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.
For departures before 10 am, wait times are longer than usual at U.S. Customs and Border Protection (CBP) and Canadian Air Transport Security Association (CATSA) pre-board screening. You should arrive at the airport three (3) hours before your flight's scheduled departure time. Pre-board security screening for departures to the U.S. opens at 3:00 AM. â  Exception: 20 minutes for flights departing from Toronto City Airport (YTZ).