Originally Posted by
3Cforme
I do have some data and insight. Delta at JFK moved 1 1/4x times the number of international passengers as all carriers combined at PHL last year. If Delta can't make year-round work at JFK with a SkyTeam partner, AA at PHL has no chance.
Carriers don't publish RASM by route. Full planes at cheap fares don't mean much.
Anecdotal reports are the flight is heavily supported by leisure traffic, which is highly seasonal.