ONT to PHL from $354 in economy – flightdeals.net

Home Premium Fare Deals About

United Airlines

UAUnited Airlines

Round Trip•Economy

Ontario International Airport

Ontario, United States

Philadelphia International Airport

Philadelphia, United States

$449 USD

-21%$354 USD

Verified 13 days ago

September 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$354 1$354 2$354 3$432 4$438 5$354 6$354 7$432 8$432 9$354 10$354 11$354 12$354 13$354 14$354 15$354 16$383 17$354 18$354 19$354 20$354 21$383 22$354 23$354 24$354 25$354 26$354 27$432 28$383 29$354 30$354 1$354 2$354 3$354 4$391

Good Availability

50% of dates checked are available within 10% of the lowest price

Friday, September 25th, 2026

5 round-trip options

Returning

Wed, Sep 30, 2026•5 Day Trip

$359 USD

Returning

Thu, Oct 1, 2026•6 Day Trip

$354 USD

Returning

Sat, Oct 3, 2026•8 Day Trip

$359 USD

Returning

Wed, Oct 7, 2026•12 Day Trip

$393 USD

Returning

Fri, Oct 9, 2026•14 Day Trip

$503 USD