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.
Some sources such as Los Angeles International Airport and American Airlines advise customers to arrive only two hours early for most international flights. American Airlines lists some international destinations such as Mexico and the Carribean for which passengers should arrive three hours early. Thinkstock/Stockbyte/Getty Images.