How far in advance do I need to arrive at the airport going from Fortladerdsle to Nashville?

2 hours

It should be 20 to 30 minutes before they have to departure

Between 2 - 3 h early

Should you have luggage it's best to get there 2hours before you flight.. You will have time to get your ticket, your luggage check in and go through TSA .. You have 3lines to get through.

A least 2 hours, remember that some times is a lot of people waiting in line for check in with the air line, plus customs check up