Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New Jersey to Philadelphia as you normally would.
To save up to 111% on this flight, we recommend booking at least 53 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from New Jersey to Philadelphia from $350 1-2 weeks out and tickets from $499 for flights departing within the next 72 hours.