Which airport is the most popular layover for flights between Ontario and Philadelphia?

Atlanta (ATL) was the most common stop: 38% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Philadelphia?

American Airlines, JetBlue and United Airlines are the top three most popular airlines that fly to Philadelphia from Ontario according to our data. American Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 10 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Ontario to Philadelphia?

Flights connecting via Nashville (BNA) have the shortest average one-way travel time: 7h 20m.

What is the cheapest airline that flies from Ontario to Philadelphia?

Delta, Alaska Airlines, and United Airlines are the most popular carriers operating from Ontario to Philadelphia

Which layover airport offers the lowest fares from Ontario to Philadelphia?

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $237.

Which layover airport has the shortest connection time from Ontario to Philadelphia?

Atlanta (ATL) has the shortest average layover time for this route: 1h 39m.

When did momondo last update prices for flights from Ontario Airport to Philadelphia Airport?

Prices for flights from Ontario Airport to Philadelphia Airport are updated daily.

How many operators does momondo search for flights from Ontario Airport to Philadelphia Airport?

As of March 2026, there are 5 operators available to choose from for flights from Ontario Airport to Philadelphia Airport.

How old do you have to be to fly from Ontario Airport to Philadelphia Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Philadelphia Airport.

What documentation or ID do you need to fly to Philadelphia Airport?

The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$79 Cheap Flights from Ontario to Philadelphia in 2026

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Find the cheapest flights from Ontario to Philadelphia

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

7:44 pm - 6:50 am

ONT

PHL

8h 06m

1 stop

8:00 am - 6:49 pm

PHL

ONT

13h 49m

1 stop

$160Frontier

Tue, Apr 21 - Wed, Apr 29

12:59 am - 5:35 am

ONT

PHL

25h 36m

1 stop

8:41 pm - 7:26 am

PHL

ONT

13h 45m

1 stop

$161Frontier

Fri, Apr 24 - Sat, May 2

12:59 am - 5:35 am

ONT

PHL

25h 36m

1 stop

8:41 pm - 7:26 am

PHL

ONT

13h 45m

1 stop

$162Frontier

Fri, Apr 24 - Sat, May 2

7:44 pm - 6:50 am

ONT

PHL

8h 06m

1 stop

8:36 pm - 11:55 pm

PHL

ONT

30h 19m

1 stop

$167Frontier

Tue, Apr 21 - Tue, Apr 28

12:59 am - 5:35 am

ONT

PHL

25h 36m

1 stop

8:00 am - 8:24 am

PHL

ONT

27h 24m

1 stop

$171Frontier

Fri, Apr 24 - Wed, Apr 29

12:59 am - 5:34 am

ONT

PHL

25h 35m

1 stop

8:41 pm - 11:55 pm

PHL

ONT

30h 14m

1 stop

$172Frontier

Wed, Apr 15 - Mon, Apr 20

7:44 pm - 6:50 am

ONT

PHL

8h 06m

1 stop

8:00 am - 6:49 pm

PHL

ONT

13h 49m

1 stop

$185Frontier

Tue, Apr 14 - Sat, May 2

6:20 am - 5:31 am

ONT

PHL

20h 11m

1 stop

8:36 pm - 11:55 pm

PHL

ONT

30h 19m

1 stop

$191Frontier

Thu, Apr 9 - Fri, Apr 17

5:12 pm - 5:34 am

ONT

PHL

9h 22m

1 stop

7:00 am - 7:35 am

PHL

ONT

27h 35m

1 stop

$192Frontier

Sun, May 3 - Sat, May 9

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$196Frontier

Thu, May 7 - Tue, May 19

Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets

Frontier

Apr 21

ONT7:44 pmOntario

8h 06m

1 stop

PHL6:50 amPhiladelphia

Apr 29

PHL8:00 amPhiladelphia

13h 49m

1 stop

ONT6:49 pmOntario

$160

Frontier

Apr 24

ONT12:59 amOntario

25h 36m

1 stop

PHL5:35 amPhiladelphia

May 2

PHL8:41 pmPhiladelphia

13h 45m

1 stop

ONT7:26 amOntario

$161

Frontier

Apr 24

ONT12:59 amOntario

25h 36m

1 stop

PHL5:35 amPhiladelphia

May 2

PHL8:41 pmPhiladelphia

13h 45m

1 stop

ONT7:26 amOntario

$162

American Airlines flights from Ontario to Philadelphia

Our best American Airlines deals on Ontario to Philadelphia flight tickets

American Airlines

Apr 5

ONT11:58 pmOntario

6h 42m

1 stop

PHL9:40 amPhiladelphia

Apr 14

PHL5:00 amPhiladelphia

9h 34m

2 stops

ONT11:34 amOntario

$472

American Airlines

Apr 5

ONT11:58 pmOntario

6h 42m

1 stop

PHL9:40 amPhiladelphia

Apr 14

PHL11:50 amPhiladelphia

9h 34m

2 stops

ONT6:24 pmOntario

$492

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 4/21

7:44 pm-6:50 am

1 stop8h 06m

Philadelphia

Wed 4/29

8:00 am-6:49 pm

1 stop13h 49m

$160

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/24

12:59 am-5:35 am

1 stop25h 36m

Philadelphia

Sat 5/2

8:41 pm-7:26 am

1 stop13h 45m

$161

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/24

12:59 am-5:35 am

1 stop25h 36m

Philadelphia

Sat 5/2

8:41 pm-7:26 am

1 stop13h 45m

$162

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 4/21

7:44 pm-6:50 am

1 stop8h 06m

Philadelphia

Tue 4/28

8:36 pm-11:55 pm

1 stop30h 19m

$167

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 4/24

12:59 am-5:35 am

1 stop25h 36m

Philadelphia

Wed 4/29

8:00 am-8:24 am

1 stop27h 24m

$171

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 4/15

12:59 am-5:34 am

1 stop25h 35m

Philadelphia

Mon 4/20

8:41 pm-11:55 pm

1 stop30h 14m

$172

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 4/14

7:44 pm-6:50 am

1 stop8h 06m

Philadelphia

Sat 5/2

8:00 am-6:49 pm

1 stop13h 49m

$185

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 4/9

6:20 am-5:31 am

1 stop20h 11m

Philadelphia

Fri 4/17

8:36 pm-11:55 pm

1 stop30h 19m

$191

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sun 5/3

5:12 pm-5:34 am

1 stop9h 22m

Philadelphia

Sat 5/9

7:00 am-7:35 am

1 stop27h 35m

$192

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 5/7

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Tue 5/19

8:35 pm-10:05 am

1 stop16h 30m

$196

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Philadelphia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Ontario is in May. Flight prices, which tend to average around $338, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Philadelphia, with average flight prices from Ontario averaging around $353.

What is the cheapest day to depart on your flight to Philadelphia?

The cheapest day to depart from Ontario to Philadelphia is on a Saturday. Travelers who choose to depart for Philadelphia on a Saturday will often find tickets for as low as $395. On the other hand, Sunday is the most expensive day to depart from Ontario because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $557.

What is the cheapest time of day to depart on your flight to Philadelphia?

According to our data, the cheapest time of day to fly to Philadelphia is in the evening. momondo users have found flights departing from Ontario to Philadelphia in the evening for as low as $364. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $502.

How far in advance should I book a flight to Philadelphia?

You are more likely to see cheaper flights to Philadelphia from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around $425 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from Ontario for as low as $331 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of March 2026, prices for Ontario to Philadelphia flights are approximately 39% more expensive when compared to flights at the same time last year.

When to book flights from Ontario to Philadelphia

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Philadelphia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Ontario to Philadelphia (ONT to PHL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Philadelphia

Fastest flight time	6h 52m
Direct flights	None

The fastest flight from Ontario to Philadelphia takes 6h 52m

There are no direct flights from Ontario to Philadelphia. There are no popular flight routes from Ontario to Philadelphia.

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How far is Ontario to Philadelphia by plane?
The distance between Ontario and Philadelphia is about 2355.5 mi. In terms of flight time, this usually takes a little over 6h 52m.
When did momondo last update prices for flights from Ontario Airport to Philadelphia Airport?
Prices for flights from Ontario Airport to Philadelphia Airport are updated daily.
How many operators does momondo search for flights from Ontario Airport to Philadelphia Airport?
As of March 2026, there are 5 operators available to choose from for flights from Ontario Airport to Philadelphia Airport.
How old do you have to be to fly from Ontario Airport to Philadelphia Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Philadelphia Airport.
What documentation or ID do you need to fly to Philadelphia Airport?
The travel and health documents you'll need for your trip to Philadelphia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Philadelphia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Ontario to Philadelphia?
momondo data reveals that the most frequently booked airline on the route from Ontario to Philadelphia is American Airlines, representing 47% of all bookings. The subsequent popular airlines are Frontier at 22%, Delta at 14%, and Southwest at 13%.

Best airlines flying from Ontario to Philadelphia

Compare and see reviews for airlines that fly from Ontario to Philadelphia with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $157	Free Cancellation	Rating 5.7 3,018 reviews	Search Frontier flights
Delta	PriceFrom $296	Free Cancellation	Rating 7.9 8,314 reviews	Search Delta flights
American Airlines	PriceFrom $300	Free Cancellation	Rating 7.1 11,488 reviews	Search American Airlines flights
United Airlines	PriceFrom $333	Free Cancellation	Rating 7.4 9,455 reviews	Search United Airlines flights
Southwest	PriceFrom $358	Free Cancellation	Rating 8.0 4,324 reviews	Search Southwest flights

Wildwood

Cape May

Rehoboth Beach

Wildwood Crest

Ocean City

Cherry Hill

King of Prussia

Newark

Dewey Beach

Reading

Avalon

North Wildwood

Dover

Lewes

Stone Harbor

Essington

New Castle

Vineland

Pottstown

Somers Point

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Philadelphia?

It is quick and easy to find Ontario to Philadelphia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Philadelphia that suits you.

Can I find flights from Ontario to Philadelphia with flexible booking policies on momondo?

All flight searches from Ontario to Philadelphia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Ontario to Philadelphia?

momondo provides multiple filters to help you find the best flight to Philadelphia from Ontario. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ontario to Philadelphia right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Philadelphia flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.