Ontario (ONT) to Philadelphia (PHL) flight deal in economy from $354

United AirlinesUAUnited Airlines
Round Trip•Economy
United StatesONT

Ontario International Airport

Ontario, United States
United StatesPHL

Philadelphia International Airport

Philadelphia, United States
$449 USD
-21%$354 USD
Verified 13 days ago
Good Availability
50% of dates checked are available within 10% of the lowest price

Thursday, October 1st, 2026

5 round-trip options

Returning
Tue, Oct 6, 2026•5 Day Trip
$359 USD
Google Flights
Returning
Wed, Oct 7, 2026•6 Day Trip
$393 USD
Google Flights
Returning
Fri, Oct 9, 2026•8 Day Trip
$503 USD
Google Flights
Returning
Tue, Oct 13, 2026•12 Day Trip
$391 USD
Google Flights
Returning
Thu, Oct 15, 2026•14 Day Trip
$354 USD
Google Flights