$160 Cheap United flights from Philadelphia to Ontario (PHL to ONT)

Find The Best Day To Fly from Philadelphia to Ontario

Amazing United PHL to ONT Flight Deals

The cheapest flights to Los Angeles - Ontario Intl. found within the past 7 days were $215 round trip and $160 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia

ONT

Ontario

$215

Roundtrip

found 6 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia

ONT

Ontario

$225

Roundtrip

found 6 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia

ONT

Ontario

$230

Roundtrip

found 6 days ago

Tue, Oct 21 - Thu, Oct 23

PHL

Philadelphia

ONT

Ontario

$240

Roundtrip

found 6 days ago

Mon, Sep 29 - Mon, Oct 6

PHL

Philadelphia

ONT

Ontario

$320

Roundtrip

found 1 day ago

Mon, Sep 29 - Mon, Oct 6

PHL

Philadelphia

ONT

Ontario

$325

Roundtrip

found 1 day ago

Wed, Oct 1 - Tue, Oct 7

PHL

Philadelphia

ONT

Ontario

$335

Roundtrip

found 6 hours ago

ONT From PHL Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.

Fox Bear Cottages Big Bear

per person

Aug 31 - Sep 4

found 1 day ago

Roundtrip non-stop flight included

Philadelphia (PHL) to Ontario (ONT)

N+P Boutique Lodge

Save 100% on your flight

per person

Aug 31 - Sep 4

found 1 day ago

Roundtrip non-stop flight included

Philadelphia (PHL) to Ontario (ONT)

Bluegreen Vacations Big Bear Village, Ascend Resort Collection

Save 100% on your flight

per person

Aug 31 - Sep 4

found 1 day ago

Roundtrip non-stop flight included

Philadelphia (PHL) to Ontario (ONT)

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Frequently asked questions

Can I catch a flight from Philadelphia Airport to Ontario Airport right now?

It's prudent to know about any quarantine requirements and travel advice reports in place in your destination city. Be sure to check out our Covid-19 Travel Advisor for up-to-date information on catching a flight to ONT.

What terminal is United Airlines at Philadelphia Intl. Airport (PHL)?

You should find out which terminal United Airlines operates from at PHL once you've seen your ticket. The same can be said for information about your arrival at Los Angeles - Ontario Intl. Airport (ONT). If those details are missing, ask your airline.

Are there United Airlines non-stop flights from PHL to ONT?

You won't find any direct flights from PHL to Ontario Airport with United Airlines. Be ready to make at least one stopover if you have to stick to this airline and route.

How long is a United Airlines flight from PHL to ONT?

As it will take roughly 6 hours and 43 minutes for your United Airlines flight to jet from PHL to ONT, think about throwing a couple of travel games in your carry-on bag. You never know --- the passenger sitting next to you might welcome the chance to play to break up the journey.

How many direct and indirect flights does United Airlines fly from PHL to ONT?

If you need to lock in a journey from PHL to ONT, you can pick from approximately 2 United Airlines flights each day.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to ONT, please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Philadelphia PHL to Ontario ONT

To find the best deals on flights to Philadelphia from Ontario with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.

Return flights from Philadelphia PHL to Ontario ONT with United

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $215 to $335, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply.

Book one-way United flights from Philadelphia PHL to Ontario ONT

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Philadelphia to Ontario costs from $160. Prices and availability subject to change. Additional terms may apply.

The easy way to find cheap flights to Ontario ONT from Philadelphia PHL with United

To find a cheap United flight from Philadelphia PHL to Ontario ONT, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference.

How to find our best airfare deals on United flights from Philadelphia PHL to Ontario ONT

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as October, or if you book a flight with a stopover.

Find nonstop flights from Philadelphia PHL to Ontario ONT with United

If you’re keen to be on Ontario soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it.

Flexible airline tickets for United flights from Philadelphia PHL to Ontario ONT

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.

There are a lot of reasons to book your flights to Ontario ONT from Philadelphia PHL with United on Travelocity

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Airport code	Country	Airport name	Number of flights
ORD	USA	O'Hare Intl.	227
DEN	USA	Denver Intl.	226
IAH	USA	George Bush Intercontinental	136
IAD	USA	Washington Dulles Intl.	100
SFO	USA	San Francisco Intl.	64
LAX	USA	Los Angeles Intl.	23
EWR	USA	Liberty Intl.	20
FRA	DEU	Frankfurt Intl.	19
NRT	JPN	Narita Intl.	19
PEK	CHN	Capital Intl.	16

Travelers ❤️ these 🏨 after their flight to Ontario

Ontario Airport Hotel & Conference Center

700 N Haven Ave, Ontario, CA

This hotel features an outdoor pool, a 24-hour gym, and a restaurant. Traveling on business? Take advantage of the 24-hour business center and free WiFi in public ...

8.6/10 Excellent! (2,852 reviews)

"you get what you pay for. We enjoyed our stay. The room was clean and spacious. Would stay again"

Reviewed on Jul 12, 2025

La Quinta Inn & Suites by Wyndham Ontario Airport

3555 Inland Empire Blvd, Ontario, CA

This hotel features an outdoor pool and a gym. Traveling on business? Take advantage of the 24-hour business center, free WiFi in public areas, and free airport ...

8.2/10 Very Good! (1,897 reviews)

"No issues for a one night stay. Always comfortable and the staff is helpful."

Reviewed on Jul 12, 2025

Ontario Airport Inn

1801 E G St, Ontario, CA

This hotel doesn't skimp on freebies - guests receive free buffet breakfast, free self parking, and a free airport shuttle. Traveling on business? Take advantage ...

8.6/10 Excellent! (1,567 reviews)

"I had a great time at this place. It was peaceful."

Reviewed on Jul 15, 2025

Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.