Had a great trip to Europe for the entire month of June and Rick by our side the whole time. Not a glitch until trying to get back to the States from Rome.
We received some advice to take to train out of Ostiense rather than Termini to save time, some carfare and easier access from the Aventine. Bad choice...the train (due to a labor slowdown) was over 2.5 hours late. Apparently the express trains from Termini were not affected.
The Roma airport when trying to get to the USA is indescribable. Be prepared for lots of lines, if they can be so described. After you check your luggage, another herd of about an hour is ahead of you.
We allowed 4.5 hours and still ended up running to the plane. Best advice...train out of Termini to Fiumincino and then be prepared for some of the biggest waits you'll experience in Europe. Knowing ahead of time may ease some stress.