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.
How early should I arrive at the airport before my flight? The Transportation Security Administration (TSA) recommends that you arrive at the airport two hours prior to the departure time for domestic and three hours prior to international flights. We encourage passengers to give themselves additional time during peak travel periods and inclement weather.