Online and airport check-in are the two check-in options that AeroMexico provides. To check in online, go to their website or mobile application, input your booking reference or ticket number, and then follow the on-screen instructions to finish the check-in procedure and choose your seats. Find the AeroMexico check-in desks or kiosks at the airport, present your reservation information or passport, and, if required, get help with check-in and baggage. Ensure you have the required travel documents. Online check-in is typically available 24-48 hours before departure; check specific guidelines for your airport and destination.