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 8 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 connection time from Ontario to Philadelphia?

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

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

Denver (DEN) was the most common stop: 63% of momondo users choosing 1-stop flights on this route connected there.

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

Delta, Southwest, 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 Chicago (ORD) have the shortest average one-way travel time: 7h 22m.

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.

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 November 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.

$97 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.

8:44 am - 11:11 pmONT Ontario-PHL Philadelphia

11h 27m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

8:40 am - 11:23 pmPHL Philadelphia-ONT Ontario

17h 43m2 stops Atlanta Hartsfield-Jackson San Francisco

$199Frontier

Sat, Dec 5 - Sat, Dec 12

8:44 am - 11:11 pmONT Ontario-PHL Philadelphia

11h 27m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

8:40 am - 11:23 pmPHL Philadelphia-ONT Ontario

17h 43m2 stops Atlanta Hartsfield-Jackson San Francisco

$228Frontier

Sat, Dec 5 - Sat, Dec 12

2:01 pm - 6:01 amONT Ontario-PHL Philadelphia

13h 00m1 stop Las Vegas Harry Reid Intl

7:00 am - 4:05 pmPHL Philadelphia-ONT Ontario

12h 05m1 stop Seattle/Tacoma Intl

$297Multiple Airlines

Thu, Nov 26 - Thu, Dec 3

5:01 pm - 5:40 amONT Ontario-PHL Philadelphia

9h 39m1 stop Seattle/Tacoma Intl

7:52 pm - 9:53 pmPHL Philadelphia-ONT Ontario

29h 01m1 stop Las Vegas Harry Reid Intl

$298Multiple Airlines

Thu, Dec 10 - Thu, Dec 17

12:20 pm - 10:13 pmONT Ontario-PHL Philadelphia

6h 53m1 stop Atlanta Hartsfield-Jackson

6:59 pm - 11:57 pmPHL Philadelphia-ONT Ontario

7h 58m1 stop Salt Lake City

$341Delta

Thu, Dec 3 - Mon, Dec 7

6:00 am - 5:47 pmONT Ontario-PHL Philadelphia

8h 47m1 stop Salt Lake City

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

8h 12m1 stop Salt Lake City

$345Delta

Thu, Dec 17 - Wed, Jan 6

6:30 am - 4:19 pmONT Ontario-PHL Philadelphia

6h 49m1 stop Phoenix Sky Harbor Intl

4:06 pm - 9:38 pmPHL Philadelphia-ONT Ontario

8h 32m1 stop Dallas/Fort Worth

$355American Airlines

Thu, Dec 10 - Sun, Dec 13

6:30 am - 4:19 pmONT Ontario-PHL Philadelphia

6h 49m1 stop Phoenix Sky Harbor Intl

4:06 pm - 9:38 pmPHL Philadelphia-ONT Ontario

8h 32m1 stop Dallas/Fort Worth

$355American Airlines

Thu, Dec 10 - Sun, Dec 13

11:25 am - 10:10 pmONT Ontario-PHL Philadelphia

7h 45m1 stop Nashville Intl

2:45 pm - 10:05 pmPHL Philadelphia-ONT Ontario

10h 20m2 stops Lambert-St Louis Houston Hobby

$382Southwest

Tue, Dec 1 - Tue, Dec 8

11:20 am - 10:50 pmONT Ontario-PHL Philadelphia

8h 30m1 stop Denver Intl

6:05 am - 1:25 pmPHL Philadelphia-ONT Ontario

10h 20m2 stops Nashville Intl Phoenix Sky Harbor Intl

$384Southwest

Sat, Dec 12 - Sun, Jan 10

Cheap last minute flights

Enter your travel dates to find the best prices.

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

$490Multiple Airlines

Wed, Nov 4 - Tue, Nov 17

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

$491Multiple Airlines

Wed, Nov 4 - Sat, Nov 14

11:52 am - 8:04 pmONT Ontario-PHL Philadelphia

29h 12m2 stops Denver Intl Chicago O'Hare Intl

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

13h 38m1 stop Dallas/Fort Worth

$496Frontier

Wed, Nov 4 - Sat, Nov 7

6:30 am - 11:24 pmONT Ontario-PHL Philadelphia

13h 54m2 stops Denver Intl Raleigh-Durham

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

13h 38m1 stop Dallas/Fort Worth

$506Frontier

Sat, Nov 7 - Tue, Nov 10

12:16 pm - 11:49 pmONT Ontario-PHL Philadelphia

8h 33m1 stop Atlanta Hartsfield-Jackson

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

8h 16m1 stop Salt Lake City

$589Delta

Wed, Nov 4 - Sat, Nov 7

6:00 am - 5:39 pmONT Ontario-PHL Philadelphia

8h 39m1 stop Salt Lake City

3:40 pm - 8:54 pmPHL Philadelphia-ONT Ontario

8h 14m1 stop Atlanta Hartsfield-Jackson

$589Delta

Sat, Nov 7 - Wed, Nov 18

6:00 am - 6:51 pmONT Ontario-PHL Philadelphia

9h 51m2 stops San Francisco Washington, D.C. Dulles Intl

10:30 am - 6:01 pmPHL Philadelphia-ONT Ontario

10h 31m2 stops Washington, D.C. Dulles Intl San Francisco

$599United Airlines

Sat, Nov 7 - Tue, Nov 10

7:00 am - 6:58 pmONT Ontario-PHL Philadelphia

8h 58m1 stop Dallas/Fort Worth

3:06 pm - 11:01 pmPHL Philadelphia-ONT Ontario

10h 55m1 stop Charlotte Douglas

$677American Airlines

Tue, Nov 3 - Fri, Nov 6

7:00 am - 5:55 pmONT Ontario-PHL Philadelphia

7h 55m1 stop Dallas/Fort Worth

9:27 am - 4:19 pmPHL Philadelphia-ONT Ontario

9h 52m1 stop Phoenix Sky Harbor Intl

$677American Airlines

Sat, Nov 7 - Mon, Nov 9

7:00 am - 5:47 pmONT Ontario-PHL Philadelphia

7h 47m1 stop Chicago O'Hare Intl

10:54 am - 8:15 pmPHL Philadelphia-ONT Ontario

12h 21m2 stops Chicago O'Hare Intl San Francisco

$724United Airlines

Sat, Nov 7 - Tue, Nov 10

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Frontier flights from Ontario to Philadelphia

Our best Frontier deals on Ontario to Philadelphia flight tickets

Frontier

Dec 5

ONT8:44 amOntario

11h 27m

2 stops

PHL11:11 pmPhiladelphia

Dec 12

PHL8:40 amPhiladelphia

17h 43m

2 stops

ONT11:23 pmOntario

$199

Frontier

Dec 5

ONT8:44 amOntario

11h 27m

2 stops

PHL11:11 pmPhiladelphia

Dec 12

PHL8:40 amPhiladelphia

17h 43m

2 stops

ONT11:23 pmOntario

$228

Frontier

Dec 5

ONT8:44 amOntario

11h 27m

2 stops

PHL11:11 pmPhiladelphia

Dec 12

PHL9:52 amPhiladelphia

15h 25m

2 stops

ONT10:17 pmOntario

$239

Delta flights from Ontario to Philadelphia

Our best Delta deals on Ontario to Philadelphia flight tickets

Delta

Nov 17

ONT6:00 amOntario

8h 38m

1 stop

PHL5:38 pmPhiladelphia

Dec 4

PHL6:59 pmPhiladelphia

7h 58m

1 stop

ONT11:57 pmOntario

$479

Delta

Nov 15

ONT6:00 amOntario

8h 38m

1 stop

PHL5:38 pmPhiladelphia

Dec 3

PHL6:59 pmPhiladelphia

7h 58m

1 stop

ONT11:57 pmOntario

$508

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 12/5

8:44 am-11:11 pm

2 stops11h 27m

Philadelphia

Sat 12/12

8:40 am-11:23 pm

2 stops17h 43m

$199

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 12/5

8:44 am-11:11 pm

2 stops11h 27m

Philadelphia

Sat 12/12

8:40 am-11:23 pm

2 stops17h 43m

$228

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 11/26

2:01 pm-6:01 am

1 stop13h 00m

Philadelphia

Thu 12/3

7:00 am-4:05 pm

1 stop12h 05m

$297

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 12/10

5:01 pm-5:40 am

1 stop9h 39m

Philadelphia

Thu 12/17

7:52 pm-9:53 pm

1 stop29h 01m

$298

Quickest round-trip

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 12/3

12:20 pm-10:13 pm

1 stop6h 53m

Philadelphia

Mon 12/7

6:59 pm-11:57 pm

1 stop7h 58m

$341

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 12/17

6:00 am-5:47 pm

1 stop8h 47m

Philadelphia

Wed 1/6

7:00 am-12:12 pm

1 stop8h 12m

$345

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 12/10

6:30 am-4:19 pm

1 stop6h 49m

Philadelphia

Sun 12/13

4:06 pm-9:38 pm

1 stop8h 32m

$355

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Thu 12/10

6:30 am-4:19 pm

1 stop6h 49m

Philadelphia

Sun 12/13

4:06 pm-9:38 pm

1 stop8h 32m

$355

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Tue 12/1

11:25 am-10:10 pm

1 stop7h 45m

Philadelphia

Tue 12/8

2:45 pm-10:05 pm

2 stops10h 20m

$382

OntarioPhiladelphia

ONT Ontario - PHL Philadelphia

ONTPHL

Ontario

Sat 12/12

11:20 am-10:50 pm

1 stop8h 30m

Philadelphia

Sun 1/10

6:05 am-1:25 pm

2 stops10h 20m

$384

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 $356 to $635.
The lowest price recently found on this route was $199.

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 Wednesday. Travelers who choose to depart for Philadelphia on a Wednesday will often find tickets for as low as $514. 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 $628.

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 $530. 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 at noon when prices are around $595.

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 $438 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 $289 on momondo.

How have Ontario to Philadelphia flight prices changed over time?

As of November 2026, prices for Ontario to Philadelphia flights are approximately 52% 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

Best Price Found	$97
Fastest flight time	7h 31m
Direct flights	None

The best one-way flight to Philadelphia from Ontario in the past 72 hours is $97. The best round-trip flight deal from Ontario to Philadelphia found on momondo in the last 72 hours is $199.

The fastest flight from Ontario to Philadelphia takes 7h 31m

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 7h 31m.
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 November 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 50% of all bookings. The subsequent popular airlines are Frontier at 17%, Southwest at 12%, 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
Frontier	PriceFrom $157	Free Cancellation	Rating 5.5 2,513 reviews	Search Frontier flights
Delta	PriceFrom $282	Free Cancellation	Rating 7.8 8,696 reviews	Search Delta flights
United Airlines	PriceFrom $312	Free Cancellation	Rating 7.3 10,460 reviews	Search United Airlines flights
American Airlines	PriceFrom $317	Free Cancellation	Rating 7.0 12,230 reviews	Search American Airlines flights
Southwest	PriceFrom $346	Free Cancellation	Rating 8.0 4,215 reviews	Search Southwest flights

Wildwood

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Cherry Hill

King of Prussia

Newark

Essington

Reading

Dover

Dewey Beach

New Castle

North Wildwood

Vineland

Chester

Pottstown

Lewes

Elkton

Avalon

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.