I am arriving on a Saturday afternoon at terminal 3 on a Delta flight from Indianapolis, and departing for Rome, Italy on New Alitalia probably terminal 1. Will I have to collect my checked bags and go through security again? I only have 1 hour and 35 minutes between flights. How much time is required to walk between terminal 3 and 1 versus the airtrain? Thanks
time required from terminal 3 to terminal 1