Cheap Flight Tickets from Ontario (ONT) to Philadelphia (PHL), Starting at $540

Good to Know: Cheapest and Fastest ONT - PHL Flights

Useful information for finding best airline tickets from Ontario International to Philadelphia International on your next trip.

Cheapest Round Trip Flight

$540

F9 Frontier Airlines • 1 stop • 13h 32m

Aug 11 – Aug 17

The cheapest round trip flight from Ontario to Philadelphia (ONT-PHL-ONT) is currently $540

🔍 Search Flights

Fastest Flight

12h 6m

The fastest nonstop flight from Ontario to Philadelphia (ONT-PHL) takes 12h 6m

Top Airlines Flying from Ontario to Philadelphia

Delta Airline, DL

Delta Airlines

United Airlines, UA

United Airlines

Latest Flight Deals from Ontario (ONT) to Philadelphia (PHL)

Compare and book low fare round-trip air tickets from Ontario to Philadelphia. Ideal for travelers with confirmed return itineraries.

Aug 11 - Aug 17, Economy
F9
Ontario → Philadelphia
13h 32m
8:17 AM - 7:29 PM • 1 stop
F9
Ontario → Philadelphia
12h 28m
11:06 AM - 3:54 PM • 1 stop
$540
Frontier Airlines
Aug 11 - Aug 17, Economy
F9
Ontario → Philadelphia
17h 31m
4:09 PM - 6:00 AM • 1 stop
F9
Ontario → Philadelphia
27h 7m
8:37 PM - 10:04 AM • 1 stop
$540
Frontier Airlines
Aug 11 - Aug 17, Economy
UA
Ontario → Philadelphia
12h 6m
1:18 PM - 11:44 PM • 1 stop
UA
Ontario → Philadelphia
15h 12m
6:00 AM - 12:12 PM • 1 stop
$755
United Airlines
Aug 11 - Aug 17, Economy
DL
Ontario → Philadelphia
14h 2m
12:00 PM - 11:42 PM • 1 stop
DL
Ontario → Philadelphia
12h 37m
12:36 PM - 5:33 PM • 1 stop
$803
Delta Airlines
Aug 11 - Aug 17, Economy
DL
Ontario → Philadelphia
15h 53m
7:05 AM - 7:58 PM • 1 stop
DL
Ontario → Philadelphia
12h 37m
12:36 PM - 5:33 PM • 1 stop
$803
Delta Airlines
Aug 11 - Aug 17, Economy
DL
Ontario → Philadelphia
12h 9m
7:05 AM - 5:34 PM • 1 stop
DL
Ontario → Philadelphia
12h 20m
6:15 AM - 10:55 AM • 1 stop
$803
Delta Airlines

Fly from Ontario to Philadelphia with the Best Airfare Deals on FareLeaders

Looking for a cheap last-minute deal or the best round-trip flight from Ontario to Philadelphia? Find the biggest savings on one-way and round-trip tickets right here.

FAQs on Ontario to Philadelphia Flights

What are the airports in Ontario?
ONT
What’s the most popular airline flying from ONT to PHL?
The most popular airline flying from Ontario to Philadelphia are
Can I fly from ONT to PHL non-stop?
NO
Which airlines fly nonstop between Ontario and Philadelphia?
The non-stop flights between Ontario and Philadelphia are .
What’s the earliest departure time from ONT to PHL Airport?
The earliest flight leaves ONT at 7:05 am and lands in PHL - Philadelphia International
What are the airports in Philadelphia?
PHL
Can I make changes to my Ontario to Philadelphia flight tickets or cancel them on FareLeaders.com?
No. We are an airfare comparison site. All the tickets are booked by the travel agent offering the flight deal and any changes or cancellations to be made are directly done directly by them or the airlines.
Can I cancel my flight tickets from ONT to PHL?
Read the fare rules of the Ontario to Philadelphia air tickets booked. Some airlines allow you to cancel the tickets within a stipulated time period with a cancellation fee.
Which airline alliances offer flights from Ontario and Philadelphia?
operate flights between Ontario and Philadelphia
How long does a flight from Ontario to Philadelphia take?
It takes approximately 5 hour to fly non-stop from ONT to PHL, which is 2355.69 miles by air.
Which airlines provide the cheapest flights from Ontario (ONT) to Philadelphia (PHL) ?
In the past couple of days, the cheapest tickets to PHL from ONT were found on F9 : USD 540
Do I need a passport to fly between ONT and PHL?
No
What’s the latest departure time from ONT to PHL ?
The last flight leaves ONT at 4:09 pm

Ontario (ONT) to Philadelphia (PHL): Airport Information

Origin Airport Ontario International , Ontario, US
Destination Airport Philadelphia International , Philadelphia, US
Distance 2356 miles

More Flight Options for Ontario (ONT) and Philadelphia (PHL)

Why Fareleaders for ONT to PHL Plane Tickets

Lowest Prices
Lowest Prices
Uncover the best deals on Ontario to Philadelphia flights by comparing fares from hundreds of airlines and agencies.
New Deals
New Deals Everyday
Get the best prices on ONT to PHL flights—we update our fares daily so you never miss a saving.
Best Travel Options
No Service Fees
Compare hundreds of Ontario to Philadelphia flights and secure the best deals—we never add any service fees.
Get Fare Drop Alert
Be the first to know when fares drop for the Ontario (ONT) to Philadelphia (PHL)
Terms and Conditions*