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.
We recommend you arrive at the airport at least two hours before your flight departs. That way you will have enough time to check in, drop off your baggage, pass the immigration and security checks and reach your boarding gate.