I agree with the last thread posting from OSFLYER. If your not flying during Easter period you should be ok. I work for US. Last year I went to FCO from PHL. I did get bumped as I expected as I left on a Friday. I ended flying to AMS and then KL to FCO. KL has several flights throughout the day. Returning from FCO, I had no problems getting to PHL directly on US. Here is the what I suggest. Get back up tickets for FCO-FRA on LH, FCO-PAR on AF, FCO-AMS on KL, and FCO-LHR on BA. All these airlines have several flights to their respective hubs from FCO. You do not have get back ups for every market, but it helps in the event if you get stuck at FCO. I always heard about FCO being difficult so I just prepared myself for plan "B" in the event I getted bumped. The best days to fly to/from FCO are midweek.