Originally Posted by FlyerAl
Connecting between F and B/C (mainline gates) involves a bus ride, but that usually isn't too bad. The big problem at PHL is when it's backed up due to weather and delays can be very lengthy. Baggage is another issue - it often misconnects. The staff there is mediocre at best. Perhaps things are improving there...I haven't been through PHL since May.
Not sure how any of this applies to the OP. He's not making a connection, and any weather delays would also be experienced by AC. Additionally, US does have some mainline aircraft on the route which could make the OP's flights more comfortable.