Upvote:4
I have never personally been through FCO, but based on experience from multiple trips to ATH from the US transiting through various places in Europe, the overall arrangement will be:
Upvote:6
Is there transit side immigration or do we go through immigration with those staying in Italy?
I've never been to FCO, but I can say that in some Schengen airports there are multiple immigration checkpoints depending on where you're going, and in others there aren't, so it could be either way.
Regardless, you don't need to be concerned about this except as a matter of curiosity. Just follow the signs to your gate and by doing so you will be guided to the correct immigration checkpoint: upon your arrival, you will be in a non-Schengen part of the airport, and your departure gate will be in a Schengen part of the airport, and you can't pass from one part to the other without going through passport control.
If for some reason your plans change and you check a bag, you won't see the bag in Rome. You will retrieve it in Athens. The customs checkpoint is after baggage claim. Even if you don't check anything, you will have to walk through the baggage claim hall to leave the airport. You should choose the red channel if you have something to declare and the green channel if you don't. The blue channel is for people who are arriving from another EU country, which (despite the transfer in Italy) you are not.
Upvote:9
Both Greece and Italy are part of the Schengen Area, this means that your FCO-ATH flight is an intra-Schengen flight, so you will go through immigration at your first point of entry, which is Rome (FCO) here
You will go through customs in Greece though, as the customs are behind the baggage claim, and you will not claim your bag in Italy