Transit question

Which airlines are your flights on?

Any possibility of you doing carry on only?

Three hours and fifteen minutes is cutting it very close for an unprotected connection with checked luggage with the second flight being one to the United States. Most people I know arrive at CDG three hours before their outbound flight to the US. If the two airlines are in an alliance, they might do the luggage transfer but odds are the answer is no. The only way to know that is to call and ask the airline. There is always a way to ask. You just might not get the answer you want. Is there any way to take an earlier flight to CDG from Florence or even arrive the day before? If you miss the flight to the US, will the airline book you on a subsequent flight without you having to buy a last minute ticket? If they will not, consider arriving the day before or five or six hours before the scheduled departure of your US-bound flight.

Given the date of the flight from both a potential weather disruption aspect and the crush of Christmas Eve travelers, I once again have come to mind the saying regarding a snow balls chance in Satan's domicile.

I see 3 options that could lead to success:

1- Change flight(s) to make more time in between them

2-Condense to have only carry luggage

3- Prayer 🙏 🙏 🙏 🙏 🙏 ......

IF everything works perfectly you could make your current itinerary work, but it is not the type of drama I would want..

Others who travel through CDG on a frequent basis may have some practical advice to offer if you identify which airlines are involved ( provide insight into which terminal(s) might be involved)

Not enough time. Luggage alone can easily take a half hour or more at CDG. You should be in line for a US flight 3 hours ahead. ANd late flights are common especially in December with poor weather.

You probably make it if your flight is on time, but there is a risk. But many domestic flights are not on time. For example. My flight from Berlin to CDG was late much of the time. If I had not changed the connection to Amsterdam, I would have missed the flight about half the time (this was on a connecting not separate flight). If your Florence CDG flight is late, you may have luggage delays as well making it dicey.

Take a look at the on time record of your Florence flight.. If I were you I would take a flight the previous day since it is a separate flight. Be in the city of a high stakes flight the evening before.

Thank you so much everyone for all the advice. I would rather flying in a day earlier than missing my flight to the US. Since I’m coming back from Florence, I will probably be doing some shopping, so I will be checking in luggage.
I think it’s so much better if I just fly in the night before. It will give me a piece of mine during my holiday.

Smart move. It isn't enough to 'probably make it' when the consequences of missing the flight are so high. In decades of travel we have had trains hit people on the tracks and come into Paris 5 hours late, planes cancelled, a tram break down on the way to the train station so we had to run with luggage the last half mile, traffic jams on the highway that kept us bottled up for hours, and lots of late planes. When the stakes are high you want to be conservative and not count on everything going perfectly.