Direct Flights from Allentown to Philadelphia

It takes about 1 hour 41 minutes to fly from Allentown to Philadelphia.

By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Allentown to Philadelphia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

The cheapest months to fly from Allentown to Philadelphia is October, when demand for travel is lower.

After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Allentown to Philadelphia on December 25, 2025 with United Airlines, with prices starting at £350.

The time difference between Philadelphia and Allentown is 0h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.