The Beatles traveled from Atlantic City, NJ to Philadelphia, Pennsylvania by bus and that is why ther aren't any photographs of them departing from an airplane in Philly.
Just five days prior to the Beatles arrival, Philadelphia experienced rioting in the streets of North Philly. John was particularly shocked and upset by the photographs of the police and their dogs among the people in the streets. Being from the St. Louis area and only 20 minutes from Ferguson, Missouri--I can relate a bit to this more than I could ever before. But there was no talk of riots at the Philadelphia press conference on September 2, 1964! It was all about schmoozing with the WIBBAGE radio DJ's, having Beatles cake, and drinking some soda while answering the same questions.