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

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

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

Atlanta (ATL) was the most common stop: 45% 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 35% 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 Denver (DEN) have the shortest average one-way travel time: 7h 20m.

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

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $242.

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

Denver (DEN) has the shortest average layover time for this route: 1h 20m.

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 September 2025, there are 6 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.

$97 Cheap Flights from Ontario to Philadelphia in 2025/26

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Find the cheapest flights from Ontario to Philadelphia

Round-trip

One-way

Last minute

Cheap round-trip flights

6:53 am - 4:49 amONT-PHL

18h 56m1 stop

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

$164Frontier

Find Deal

Thu, Nov 13 - Sat, Nov 15

6:53 am - 4:49 amONT-PHL

18h 56m1 stop

8:00 am - 3:22 pmPHL-ONT

10h 22m1 stop

$165Frontier

Find Deal

Thu, Oct 30 - Sun, Nov 2

8:34 am - 1:41 amONT-PHL

14h 07m1 stop

8:00 am - 3:22 pmPHL-ONT

10h 22m1 stop

$166Frontier

Find Deal

Fri, Oct 24 - Sun, Nov 2

12:05 pm - 4:49 amONT-PHL

13h 44m1 stop

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

$174Frontier

Find Deal

Thu, Nov 6 - Thu, Nov 13

8:34 am - 1:41 amONT-PHL

14h 07m1 stop

6:19 am - 11:10 amPHL-ONT

7h 51m1 stop

$175Frontier

Find Deal

Fri, Oct 24 - Thu, Oct 30

8:59 pm - 12:57 amONT-PHL

24h 58m1 stop

8:15 am - 7:49 amPHL-ONT

26h 34m1 stop

$185Frontier

Find Deal

Wed, Oct 1 - Wed, Oct 8

4:17 pm - 1:41 amONT-PHL

30h 24m1 stop

11:30 am - 7:49 amPHL-ONT

23h 19m1 stop

$186Frontier

Find Deal

Thu, Oct 9 - Sun, Oct 12

4:05 pm - 4:49 amONT-PHL

9h 44m1 stop

6:19 am - 11:50 pmPHL-ONT

20h 31m1 stop

$198Frontier

Find Deal

Fri, Nov 7 - Mon, Nov 10

4:11 pm - 5:42 amONT-PHL

10h 31m1 stop

8:00 am - 3:22 pmPHL-ONT

10h 22m1 stop

$255Multiple Airlines

Find Deal

Tue, Oct 28 - Sun, Nov 2

6:53 am - 4:49 amONT-PHL

18h 56m1 stop

7:02 am - 3:17 pmPHL-ONT

11h 15m1 stop

$260Multiple Airlines

Find Deal

Wed, Oct 29 - Wed, Nov 5

Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets

Frontier

Nov 13

ONT6:53 amOntario

18h 56m

1 stop

PHL4:49 amPhiladelphia

Nov 15

PHL6:19 amPhiladelphia

7h 51m

1 stop

ONT11:10 amOntario

$164

Find similar

Frontier

Oct 30

ONT6:53 amOntario

18h 56m

1 stop

PHL4:49 amPhiladelphia

Nov 2

PHL8:00 amPhiladelphia

10h 22m

1 stop

ONT3:22 pmOntario

$165

Find similar

Frontier

Oct 24

ONT8:34 amOntario

14h 07m

1 stop

PHL1:41 amPhiladelphia

Nov 2

PHL8:00 amPhiladelphia

10h 22m

1 stop

ONT3:22 pmOntario

$166

Find similar

Fly from

Fly to

Route

Depart

Return

Price

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 11/13

6:53 am-4:49 am

1 stop18h 56m

Philadelphia

Sat 11/15

6:19 am-11:10 am

1 stop7h 51m

$164

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 10/30

6:53 am-4:49 am

1 stop18h 56m

Philadelphia

Sun 11/2

8:00 am-3:22 pm

1 stop10h 22m

$165

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 10/24

8:34 am-1:41 am

1 stop14h 07m

Philadelphia

Sun 11/2

8:00 am-3:22 pm

1 stop10h 22m

$166

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 11/6

12:05 pm-4:49 am

1 stop13h 44m

Philadelphia

Thu 11/13

6:19 am-11:10 am

1 stop7h 51m

$174

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 10/24

8:34 am-1:41 am

1 stop14h 07m

Philadelphia

Thu 10/30

6:19 am-11:10 am

1 stop7h 51m

$175

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 10/1

8:59 pm-12:57 am

1 stop24h 58m

Philadelphia

Wed 10/8

8:15 am-7:49 am

1 stop26h 34m

$185

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Thu 10/9

4:17 pm-1:41 am

1 stop30h 24m

Philadelphia

Sun 10/12

11:30 am-7:49 am

1 stop23h 19m

$186

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Fri 11/7

4:05 pm-4:49 am

1 stop9h 44m

Philadelphia

Mon 11/10

6:19 am-11:50 pm

1 stop20h 31m

$198

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Tue 10/28

4:11 pm-5:42 am

1 stop10h 31m

Philadelphia

Sun 11/2

8:00 am-3:22 pm

1 stop10h 22m

$255

OntarioPhiladelphia

ONT - PHL

ONTPHL

Ontario

Wed 10/29

6:53 am-4:49 am

1 stop18h 56m

Philadelphia

Wed 11/5

7:02 am-3:17 pm

1 stop11h 15m

$260

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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 September. Flight prices, which tend to average around $348, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Philadelphia, with average flight prices from Ontario averaging around $366.

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

The cheapest day to depart from Ontario to Philadelphia is on a Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $412. 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 $366. 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 $504.

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 $410 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 $325 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of September 2025, prices for Ontario to Philadelphia flights are approximately 18% 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

Direct flights	None

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

Search flight deals

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 9h 12m.
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 September 2025, there are 6 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 20%, Southwest at 14%, and Delta at 11%.

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
Spirit Airlines	PriceFrom $88	Free Cancellation	Rating 6.3 8,023 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $151	Free Cancellation	Rating 5.8 3,173 reviews	Search Frontier flights
Delta	PriceFrom $296	Free Cancellation	Rating 7.9 7,961 reviews	Search Delta flights
American Airlines	PriceFrom $306	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $361	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
United Airlines	PriceFrom $407	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights

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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.

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Cheap flights from Ontario to Philadelphia from $97

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Philadelphia departing on 10/31. 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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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

What is the cheapest month to fly to Philadelphia?

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

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

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

How have Ontario to Philadelphia flight prices changed over time?

As of September 2025, prices for Ontario to Philadelphia flights are approximately 18% more expensive when compared to flights at the same time last year.

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

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

What airlines fly to Philadelphia?

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

Atlanta (ATL) was the most common stop: 45% of momondo users choosing 1-stop flights on this route connected there.

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

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $242.

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

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

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

Denver (DEN) has the shortest average layover time for this route: 1h 20m.

When to book flights from Ontario to Philadelphia

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

Direct flights

How far is Ontario to Philadelphia by plane?

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

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

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

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

What is the most popular airline from Ontario to Philadelphia?

Best airlines flying from Ontario to Philadelphia

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

Traveling to a place near Philadelphia?

Why use momondo?

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

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

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

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

An easier way to manage your Philadelphia 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 Pennsylvania