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

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 28m.

What airlines fly to Ontario?

American Airlines, United Airlines and Delta are the top three most popular airlines that fly to Ontario from Philadelphia according to our data. American Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Ontario. Keep in mind that there are 10 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Salt Lake City (SLC) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

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

Phoenix (PHX) has the shortest average layover time for this route: 0h 59m.

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

Flights via Dallas (DFW) offer the lowest average round-trip price of $264.

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

Frontier, Delta, and American Airlines are the most popular carriers operating from Philadelphia to Ontario

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

Prices for flights from Philadelphia Airport to Ontario Airport refresh daily.

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

As of October 2025, there are 6 operators available to choose from for flights from Philadelphia Airport to Ontario Airport.

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

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

The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$65 Cheap Flights from Philadelphia to Ontario in 2025/26

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6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

6:53 am - 4:49 amONT-PHL

18h 56m1 stop

$144Frontier

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Thu, Nov 13 - Sun, Nov 16

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

12:05 pm - 4:49 amONT-PHL

13h 44m1 stop

$176Frontier

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Mon, Nov 10 - Thu, Nov 13

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

12:23 pm - 4:45 amONT-PHL

13h 22m1 stop

$206Frontier

Find Deal

Sat, Nov 15 - Thu, Nov 20

5:40 am - 11:54 amPHL-ONT

9h 14m1 stop

1:00 pm - 12:22 amONT-PHL

8h 22m1 stop

$303Delta

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Wed, Feb 11 - Sat, Feb 14

5:40 am - 11:54 amPHL-ONT

9h 14m1 stop

10:30 pm - 12:04 pmONT-PHL

10h 34m2 stops

$308Delta

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Wed, Feb 11 - Sat, Feb 14

1:59 pm - 6:19 pmPHL-ONT

7h 20m1 stop

9:59 am - 7:50 pmONT-PHL

6h 51m1 stop

$318American Airlines

Find Deal

Thu, Dec 4 - Wed, Dec 10

7:05 am - 12:03 pmPHL-ONT

7h 58m1 stop

4:47 pm - 5:27 amONT-PHL

9h 40m1 stop

$323American Airlines

Find Deal

Tue, Nov 18 - Mon, Nov 24

6:00 am - 11:28 amPHL-ONT

8h 28m1 stop

6:00 am - 5:53 pmONT-PHL

8h 53m1 stop

$339Multiple Airlines

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Wed, Nov 26 - Sat, Dec 6

10:06 am - 8:50 pmPHL-ONT

13h 44m2 stops

8:55 pm - 10:24 amONT-PHL

10h 29m2 stops

$346United Airlines

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Sat, Feb 21 - Mon, Feb 23

12:55 pm - 10:57 pmPHL-ONT

13h 02m2 stops

5:00 am - 5:14 pmONT-PHL

9h 14m2 stops

$348United Airlines

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Sun, Feb 15 - Wed, Feb 18

Frontier flights from Philadelphia to Ontario

Our best Frontier deals on Philadelphia to Ontario flight tickets

Frontier

Nov 13

PHL6:19 amPhiladelphia

7h 51m

1 stop

ONT11:10 amOntario

Nov 16

ONT6:53 amOntario

18h 56m

1 stop

PHL4:49 amPhiladelphia

$144

Find similar

Frontier

Nov 10

PHL6:19 amPhiladelphia

7h 51m

1 stop

ONT11:10 amOntario

Nov 13

ONT12:05 pmOntario

13h 44m

1 stop

PHL4:49 amPhiladelphia

$176

Find similar

Frontier

Nov 8

PHL6:19 amPhiladelphia

7h 51m

1 stop

ONT11:10 amOntario

Nov 13

ONT12:05 pmOntario

13h 44m

1 stop

PHL4:49 amPhiladelphia

$196

Find similar

United Airlines flights from Philadelphia to Ontario

Our best United Airlines deals on Philadelphia to Ontario flight tickets

United Airlines

Feb 21

PHL10:06 amPhiladelphia

13h 44m

2 stops

ONT8:50 pmOntario

Feb 23

ONT8:55 pmOntario

10h 29m

2 stops

PHL10:24 amPhiladelphia

$346

Find similar

United Airlines

Feb 15

PHL12:55 pmPhiladelphia

13h 02m

2 stops

ONT10:57 pmOntario

Feb 18

ONT5:00 amOntario

9h 14m

2 stops

PHL5:14 pmPhiladelphia

$348

Find similar

United Airlines

Nov 4

PHL6:25 pmPhiladelphia

21h 12m

1 stop

ONT12:37 pmOntario

Dec 1

ONT7:00 amOntario

7h 29m

1 stop

PHL5:29 pmPhiladelphia

$656

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Fly from

Fly to

Route

Depart

Return

Price

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Thu 11/13

6:19 am-11:10 am

1 stop7h 51m

Ontario

Sun 11/16

6:53 am-4:49 am

1 stop18h 56m

$144

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Mon 11/10

6:19 am-11:10 am

1 stop7h 51m

Ontario

Thu 11/13

12:05 pm-4:49 am

1 stop13h 44m

$176

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Sat 11/15

6:19 am-11:10 am

1 stop7h 51m

Ontario

Thu 11/20

12:23 pm-4:45 am

1 stop13h 22m

$206

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Wed 2/11

5:40 am-11:54 am

1 stop9h 14m

Ontario

Sat 2/14

1:00 pm-12:22 am

1 stop8h 22m

$303

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Wed 2/11

5:40 am-11:54 am

1 stop9h 14m

Ontario

Sat 2/14

10:30 pm-12:04 pm

2 stops10h 34m

$308

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Thu 12/4

1:59 pm-6:19 pm

1 stop7h 20m

Ontario

Wed 12/10

9:59 am-7:50 pm

1 stop6h 51m

$318

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Tue 11/18

7:05 am-12:03 pm

1 stop7h 58m

Ontario

Mon 11/24

4:47 pm-5:27 am

1 stop9h 40m

$323

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Wed 11/26

6:00 am-11:28 am

1 stop8h 28m

Ontario

Sat 12/6

6:00 am-5:53 pm

1 stop8h 53m

$339

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Sat 2/21

10:06 am-8:50 pm

2 stops13h 44m

Ontario

Mon 2/23

8:55 pm-10:24 am

2 stops10h 29m

$346

PhiladelphiaOntario

PHL - ONT

PHLONT

Philadelphia

Sun 2/15

12:55 pm-10:57 pm

2 stops13h 02m

Ontario

Wed 2/18

5:00 am-5:14 pm

2 stops9h 14m

$348

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How to get the cheapest flight ticket from Philadelphia to Ontario

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 Ontario?

In general, March is the cheapest month to fly from Philadelphia to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $342. If you aren’t able to travel during the month of March, then book flights to Ontario from Philadelphia during May instead. Flights to Ontario in May, while not as cheap as those in March, still average around $355.

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

The cheapest day to depart on your flight to Ontario is on a Monday when prices can be found for as low as $330. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Philadelphia to Ontario for around $416.

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

In the evening is the cheapest time of day to fly from Philadelphia to Ontario when you can find flight prices for as low as $293. Flying to Ontario in the evening is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $386 on average. Flights to Ontario from Philadelphia in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Ontario from Philadelphia when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $409 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Philadelphia for as low as $307 on momondo.

How have Philadelphia to Ontario flight prices changed over time?

As of October 2025, prices for Philadelphia to Ontario flights are approximately 4% more expensive when compared to flights at the same time last year.

When to book flights from Philadelphia to Ontario

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

Estimated round-trip price

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

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

Direct flights	None

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

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How far is Philadelphia to Ontario by plane?
Ontario is 2355.5 mi away from Philadelphia. Flights usually cover this in 7h 20m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Philadelphia Airport to Ontario Airport?
Prices for flights from Philadelphia Airport to Ontario Airport refresh daily.
How many operators does momondo search for flights from Philadelphia Airport to Ontario Airport?
As of October 2025, there are 6 operators available to choose from for flights from Philadelphia Airport to Ontario Airport.
How old do you have to be to fly from Philadelphia Airport to Ontario 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 Philadelphia Airport to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Philadelphia to Ontario?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Philadelphia to Ontario is American Airlines (54% of total bookings). The next most popular airlines are Frontier (19%), Southwest (12%), and Delta (9%).

Best airlines flying from Philadelphia to Ontario

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $130	Free Cancellation	Rating 5.8 3,123 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $166	Free Cancellation	Rating 6.3 8,115 reviews	Search Spirit Airlines flights
Delta	PriceFrom $300	Free Cancellation	Rating 7.9 7,993 reviews	Search Delta flights
United Airlines	PriceFrom $305	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
American Airlines	PriceFrom $307	Free Cancellation	Rating 7.2 11,030 reviews	Search American Airlines flights
Southwest	PriceFrom $367	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Philadelphia to Ontario for you.

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

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

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

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

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

If you are simply researching potential flights to Ontario, momondo offers a useful price alert feature which will track prices for flights to Ontario from Philadelphia and alert you when they change.

An easier way to manage your Ontario trip

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Cheap flights from Philadelphia to Los Angeles from $65

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Philadelphia to Los Angeles departing on 11/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Our best United Airlines deals on Philadelphia to Ontario flight tickets

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How to get the cheapest flight ticket from Philadelphia to Ontario

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

What is the cheapest month to fly to Ontario?

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

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

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

How have Philadelphia to Ontario flight prices changed over time?

As of October 2025, prices for Philadelphia to Ontario flights are approximately 4% more expensive when compared to flights at the same time last year.

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

Frontier, Delta, and American Airlines are the most popular carriers operating from Philadelphia to Ontario

What airlines fly to Ontario?

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

Salt Lake City (SLC) was the most common stop: 33% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Dallas (DFW) offer the lowest average round-trip price of $264.

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

Flights connecting via Atlanta (ATL) have the shortest average one-way travel time: 7h 28m.

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

Phoenix (PHX) has the shortest average layover time for this route: 0h 59m.

When to book flights from Philadelphia to Ontario

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

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

Direct flights

How far is Philadelphia to Ontario by plane?

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

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

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

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

What is the most popular airline from Philadelphia to Ontario?

Best airlines flying from Philadelphia to Ontario

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

Why use momondo?

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

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

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

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

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing California