Just tried to book PHL-FCO in January (10th to the 20th). Got a message that there are no flights between my city pair. Oh well. So much for an easy fix.
I know all the flight numbers were being changed.. so that may be some of the issues.. Here is what came up today:
6PM Flight 1402 PHL-FCO Jan 10
11:30AM Flight 1403 FCO-PHL Jan 20
Total: $707 RT
So I think the problem is the whole change-over of the flight numbers and new schedule..... not an excuse but possible cause.