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 14 days ago

December 2026

Mon

Tue

Wed

Thu

Fri

Sat

Sun

30$521 1$354 2$354 3$354 4$354 5$354 6$419 7$354 8$354 9$387 10$476 11$451 12$516 13$419 14$387 15$423 16$627 17$473 18$436 19$710 20$634 21$473 22$721 23$440 24$391 25$359 26$440 27$413 28$354 29$436 30$354 31$354 1$441 2$529 3$494

Good Availability

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

Tuesday, December 15th, 2026

4 round-trip options

Returning

Mon, Dec 21, 2026•6 Day Trip

$548 USD

Returning

Tue, Dec 22, 2026•7 Day Trip

$664 USD

Returning

Thu, Dec 24, 2026•9 Day Trip

$423 USD

Returning

Sat, Dec 26, 2026•11 Day Trip

$836 USD