How many flights depart from Philadelphia to Ontario on average per week?

As of October 2026, there are 4 flights per week flying from Philadelphia to Ontario. The most common day of the week flights depart is Mon, with 25% of flights taking off on this day.

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

Flights via Chicago (MDW) offer the lowest average round-trip price of $374.

What airlines fly to Ontario?

United Airlines, American Airlines and JetBlue are the top three most popular airlines that fly to Ontario from Philadelphia according to our data. United 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 9 different airlines that fly to Ontario on a routine basis, so you have a few additional options to choose from.

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

Phoenix (PHX) has the shortest average layover time for this route: 1h 16m.

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

Chicago (MDW) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 7h 54m.

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

Delta, Alaska Airlines, and Southwest 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 2026, there are 5 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.

$85 Cheap Flights from Philadelphia to Ontario in 2026/27

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Find the cheapest flights from Philadelphia to Los Angeles

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8:44 pm - 7:04 amPHL Philadelphia-ONT Ontario

13h 20m1 stop Las Vegas Harry Reid Intl

5:25 pm - 7:18 amONT Ontario-PHL Philadelphia

10h 53m1 stop Las Vegas Harry Reid Intl

$177Frontier

Thu, Oct 22 - Sat, Oct 24

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

17h 32m1 stop Las Vegas Harry Reid Intl

5:25 pm - 7:18 amONT Ontario-PHL Philadelphia

10h 53m1 stop Las Vegas Harry Reid Intl

$184Frontier

Wed, Oct 21 - Sat, Oct 24

9:41 pm - 7:07 amPHL Philadelphia-ONT Ontario

12h 26m1 stop Las Vegas Harry Reid Intl

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

9h 39m1 stop Seattle/Tacoma Intl

$309Multiple Airlines

Thu, Nov 26 - Mon, Dec 14

5:50 am - 10:29 amPHL Philadelphia-ONT Ontario

7h 39m1 stop Denver Intl

2:13 pm - 6:37 amONT Ontario-PHL Philadelphia

13h 24m1 stop Seattle/Tacoma Intl

$314Multiple Airlines

Sat, Oct 24 - Sat, Oct 31

5:45 am - 11:06 amPHL Philadelphia-ONT Ontario

8h 21m1 stop Atlanta Hartsfield-Jackson

12:18 pm - 12:55 amONT Ontario-PHL Philadelphia

9h 37m1 stop Atlanta Hartsfield-Jackson

$367Delta

Sat, Nov 7 - Sat, Nov 14

6:00 am - 11:06 amPHL Philadelphia-ONT Ontario

8h 06m1 stop Atlanta Hartsfield-Jackson

12:16 pm - 12:55 amONT Ontario-PHL Philadelphia

9h 39m1 stop Atlanta Hartsfield-Jackson

$368Delta

Sat, Oct 31 - Sat, Nov 7

5:00 am - 11:59 amPHL Philadelphia-ONT Ontario

9h 59m1 stop Dallas/Fort Worth

1:24 pm - 10:59 pmONT Ontario-PHL Philadelphia

6h 35m1 stop Phoenix Sky Harbor Intl

$369American Airlines

Tue, Jan 5 - Fri, Jan 8

10:45 am - 3:16 pmPHL Philadelphia-ONT Ontario

7h 31m1 stop Phoenix Sky Harbor Intl

1:23 pm - 10:59 pmONT Ontario-PHL Philadelphia

6h 36m1 stop Phoenix Sky Harbor Intl

$369American Airlines

Sat, Oct 31 - Sat, Nov 7

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

8h 00m1 stop Denver Intl

6:20 am - 3:50 pmONT Ontario-PHL Philadelphia

6h 30m1 stop Chicago Midway

$369Southwest

Thu, Feb 18 - Sat, Feb 20

1:25 pm - 6:15 pmPHL Philadelphia-ONT Ontario

7h 50m1 stop Chicago Midway

1:50 pm - 11:25 pmONT Ontario-PHL Philadelphia

6h 35m1 stop Denver Intl

$369Southwest

Wed, Dec 16 - Sun, Jan 10

Cheap last minute flights

Enter your travel dates to find the best prices.

6:00 am - 4:46 pmPHL Philadelphia-ONT Ontario

13h 46m1 stop Dallas/Fort Worth

6:15 am - 1:16 amONT Ontario-PHL Philadelphia

16h 01m1 stop Denver Intl

$405Frontier

Tue, Oct 6 - Tue, Oct 13

6:00 am - 4:46 pmPHL Philadelphia-ONT Ontario

13h 46m1 stop Dallas/Fort Worth

5:25 pm - 7:18 amONT Ontario-PHL Philadelphia

10h 53m1 stop Las Vegas Harry Reid Intl

$405Frontier

Tue, Oct 6 - Tue, Oct 13

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

13h 58m1 stop Seattle/Tacoma Intl

5:25 pm - 7:18 amONT Ontario-PHL Philadelphia

10h 53m1 stop Las Vegas Harry Reid Intl

$501Multiple Airlines

Tue, Oct 6 - Tue, Oct 13

6:41 pm - 10:17 amPHL Philadelphia-ONT Ontario

18h 36m1 stop Seattle/Tacoma Intl

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

8h 58m1 stop Denver Intl

$506Multiple Airlines

Wed, Oct 7 - Wed, Oct 14

12:50 pm - 6:43 pmPHL Philadelphia-ONT Ontario

8h 53m1 stop Phoenix Sky Harbor Intl

12:43 pm - 10:52 pmONT Ontario-PHL Philadelphia

7h 09m1 stop Dallas/Fort Worth

$569American Airlines

Tue, Oct 6 - Tue, Oct 13

6:35 am - 11:06 amPHL Philadelphia-ONT Ontario

7h 31m1 stop Atlanta Hartsfield-Jackson

7:07 am - 6:18 pmONT Ontario-PHL Philadelphia

8h 11m1 stop Atlanta Hartsfield-Jackson

$569Delta

Wed, Oct 7 - Sat, Oct 17

1:20 pm - 7:50 pmPHL Philadelphia-ONT Ontario

9h 30m2 stops Chicago Midway Phoenix Sky Harbor Intl

10:55 am - 9:50 pmONT Ontario-PHL Philadelphia

7h 55m2 stops Phoenix Sky Harbor Intl Lambert-St Louis

$579Southwest

Tue, Oct 6 - Tue, Oct 13

1:20 pm - 8:50 pmPHL Philadelphia-ONT Ontario

10h 30m2 stops Chicago Midway Dallas Love Field

9:15 am - 9:05 pmONT Ontario-PHL Philadelphia

8h 50m2 stops Phoenix Sky Harbor Intl Chicago Midway

$579Southwest

Tue, Oct 6 - Tue, Oct 13

5:40 pm - 10:59 pmPHL Philadelphia-ONT Ontario

8h 19m1 stop Charlotte Douglas

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

8h 42m1 stop Dallas/Fort Worth

$598American Airlines

Wed, Oct 7 - Mon, Oct 12

5:20 am - 11:06 amPHL Philadelphia-ONT Ontario

8h 46m1 stop Atlanta Hartsfield-Jackson

11:08 pm - 9:29 amONT Ontario-PHL Philadelphia

7h 21m1 stop Atlanta Hartsfield-Jackson

$598Delta

Wed, Oct 7 - Mon, Oct 19

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Frontier flights from Philadelphia to Ontario

Our best Frontier deals on Philadelphia to Ontario flight tickets

Frontier

Oct 22

PHL8:44 pmPhiladelphia

13h 20m

1 stop

ONT7:04 amOntario

Oct 24

ONT5:25 pmOntario

10h 53m

1 stop

PHL7:18 amPhiladelphia

$177

Frontier

Oct 21

PHL8:44 pmPhiladelphia

17h 32m

1 stop

ONT11:16 amOntario

Oct 24

ONT5:25 pmOntario

10h 53m

1 stop

PHL7:18 amPhiladelphia

$184

Frontier

Nov 10

PHL6:00 amPhiladelphia

20h 51m

2 stops

ONT11:51 pmOntario

Nov 16

ONT6:25 amOntario

13h 59m

2 stops

PHL11:24 pmPhiladelphia

$189

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Thu 10/22

8:44 pm-7:04 am

1 stop13h 20m

Ontario

Sat 10/24

5:25 pm-7:18 am

1 stop10h 53m

$177

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Wed 10/21

8:44 pm-11:16 am

1 stop17h 32m

Ontario

Sat 10/24

5:25 pm-7:18 am

1 stop10h 53m

$184

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Thu 11/26

9:41 pm-7:07 am

1 stop12h 26m

Ontario

Mon 12/14

5:01 pm-5:40 am

1 stop9h 39m

$309

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 10/24

5:50 am-10:29 am

1 stop7h 39m

Ontario

Sat 10/31

2:13 pm-6:37 am

1 stop13h 24m

$314

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 11/7

5:45 am-11:06 am

1 stop8h 21m

Ontario

Sat 11/14

12:18 pm-12:55 am

1 stop9h 37m

$367

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 10/31

6:00 am-11:06 am

1 stop8h 06m

Ontario

Sat 11/7

12:16 pm-12:55 am

1 stop9h 39m

$368

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Tue 1/5

5:00 am-11:59 am

1 stop9h 59m

Ontario

Fri 1/8

1:24 pm-10:59 pm

1 stop6h 35m

$369

Quickest round-trip

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 10/31

10:45 am-3:16 pm

1 stop7h 31m

Ontario

Sat 11/7

1:23 pm-10:59 pm

1 stop6h 36m

$369

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Thu 2/18

5:00 am-10:00 am

1 stop8h 00m

Ontario

Sat 2/20

6:20 am-3:50 pm

1 stop6h 30m

$369

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Wed 12/16

1:25 pm-6:15 pm

1 stop7h 50m

Ontario

Sun 1/10

1:50 pm-11:25 pm

1 stop6h 35m

$369

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 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

Other information

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

Prices are currently low for flights on this route.

Typical prices usually range from $347 to $466.
The lowest price recently found on this route was $177.

What is the cheapest month to fly to Ontario?

In general, September 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 $356. If you aren’t able to travel during the month of September, then book flights to Ontario from Philadelphia during May instead. Flights to Ontario in May, while not as cheap as those in September, still average around $370.

How far in advance should I book a flight from Philadelphia 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 $410 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 $285 on momondo.

Can stopping save me money on Philadelphia to Ontario flights?

You could potentially save up to 10% on your flight if you consider stops on a Philadelphia to Ontario flight.

How have Philadelphia to Ontario flight prices changed over time?

As of October 2026, prices for Philadelphia to Ontario flights are approximately 39% 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

Best Price Found	$85
Fastest flight time	7h 31m
Direct flights	None

The best one-way flight to Ontario from Philadelphia in the past 72 hours is $85. The best round-trip flight deal from Philadelphia to Ontario found on momondo in the last 72 hours is $177.

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

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

Search flight deals

Frequently asked questions about flying from Philadelphia to Ontario

How far is Philadelphia to Ontario by plane?
Ontario is 2355.5 mi away from Philadelphia. Flights usually cover this in 7h 31m, 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 2026, there are 5 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 (40% of total bookings). The next most popular airlines are Frontier (22%), Southwest (18%), and Delta (12%).

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
Delta	PriceFrom $184	Free Cancellation	Rating 7.8 8,630 reviews	Search Delta flights
Frontier	PriceFrom $215	Free Cancellation	Rating 5.6 2,565 reviews	Search Frontier flights
United Airlines	PriceFrom $290	Free Cancellation	Rating 7.4 10,280 reviews	Search United Airlines flights
Southwest	PriceFrom $313	Free Cancellation	Rating 7.9 4,215 reviews	Search Southwest flights
American Airlines	PriceFrom $316	Free Cancellation	Rating 7.0 12,127 reviews	Search American Airlines flights

United Airlines Flights From Philadelphia to Ontario
United Airlines operates around 4 flights from Philadelphia to Ontario every week. The average price of these flights found in the last 72 hours has been $466, but momondo users have found United Airlines deals from Philadelphia to Ontario from as low as $290 round-trip. United Airlines has been scored 7.4/10 in 10,283 reviews.

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 $85

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 10/22. 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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Frontier flights from Philadelphia to Ontario

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How to get the cheapest flight ticket from Philadelphia to Ontario

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

What is the cheapest month to fly to Ontario?

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

Can stopping save me money on Philadelphia to Ontario flights?

How have Philadelphia to Ontario flight prices changed over time?

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

What airlines fly to Ontario?

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

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

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

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

How many flights depart from Philadelphia to Ontario on average per week?

When to book flights from Philadelphia to Ontario

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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying 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?

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

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