You may check-in online or at the airport.
At the Airport
For international flights, you may check in 3 hours before departure. This allows you ample time to check in your bags and go through security.
Online check-in allows you to check the status of your flight, select/change a seat, update your contact information, and add emergency contact before you get to the airport. Most airlines allow online check-in from 24 hours before departure. Your can check in from your computer or through an app on your mobile device. Choose the airline you wish to check-in with: