According to its 24 hour scratch-off method, Aeromexico allows you to cancel your flight tickets within around 24 hours of your purchase and additionally provides you with a complete discount for something relatively comparable. In a different scenario, As per Aeromexico 24 hour cancellation , if you cancel your Aeromexico flight reservations within 24 hours before the flight's scheduled departure time, which is 7 days in advance, you will still be responsible for paying the airline's flight scratch-off