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.

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

As of September 2026, there are 3 flights per week flying from Philadelphia to Ontario. The most common day of the week flights depart is Mon, with 33% of flights taking off on this day.

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

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

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

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

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.

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 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.

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 September 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.

$115 Cheap Flights from Philadelphia to Ontario in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Philadelphia to Los Angeles

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 4:48 pmPHL Philadelphia-ONT Ontario

13h 48m1 stop Dallas/Fort Worth

2:28 pm - 7:18 amONT Ontario-PHL Philadelphia

13h 50m1 stop Las Vegas Harry Reid Intl

$258Frontier

Tue, Oct 20 - Mon, Oct 26

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

$258Frontier

Sat, Oct 3 - Sat, Oct 10

4:17 pm - 11:54 pmPHL Philadelphia-ONT Ontario

10h 37m1 stop Portland

8:35 pm - 7:18 amONT Ontario-PHL Philadelphia

7h 43m1 stop Las Vegas Harry Reid Intl

$314Multiple Airlines

Thu, Oct 15 - Mon, Oct 19

4:17 pm - 11:54 pmPHL Philadelphia-ONT Ontario

10h 37m1 stop Portland

8:35 pm - 7:18 amONT Ontario-PHL Philadelphia

7h 43m1 stop Las Vegas Harry Reid Intl

$319Multiple Airlines

Mon, Oct 5 - Fri, Oct 16

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

9h 18m1 stop San Francisco

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

7h 49m1 stop Houston George Bush Intcntl

$352United Airlines

Mon, Sep 28 - Tue, Sep 29

10:45 am - 6:10 pmPHL Philadelphia-ONT Ontario

10h 25m1 stop Phoenix Sky Harbor Intl

6:27 am - 5:38 pmONT Ontario-PHL Philadelphia

8h 11m1 stop Phoenix Sky Harbor Intl

$357American Airlines

Tue, Dec 15 - Wed, Jan 6

2:00 pm - 9:11 pmPHL Philadelphia-ONT Ontario

10h 11m1 stop Dallas/Fort Worth

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

8h 58m1 stop Dallas/Fort Worth

$357American Airlines

Sat, Oct 31 - Tue, Nov 3

7:20 am - 12:14 pmPHL Philadelphia-ONT Ontario

7h 54m1 stop Salt Lake City

5:15 pm - 6:05 amONT Ontario-PHL Philadelphia

9h 50m1 stop Salt Lake City

$357Delta

Tue, Sep 22 - Mon, Sep 28

7:20 am - 12:14 pmPHL Philadelphia-ONT Ontario

7h 54m1 stop Salt Lake City

6:00 pm - 5:50 amONT Ontario-PHL Philadelphia

8h 50m1 stop Seattle/Tacoma Intl

$357Delta

Wed, Sep 23 - Tue, Sep 29

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

9h 12m1 stop San Francisco

7:13 pm - 7:49 amONT Ontario-PHL Philadelphia

9h 36m1 stop San Francisco

$388United Airlines

Fri, Sep 11 - Sun, Sep 20

Cheap last minute flights

Enter your travel dates to find the best prices.

8:00 am - 3:49 pmPHL Philadelphia-ONT Ontario

10h 49m1 stop Las Vegas Harry Reid Intl

3:40 pm - 6:30 amONT Ontario-PHL Philadelphia

11h 50m1 stop Las Vegas Harry Reid Intl

$390Frontier

Sat, Sep 5 - Tue, Sep 8

8:37 pm - 11:50 pmPHL Philadelphia-ONT Ontario

30h 13m1 stop Denver Intl

3:40 pm - 6:30 amONT Ontario-PHL Philadelphia

11h 50m1 stop Las Vegas Harry Reid Intl

$390Frontier

Wed, Sep 2 - Sat, Sep 5

8:37 pm - 10:04 amPHL Philadelphia-ONT Ontario

16h 27m1 stop Denver Intl

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

11h 26m1 stop Seattle/Tacoma Intl

$478Multiple Airlines

Wed, Sep 2 - Sat, Sep 19

8:00 am - 3:49 pmPHL Philadelphia-ONT Ontario

10h 49m1 stop Las Vegas Harry Reid Intl

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

11h 26m1 stop Seattle/Tacoma Intl

$480Multiple Airlines

Wed, Sep 2 - Sat, Sep 19

3:48 pm - 8:53 pmPHL Philadelphia-ONT Ontario

8h 05m1 stop Denver Intl

6:08 am - 5:30 pmONT Ontario-PHL Philadelphia

8h 22m1 stop San Francisco

$485United Airlines

Sat, Sep 5 - Sun, Sep 6

9:20 am - 8:05 pmPHL Philadelphia-ONT Ontario

13h 45m2 stops Orlando Las Vegas Harry Reid Intl

9:40 am - 9:50 pmONT Ontario-PHL Philadelphia

9h 10m2 stops Las Vegas Harry Reid Intl Nashville Intl

$533Southwest

Sat, Sep 5 - Tue, Sep 8

3:58 pm - 9:52 pmPHL Philadelphia-ONT Ontario

8h 54m1 stop Atlanta Hartsfield-Jackson

6:00 pm - 5:50 amONT Ontario-PHL Philadelphia

8h 50m1 stop Seattle/Tacoma Intl

$550Delta

Thu, Sep 3 - Sat, Sep 12

7:20 am - 12:16 pmPHL Philadelphia-ONT Ontario

7h 56m1 stop Salt Lake City

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

8h 47m1 stop Salt Lake City

$550Delta

Fri, Sep 4 - Sun, Sep 6

8:00 am - 12:50 pmPHL Philadelphia-ONT Ontario

7h 50m1 stop Denver Intl

9:01 am - 12:59 amONT Ontario-PHL Philadelphia

12h 58m2 stops San Francisco Chicago O'Hare Intl

$555United Airlines

Thu, Sep 3 - Sun, Sep 6

6:00 am - 12:40 pmPHL Philadelphia-ONT Ontario

9h 40m2 stops Denver Intl Las Vegas Harry Reid Intl

11:00 am - 10:55 pmONT Ontario-PHL Philadelphia

8h 55m2 stops Las Vegas Harry Reid Intl Denver Intl

$559Southwest

Wed, Sep 2 - Sat, Sep 5

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Frontier flights from Philadelphia to Ontario

Our best Frontier deals on Philadelphia to Ontario flight tickets

Frontier

Oct 3

PHL6:00 amPhiladelphia

13h 46m

1 stop

ONT4:46 pmOntario

Oct 10

ONT5:25 pmOntario

10h 53m

1 stop

PHL7:18 amPhiladelphia

$258

Frontier

Oct 3

PHL6:00 amPhiladelphia

13h 46m

1 stop

ONT4:46 pmOntario

Oct 10

ONT5:25 pmOntario

10h 53m

1 stop

PHL7:18 amPhiladelphia

$259

Frontier

Oct 19

PHL8:44 pmPhiladelphia

16h 47m

1 stop

ONT10:31 amOntario

Oct 23

ONT11:52 amOntario

10h 24m

1 stop

PHL1:16 amPhiladelphia

$264

United Airlines flights from Philadelphia to Ontario

Our best United Airlines deals on Philadelphia to Ontario flight tickets

United Airlines

Sep 28

PHL6:00 amPhiladelphia

9h 18m

1 stop

ONT12:18 pmOntario

Sep 29

ONT6:00 amOntario

7h 49m

1 stop

PHL4:49 pmPhiladelphia

$352

United Airlines

Sep 10

PHL6:00 amPhiladelphia

9h 12m

1 stop

ONT12:12 pmOntario

Sep 30

ONT1:24 pmOntario

6h 56m

1 stop

PHL11:20 pmPhiladelphia

$361

United Airlines

Sep 10

PHL11:04 amPhiladelphia

11h 57m

2 stops

ONT8:01 pmOntario

Sep 30

ONT1:24 pmOntario

6h 56m

1 stop

PHL11:20 pmPhiladelphia

$371

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Tue 10/20

6:00 am-4:48 pm

1 stop13h 48m

Ontario

Mon 10/26

2:28 pm-7:18 am

1 stop13h 50m

$258

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 10/3

6:00 am-4:46 pm

1 stop13h 46m

Ontario

Sat 10/10

5:25 pm-7:18 am

1 stop10h 53m

$258

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Thu 10/15

4:17 pm-11:54 pm

1 stop10h 37m

Ontario

Mon 10/19

8:35 pm-7:18 am

1 stop7h 43m

$314

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Mon 10/5

4:17 pm-11:54 pm

1 stop10h 37m

Ontario

Fri 10/16

8:35 pm-7:18 am

1 stop7h 43m

$319

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Mon 9/28

6:00 am-12:18 pm

1 stop9h 18m

Ontario

Tue 9/29

6:00 am-4:49 pm

1 stop7h 49m

$352

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Tue 12/15

10:45 am-6:10 pm

1 stop10h 25m

Ontario

Wed 1/6

6:27 am-5:38 pm

1 stop8h 11m

$357

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Sat 10/31

2:00 pm-9:11 pm

1 stop10h 11m

Ontario

Tue 11/3

7:00 am-6:58 pm

1 stop8h 58m

$357

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Tue 9/22

7:20 am-12:14 pm

1 stop7h 54m

Ontario

Mon 9/28

5:15 pm-6:05 am

1 stop9h 50m

$357

Quickest round-trip

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Wed 9/23

7:20 am-12:14 pm

1 stop7h 54m

Ontario

Tue 9/29

6:00 pm-5:50 am

1 stop8h 50m

$357

PhiladelphiaOntario

PHL Philadelphia - ONT Ontario

PHLONT

Philadelphia

Fri 9/11

6:00 am-12:12 pm

1 stop9h 12m

Ontario

Sun 9/20

7:13 pm-7:49 am

1 stop9h 36m

$388

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 $310 to $416.
The lowest price recently found on this route was $258.

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 $358. 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 $427 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 5% 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 September 2026, prices for Philadelphia to Ontario flights are approximately 75% 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	$115
Fastest flight time	7h 19m
Direct flights	None

The best one-way flight to Ontario from Philadelphia in the past 72 hours is $115. The best round-trip flight deal from Philadelphia to Ontario found on momondo in the last 72 hours is $258.

The fastest flight from Philadelphia to Ontario takes 7h 19m

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 19m, 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 September 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 8,538 reviews	Search Delta flights
Frontier	PriceFrom $215	Free Cancellation	Rating 5.6 2,629 reviews	Search Frontier flights
United Airlines	PriceFrom $290	Free Cancellation	Rating 7.4 10,157 reviews	Search United Airlines flights
American Airlines	PriceFrom $316	Free Cancellation	Rating 7.1 12,023 reviews	Search American Airlines flights
Southwest	PriceFrom $347	Free Cancellation	Rating 8.0 4,191 reviews	Search Southwest flights

United Airlines Flights From Philadelphia to Ontario
United Airlines operates around 3 flights from Philadelphia to Ontario every week. The average price of these flights found in the last 72 hours has been $437, 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 10,151 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

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Thu 10/1

Thu 10/8

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Nearby airports

Airlines

Cabin classes

Other United States destinations

Other flights from Philadelphia

Complete your trip

Feeling lucky

Cheap flights from Philadelphia to Los Angeles from $115

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 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Philadelphia to Los Angeles

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Frontier flights from Philadelphia to Ontario

Our best Frontier deals on Philadelphia to Ontario flight tickets

United Airlines flights from Philadelphia to Ontario

Our best United Airlines deals on Philadelphia to Ontario flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Philadelphia to Ontario that are best for you.

See travel insights to Los Angeles from

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

Airports servicing California

Fly your favorite airline to Los Angeles

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Los Angeles

List of cabin classes available on flights landing in Los Angeles. Availability may vary depending on flight origin and airline.

Popular cities in the United States

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Philadelphia

According to popular flight searches on momondo this year

Complete your trip to Los Angeles

Explore popular destinations other users love

According to popular flight searches on momondo this year