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

Atlanta (ATL) has the shortest average layover time for this route: 1h 54m.

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

Denver (DEN) was the most common stop: 44% of momondo users choosing 1-stop flights on this route connected there.

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

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

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 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 30% 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.

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 May 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.

$86 Cheap Flights from Ontario to Philadelphia in 2026

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Find the cheapest flights from Ontario to Philadelphia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

11:00 am - 7:51 pm

PHL

ONT

11h 51m

1 stop

$179Frontier

Wed, May 27 - Wed, Jun 10

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$193Frontier

Wed, May 20 - Sat, May 23

10:50 am - 5:37 am

ONT

PHL

15h 47m

1 stop

8:35 pm - 11:49 pm

PHL

ONT

30h 14m

1 stop

$205Frontier

Sat, May 23 - Tue, May 26

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$206Frontier

Wed, May 27 - Thu, May 28

6:00 am - 11:47 am

ONT

PHL

26h 47m

1 stop

12:42 pm - 11:49 pm

PHL

ONT

14h 07m

1 stop

$210Frontier

Tue, Jun 9 - Tue, Jun 23

6:00 am - 5:37 am

ONT

PHL

20h 37m

1 stop

10:40 am - 3:44 pm

PHL

ONT

8h 04m

1 stop

$212Frontier

Wed, May 20 - Tue, May 26

3:30 pm - 6:21 am

ONT

PHL

11h 51m

1 stop

10:40 am - 3:44 pm

PHL

ONT

8h 04m

1 stop

$215Frontier

Thu, May 21 - Tue, May 26

8:06 pm - 3:16 pm

ONT

PHL

16h 10m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$216Frontier

Fri, May 29 - Tue, Jun 2

10:50 am - 5:37 am

ONT

PHL

15h 47m

1 stop

8:35 pm - 11:49 pm

PHL

ONT

30h 14m

1 stop

$218Frontier

Fri, May 22 - Tue, May 26

8:06 pm - 6:16 pm

ONT

PHL

19h 10m

1 stop

8:35 pm - 10:05 am

PHL

ONT

16h 30m

1 stop

$220Frontier

Thu, May 28 - Sun, May 31

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Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets

Frontier

May 27

ONT6:00 amOntario

20h 37m

1 stop

PHL5:37 amPhiladelphia

Jun 10

PHL11:00 amPhiladelphia

11h 51m

1 stop

ONT7:51 pmOntario

$179

Frontier

May 20

ONT6:00 amOntario

20h 37m

1 stop

PHL5:37 amPhiladelphia

May 23

PHL8:35 pmPhiladelphia

16h 30m

1 stop

ONT10:05 amOntario

$193

Frontier

May 12

ONT10:50 amOntario

15h 47m

1 stop

PHL5:37 amPhiladelphia

May 23

PHL7:00 amPhiladelphia

27h 08m

1 stop

ONT7:08 amOntario

$202

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/27

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Wed 6/10

11:00 am-7:51 pm

1 stop11h 51m

$179

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/20

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Sat 5/23

8:35 pm-10:05 am

1 stop16h 30m

$193

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Sat 5/23

10:50 am-5:37 am

1 stop15h 47m

Philadelphia

Tue 5/26

8:35 pm-11:49 pm

1 stop30h 14m

$205

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/27

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Thu 5/28

8:35 pm-10:05 am

1 stop16h 30m

$206

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 6/9

6:00 am-11:47 am

1 stop26h 47m

Philadelphia

Tue 6/23

12:42 pm-11:49 pm

1 stop14h 07m

$210

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 5/20

6:00 am-5:37 am

1 stop20h 37m

Philadelphia

Tue 5/26

10:40 am-3:44 pm

1 stop8h 04m

$212

Quickest round-trip

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 5/21

3:30 pm-6:21 am

1 stop11h 51m

Philadelphia

Tue 5/26

10:40 am-3:44 pm

1 stop8h 04m

$215

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 5/29

8:06 pm-3:16 pm

1 stop16h 10m

Philadelphia

Tue 6/2

8:35 pm-10:05 am

1 stop16h 30m

$216

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 5/22

10:50 am-5:37 am

1 stop15h 47m

Philadelphia

Tue 5/26

8:35 pm-11:49 pm

1 stop30h 14m

$218

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 5/28

8:06 pm-6:16 pm

1 stop19h 10m

Philadelphia

Sun 5/31

8:35 pm-10:05 am

1 stop16h 30m

$220

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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 typical price of a round-trip flight between Ontario and Philadelphia?

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 $349, 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 $411. 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 $567.

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 at noon. momondo users have found flights departing from Ontario to Philadelphia at noon 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 from Ontario 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 $327 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of May 2026, prices for Ontario to Philadelphia flights are approximately 16% cheaper 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	7h 28m
Direct flights	None

The fastest flight from Ontario to Philadelphia takes 7h 28m

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

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Frequently asked questions about flying from Ontario to Philadelphia

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 7h 28m.
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 May 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 49% of all bookings. The subsequent popular airlines are Frontier at 23%, Delta at 14%, and Southwest at 12%.

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 5.6 2,970 reviews	Search Frontier flights
Delta	PriceFrom $282	Free Cancellation	Rating 7.9 8,460 reviews	Search Delta flights
American Airlines	PriceFrom $300	Free Cancellation	Rating 7.1 11,672 reviews	Search American Airlines flights
United Airlines	PriceFrom $333	Free Cancellation	Rating 7.4 9,681 reviews	Search United Airlines flights
Southwest	PriceFrom $356	Free Cancellation	Rating 8.0 4,312 reviews	Search Southwest flights

Wildwood

Rehoboth Beach

Cape May

Wildwood Crest

Ocean City

Cherry Hill

King of Prussia

Newark

Dewey Beach

Reading

Avalon

Dover

North Wildwood

Lewes

Stone Harbor

New Castle

Essington

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.