Originally Posted by
theroyalwe
I also want to make sure I pick an airline that I'll have a lot of options to fly out of PHL.
https://www.phl.org/Pages/Flight-Information.aspx Which go where you want to go? Connecting will get you more miles/status but will take more time
Airline ffp's have alliance & non alliance partners. Some airlines are not in an alliance. For example AA & DL are both Alaska AS partners