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

Sunday, October 18th, 2026

5 round-trip options

Returning
Fri, Oct 23, 2026•5 Day Trip
$664 USD
Google Flights
Returning
Sat, Oct 24, 2026•6 Day Trip
$633 USD
Google Flights
Returning
Mon, Oct 26, 2026•8 Day Trip
$661 USD
Google Flights
Returning
Fri, Oct 30, 2026•12 Day Trip
$628 USD
Google Flights
Returning
Sun, Nov 1, 2026•14 Day Trip
$628 USD
Google Flights