Most airlines recommend passengers check in for their flights 60 to 90 minutes before departure. Allow additional time for parking, getting to the terminal and waiting in line for check-in and security.
Allow for Additional Time
Holidays and Mondays are the busiest times in airports. Expect and allow additional time for traffic, parking and long lines at check-in and security check points. Some airports will not check baggage less than 45 minutes before departure.
Expect delays and arrive at the airport at least 90 minutes before departure. Get there earlier if parking in a remote lot, travelling during busy times or checking baggage.