Here's the deal: Yes, your metabolism affects your size, and the faster your personal motor runs, the more calories you'll burn. But the truth is, a slow metabolism isn't the real reason you're packing on pounds. You are the reason.
As a general rule, arrive at the airport no later than two hours before your domestic flight is scheduled to depart. This is somewhat later than the typical suggestion of three hours for an international flight.
They suggest that you get to the airport between 3 and 2 hours prior to your departure time-You want to make sure that you have plenty of time to get through security and customs and the lines can be long for both and you wouldn't want to miss your flight.