If you're wondering how long flights to Philadelphia are, consider where you'll be flying from and if you'll be flying nonstop. If your plane tickets to Philadelphia are non-stop flights from Atlanta, for example, it will take you about two hours. It can take up to three and a half hours if you have connecting flights with stopovers in towns like Norfolk or Raleigh. Your nonstop flight from Los Angeles to Philadelphia will take approximately five hours. However, if your flights to Philadelphia includes stops in Las Vegas, Detroit, or Chicago, the journey might take up to six and a half hours.