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$69+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ONT
Mar 6 — Mar 131
Fri 3/6
Fri 3/13
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 February 4, 2026.

This Trip.com deal was found by Cheapflights users on 2/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:00 am
DCA
-
ONT
1 stop16h 34m
Frontier
Tue 3/106:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Deal found 2/3$140
This Trip.com deal was found by Cheapflights users on 2/2. 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.
Wed 3/42:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Wed 3/116:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Deal found 2/2$142
This Trip.com deal was found by Cheapflights users on 2/1. 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.
Mon 3/26:00 pm
DCA
-
ONT
1 stop8h 59m
Frontier
Tue 3/106:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Deal found 2/1$152
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Tue 3/38:40 am
ONT
-
DCA
1 stop25h 35m
Frontier
Deal found 2/3$154
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Thu 2/266:05 am
ONT
-
DCA
1 stop7h 54m
Frontier
Deal found 2/3$158
This Mytrip deal was found by Cheapflights users on 2/2. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:00 pm
DCA
-
ONT
1 stop22h 34m
Frontier
Sat 2/286:00 am
ONT
-
DCA
1 stop7h 59m
Frontier
Deal found 2/2$164
This CheapOair deal was found by Cheapflights users on 2/2. 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.
Tue 2/248:00 am
DCA
-
ONT
1 stop16h 34m
Frontier
Sat 2/286:00 am
ONT
-
DCA
1 stop12h 59m
Frontier
Deal found 2/2$169
This Booking.com deal was found by Cheapflights users on 2/2. 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.
Mon 2/236:00 pm
DCA
-
ONT
1 stop8h 59m
Frontier
Mon 3/26:10 am
ONT
-
DCA
1 stop28h 05m
Frontier
Deal found 2/2$172
This Frontier deal was found by Cheapflights users on 2/4. 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.
Tue 3/32:00 pm
DCA
-
ONT
1 stop10h 34m
Frontier
Wed 3/186:15 am
ONT
-
DCA
1 stop12h 44m
Frontier
Deal found 2/4$174
This Mytrip deal was found by Cheapflights users on 2/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/26:00 am
PHL
-
ONT
1 stop11h 30m
Frontier
Thu 3/56:05 am
ONT
-
PHL
1 stop7h 32m
Frontier
Deal found 2/1$193
This Travelocity deal was found by Cheapflights users on 2/3. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:25 pm
PHL
-
ONT
1 stop30h 31m
Frontier
Tue 4/1412:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Deal found 2/3$200
This CheapOair deal was found by Cheapflights users on 2/3. 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.
Tue 4/78:25 pm
PHL
-
ONT
1 stop30h 31m
Frontier
Mon 4/1312:59 am
ONT
-
PHL
1 stop25h 35m
Frontier
Deal found 2/3$211

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 February 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Trip.com)

One-way from

$69
(Trip.com)

Popular in

December

Cheapest in

July

Average price

$406
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. 23% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 4, 2026.
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

Sat 3/7

2:00 pm-11:59 pm

1 stop12h 59m

Ontario

Wed 3/18

6:15 am-9:59 pm

1 stop12h 44m

$209

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Tue 4/7

6:00 pm-11:56 pm

1 stop8h 56m

Ontario

Sat 4/11

6:20 am-12:02 pm

1 stop26h 42m

$211

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Wed 3/4

4:00 pm-9:05 pm

1 stop8h 05m

Ontario

Mon 3/9

10:25 pm-8:40 am

1 stop7h 15m

$257

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Sat 4/25

4:00 pm-8:36 pm

1 stop7h 36m

Ontario

Wed 4/29

1:27 pm-1:25 am

1 stop8h 58m

$257

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Tue 3/31

6:49 pm-11:51 pm

1 stop8h 02m

Ontario

Tue 4/7

5:09 pm-5:41 am

1 stop9h 32m

$257

NewarkOntario

EWR - ONT

EWRONT

Newark

Tue 3/3

6:40 pm-11:49 pm

1 stop8h 09m

Ontario

Tue 3/17

10:25 pm-10:34 am

1 stop9h 09m

$257

Washington, D.C.Ontario

DCA - ONT

DCAONT

Washington, D.C. Reagan-National

Sun 3/8

2:00 pm-11:59 pm

1 stop12h 59m

Ontario

Wed 3/11

6:15 am-4:59 pm

1 stop7h 44m

$259

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Wed 3/4

5:00 pm-11:52 pm

1 stop9h 52m

Ontario

Sat 3/7

6:14 am-7:01 pm

1 stop9h 47m

$264

New YorkOntario

LGA - ONT

LGAONT

New York LaGuardia

Thu 3/12

4:55 pm-10:45 pm

1 stop8h 50m

Ontario

Thu 3/19

1:10 pm-11:25 pm

1 stop7h 15m

$267

New YorkOntario

JFK - ONT

JFKONT

New York John F Kennedy Intl

Fri 2/20

5:00 pm-11:52 pm

1 stop9h 52m

Ontario

Tue 2/24

6:14 am-7:10 pm

1 stop9h 56m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

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 $238). 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.

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, Delta, and United Airlines can get you from Pennsylvania to Ontario in just under 7h 36m. Your travel time can differ by up to 5h 23m. Pennsylvania and Ontario are separated by a distance of 2236 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 $93 and $148, respectively.

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

    Most travelers choose Newark - Ontario, New York John F Kennedy Intl - Ontario or Washington, D.C. Dulles Intl - 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 $238). 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

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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 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 February 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$130Average$299FlexibilityNo cancel feeOn-time62%
DeltaCheapest$208Average$467FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$296Average$459FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$303Average$444FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$306Average$405FlexibilityNo cancel feeOn-time71%

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