The Institute of Medicine released two seminal reports in 1999 and 2001.The first report, To Err is Human: Building a Safer Health System released in 1999 received enormous publicity and focused attention on the issues of medical error and patient safety.
The general rule of thumb is that one is supposed to arrive. 1  2 hours early for a domestic flight and. 2  3 for an international flight.
If you feel you need to, please allow yourself extra time to get to the airport and to get from the entrance of the airport to your particular departure gate. United recommends that passengers arrive at the airport an hour prior to all flights within the U.S. and two hours prior to all international flights.