Many people ask about Aeromexico check in Policy Passengers may check in online through AeroMexico's website or mobile app up to 48 hours before to takeoff. At specialised counters and kiosks located at the airport, check-in is possible. Before boarding an overseas aircraft, passengers should arrive with enough time to spare and with proper travel documentation. According to the airline's luggage regulations, checked baggage is accepted. Verifying precise check-in guidelines and dates is crucial because they can change depending on the airport of departure and the final destination.