It's important to get to the airport well in advance of your flight time in order to give yourself ample time to check-in, drop off your bags, and get through airport security.
For domestic flights - at least 2 hours in advance of boarding time.
For international flights - at least 3 hours in advance or boarding time.
Good to know
If you are traveling with family or need additional assistance checking in and boarding, consider adding additional time.
If you are denied check-in due to late arrival to the airport, the airline may cancel your ticket and require that you purchase a new ticket to travel.