
(Trip.com)

One-way from

$61
(Trip.com)

Popular in

December

Cheapest in

July

Average price

$515
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. 18% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 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 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 December 18, 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

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 2/10

1:00 pm-9:34 pm

1 stop11h 34m

Ontario

Wed 2/11

7:30 am-9:59 pm

1 stop11h 29m

$148

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/21

6:00 pm-7:59 am

1 stop16h 59m

Ontario

Tue 2/24

7:30 am-1:15 pm

1 stop26h 45m

$149

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 1/7

6:00 pm-11:14 pm

1 stop8h 14m

Ontario

Wed 1/14

7:15 am-9:59 pm

1 stop11h 44m

$158

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 1/22

2:00 pm-12:20 am

1 stop13h 20m

Ontario

Wed 1/28

7:15 am-4:59 pm

1 stop6h 44m

$165

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 2/7

2:00 pm-11:24 pm

1 stop12h 24m

Ontario

Sat 2/14

6:00 am-9:59 pm

1 stop12h 59m

$165

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Wed 1/28

8:59 am-3:07 pm

1 stop9h 08m

Ontario

Wed 2/11

7:30 am-9:59 pm

1 stop11h 29m

$165

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 2/5

6:00 pm-12:20 am

1 stop9h 20m

Ontario

Sat 2/7

7:15 am-9:59 pm

1 stop11h 44m

$182

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Fri 1/30

2:00 pm-12:20 am

1 stop13h 20m

Ontario

Tue 2/10

7:30 am-9:59 pm

1 stop11h 29m

$200

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sat 1/10

2:00 pm-11:14 pm

1 stop12h 14m

Ontario

Tue 1/13

7:15 am-9:59 pm

1 stop11h 44m

$203

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Thu 2/19

6:00 pm-11:59 pm

1 stop8h 59m

Ontario

Wed 2/25

7:30 am-9:59 pm

1 stop11h 29m

$203

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 60 results
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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 December is currently the most expensive (average of $204). 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 December 18, 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. Saturday evenings 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 American Airlines can get you from Pennsylvania to Ontario in just under 10h. Your travel time can differ by up to 1h 34m. Pennsylvania and Ontario are separated by a distance of 2422 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 Spirit Airlines and American Airlines, with prices starting from $75 and $93, respectively.

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

    Most travelers choose Newark - Ontario, New York John F Kennedy Intl - 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 December is currently the most expensive (average of $204). 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 Pennsylvania to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$292FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$166Average$215FlexibilityNo cancel feeOn-time65%
DeltaCheapest$276Average$458FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$459FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$449FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$418FlexibilityNo cancel feeOn-time71%

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