how many AA or other flights are there from DFW to PHL every day? That would be the question to find out. multiple ways to do that, let me know if you need help figuring that out.

if there are a lot of flights then it shouldn't be that bad. I'm in ATL, have lots of flights to PHL so I believe mine isn't going to be bad but I'm in training and not doing it yet so time will tell.