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

Chicago (ORD) has the shortest average layover time for this route: 1h 25m.

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

United Airlines, Alaska Airlines, and Delta 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 $252.

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.

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

Denver (DEN) was the most common stop: 56% of momondo users choosing 1-stop flights on this route connected there.

What airlines fly to Philadelphia?

JetBlue, American Airlines and United Airlines are the top three most popular airlines that fly to Philadelphia from Ontario according to our data. JetBlue 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 8 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 September 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.

$91 Cheap Flights from Ontario to Philadelphia in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

11:52 am - 11:50 pmONT Ontario-PHL Philadelphia

8h 58m1 stop Denver Intl

6:00 am - 4:38 pmPHL Philadelphia-ONT Ontario

13h 38m1 stop Dallas/Fort Worth

$182Frontier

Wed, Oct 21 - Tue, Oct 27

11:26 am - 7:18 amONT Ontario-PHL Philadelphia

16h 52m1 stop Las Vegas Harry Reid Intl

8:44 pm - 11:16 amPHL Philadelphia-ONT Ontario

17h 32m1 stop Las Vegas Harry Reid Intl

$182Frontier

Tue, Oct 20 - Sat, Oct 24

4:09 pm - 5:32 amONT Ontario-PHL Philadelphia

10h 23m1 stop Seattle/Tacoma Intl

6:00 am - 4:38 pmPHL Philadelphia-ONT Ontario

13h 38m1 stop Dallas/Fort Worth

$221Multiple Airlines

Sat, Nov 7 - Wed, Nov 11

2:13 pm - 5:41 amONT Ontario-PHL Philadelphia

12h 28m1 stop Seattle/Tacoma Intl

8:44 pm - 10:31 amPHL Philadelphia-ONT Ontario

16h 47m1 stop Las Vegas Harry Reid Intl

$223Multiple Airlines

Wed, Oct 7 - Tue, Oct 13

1:55 pm - 11:30 pmONT Ontario-PHL Philadelphia

6h 35m1 stop Denver Intl

5:00 am - 10:10 amPHL Philadelphia-ONT Ontario

8h 10m1 stop Denver Intl

$241Southwest

Wed, Nov 4 - Tue, Nov 10

7:00 am - 7:24 pmONT Ontario-PHL Philadelphia

9h 24m1 stop Chicago O'Hare Intl

3:52 pm - 8:58 pmPHL Philadelphia-ONT Ontario

8h 06m1 stop Denver Intl

$241United Airlines

Sat, Oct 17 - Sat, Oct 24

1:55 pm - 11:30 pmONT Ontario-PHL Philadelphia

6h 35m1 stop Denver Intl

5:00 am - 12:10 pmPHL Philadelphia-ONT Ontario

10h 10m2 stops Denver Intl Phoenix Sky Harbor Intl

$246Southwest

Wed, Nov 4 - Tue, Nov 10

6:00 am - 4:49 pmONT Ontario-PHL Philadelphia

7h 49m1 stop Houston George Bush Intcntl

6:15 am - 12:33 pmPHL Philadelphia-ONT Ontario

9h 18m2 stops Chicago O'Hare Intl Denver Intl

$246United Airlines

Sat, Oct 24 - Wed, Oct 28

7:34 pm - 5:26 amONT Ontario-PHL Philadelphia

6h 52m1 stop Phoenix Sky Harbor Intl

7:00 am - 12:14 pmPHL Philadelphia-ONT Ontario

8h 14m1 stop Phoenix Sky Harbor Intl

$257American Airlines

Thu, Oct 15 - Tue, Oct 20

12:43 pm - 12:25 amONT Ontario-PHL Philadelphia

8h 42m1 stop Dallas/Fort Worth

9:27 am - 3:35 pmPHL Philadelphia-ONT Ontario

9h 08m1 stop Phoenix Sky Harbor Intl

$305American Airlines

Sat, Oct 31 - Sun, Nov 1

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 5:42 pmONT Ontario-PHL Philadelphia

8h 42m1 stop Salt Lake City

6:49 pm - 11:55 pmPHL Philadelphia-ONT Ontario

8h 06m1 stop Salt Lake City

$491Delta

Tue, Sep 22 - Thu, Oct 8

6:00 am - 5:42 pmONT Ontario-PHL Philadelphia

8h 42m1 stop Salt Lake City

7:20 am - 12:36 pmPHL Philadelphia-ONT Ontario

8h 16m1 stop Salt Lake City

$491Delta

Tue, Sep 22 - Tue, Oct 6

3:14 pm - 5:40 amONT Ontario-PHL Philadelphia

11h 26m1 stop Seattle/Tacoma Intl

7:02 am - 6:00 pmPHL Philadelphia-ONT Ontario

13h 58m1 stop Seattle/Tacoma Intl

$493Alaska Airlines

Fri, Sep 18 - Tue, Oct 6

3:14 pm - 5:40 amONT Ontario-PHL Philadelphia

11h 26m1 stop Seattle/Tacoma Intl

7:02 am - 6:00 pmPHL Philadelphia-ONT Ontario

13h 58m1 stop Seattle/Tacoma Intl

$497Alaska Airlines

Fri, Sep 18 - Tue, Oct 6

6:08 am - 7:15 pmONT Ontario-PHL Philadelphia

10h 07m1 stop San Francisco

8:00 am - 12:46 pmPHL Philadelphia-ONT Ontario

7h 46m1 stop Denver Intl

$515United Airlines

Tue, Sep 22 - Tue, Oct 6

6:00 am - 4:46 pmONT Ontario-PHL Philadelphia

7h 46m1 stop Houston George Bush Intcntl

6:00 am - 12:18 pmPHL Philadelphia-ONT Ontario

9h 18m1 stop San Francisco

$526United Airlines

Tue, Sep 22 - Mon, Oct 5

1:05 pm - 11:31 pmONT Ontario-PHL Philadelphia

7h 26m1 stop Phoenix Sky Harbor Intl

5:45 pm - 10:37 pmPHL Philadelphia-ONT Ontario

7h 52m1 stop Dallas/Fort Worth

$569American Airlines

Sat, Sep 19 - Tue, Sep 22

1:05 pm - 11:31 pmONT Ontario-PHL Philadelphia

7h 26m1 stop Phoenix Sky Harbor Intl

12:04 pm - 6:17 pmPHL Philadelphia-ONT Ontario

9h 13m2 stops Charlotte Douglas Phoenix Sky Harbor Intl

$574American Airlines

Sat, Sep 19 - Tue, Sep 22

2:00 pm - 11:50 pmONT Ontario-PHL Philadelphia

6h 50m1 stop Denver Intl

5:00 am - 10:00 amPHL Philadelphia-ONT Ontario

8h 00m1 stop Denver Intl

$745Southwest

Thu, Sep 17 - Sun, Sep 20

6:20 am - 4:45 pmONT Ontario-PHL Philadelphia

7h 25m1 stop Denver Intl

5:00 am - 11:35 amPHL Philadelphia-ONT Ontario

9h 35m2 stops Denver Intl Phoenix Sky Harbor Intl

$750Southwest

Fri, Sep 18 - Sun, Sep 20

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Southwest flights from Ontario to Philadelphia

Our best Southwest deals on Ontario to Philadelphia flight tickets

Southwest

Dec 3

ONT11:25 amOntario

7h 45m

1 stop

PHL10:10 pmPhiladelphia

Dec 7

PHL2:45 pmPhiladelphia

10h 15m

2 stops

ONT10:00 pmOntario

$278

Southwest

Dec 11

ONT11:55 pmOntario

7h 50m

1 stop

PHL10:45 amPhiladelphia

Dec 14

PHL5:00 amPhiladelphia

10h 10m

2 stops

ONT12:10 pmOntario

$294

Southwest

Oct 26

ONT2:50 pmOntario

7h 20m

1 stop

PHL1:10 amPhiladelphia

Oct 30

PHL12:35 pmPhiladelphia

11h 50m

2 stops

ONT9:25 pmOntario

$295

Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets

Frontier

Oct 24

ONT11:52 amOntario

10h 24m

1 stop

PHL1:16 amPhiladelphia

Oct 28

PHL6:00 amPhiladelphia

13h 38m

1 stop

ONT4:38 pmOntario

$182

Frontier

Oct 14

ONT11:26 amOntario

16h 52m

1 stop

PHL7:18 amPhiladelphia

Oct 19

PHL8:44 pmPhiladelphia

22h 46m

1 stop

ONT4:30 pmOntario

$208

Frontier

Oct 15

ONT8:35 pmOntario

7h 43m

1 stop

PHL7:18 amPhiladelphia

Oct 19

PHL8:44 pmPhiladelphia

22h 46m

1 stop

ONT4:30 pmOntario

$224

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Wed 10/21

11:52 am-11:50 pm

1 stop8h 58m

Philadelphia

Tue 10/27

6:00 am-4:38 pm

1 stop13h 38m

$182

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Tue 10/20

11:26 am-7:18 am

1 stop16h 52m

Philadelphia

Sat 10/24

8:44 pm-11:16 am

1 stop17h 32m

$182

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 11/7

4:09 pm-5:32 am

1 stop10h 23m

Philadelphia

Wed 11/11

6:00 am-4:38 pm

1 stop13h 38m

$221

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Wed 10/7

2:13 pm-5:41 am

1 stop12h 28m

Philadelphia

Tue 10/13

8:44 pm-10:31 am

1 stop16h 47m

$223

Quickest round-trip

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Wed 11/4

1:55 pm-11:30 pm

1 stop6h 35m

Philadelphia

Tue 11/10

5:00 am-10:10 am

1 stop8h 10m

$241

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 10/17

7:00 am-7:24 pm

1 stop9h 24m

Philadelphia

Sat 10/24

3:52 pm-8:58 pm

1 stop8h 06m

$241

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Wed 11/4

1:55 pm-11:30 pm

1 stop6h 35m

Philadelphia

Tue 11/10

5:00 am-12:10 pm

2 stops10h 10m

$246

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 10/24

6:00 am-4:49 pm

1 stop7h 49m

Philadelphia

Wed 10/28

6:15 am-12:33 pm

2 stops9h 18m

$246

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 10/15

7:34 pm-5:26 am

1 stop6h 52m

Philadelphia

Tue 10/20

7:00 am-12:14 pm

1 stop8h 14m

$257

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 10/31

12:43 pm-12:25 am

1 stop8h 42m

Philadelphia

Sun 11/1

9:27 am-3:35 pm

1 stop9h 08m

$305

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

Prices are currently low for flights on this route.

Typical prices usually range from $365 to $466.
The lowest price recently found on this route was $182.

What is the cheapest month to fly to Philadelphia?

The cheapest month to fly to Philadelphia from Ontario is in July. Flight prices, which tend to average around $358, 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 $384.

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 $493. 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 $600.

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 $505. 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 $546.

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 $431 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 $322 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of September 2026, prices for Ontario to Philadelphia flights are approximately 21% 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

Best Price Found	$91
Fastest flight time	6h 35m
Direct flights	None

The best one-way flight to Philadelphia from Ontario in the past 72 hours is $91. The best round-trip flight deal from Ontario to Philadelphia found on momondo in the last 72 hours is $182.

The fastest flight from Ontario to Philadelphia takes 6h 35m

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

Search flight deals

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 6h 35m.
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 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 51% of all bookings. The subsequent popular airlines are Frontier at 18%, Delta at 12%, and Southwest 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
Frontier	PriceFrom $157	Free Cancellation	Rating 5.6 2,600 reviews	Search Frontier flights
Delta	PriceFrom $282	Free Cancellation	Rating 7.8 8,579 reviews	Search Delta flights
United Airlines	PriceFrom $312	Free Cancellation	Rating 7.4 10,213 reviews	Search United Airlines flights
American Airlines	PriceFrom $321	Free Cancellation	Rating 7.1 12,075 reviews	Search American Airlines flights
Southwest	PriceFrom $346	Free Cancellation	Rating 8.0 4,188 reviews	Search Southwest flights

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Cherry Hill

King of Prussia

Newark

Reading

Essington

Dover

Dewey Beach

New Castle

North Wildwood

Chester

Vineland

Avalon

Norristown

Pottstown

Stone Harbor

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.