The correlation should be for which airports have the most flagship service flights, which PHL has never had any. But if they were building a lounge then it leads me to believe that marketing some routes would follow..
MIA has a lot of international destinations, but they don't all have flagship service. LAX has just LHR a few times per day as a passenger flight with FS, but also has JFK, BOS and MIA that also have FS.
PHL currently has 5 European routes, but none offer flagship service at the moment. Prior to the pandemic, PHL had 2x+ that many European routes in peak season
Huh? Any AA international long-haul flight is “flagship” service, and all business class passengers on those flights are entitled to use the Flagship Lounge where available. PHL was one of the later airports to get a FL probably because there wasn’t as much of a competitive reason to offer the better lounge experience. Certainly pre-pandemic there was a ton of long-haul international “flagship” service from PHL. Are they really not even serving PHL-LHR now?