I am so confused. We will be flying into Rome from Atlanta on Delta and then transferring to an Alitalia flight to Milan.

I have been told that we will arrive at terminal 5 but then I saw that terminal 5 is for departures only and that we will arrive at terminal 3.

Luggage will be ticketed all the way through but we have only 1 hour and 20 minutes between flights. Will that be enough to clear customs and immigration?

Thanks,
rangercarol