When you book flights with Aeroméxico, you won't have to worry about last-minute cancellations interrupting your vacation plans. It is important to understand the following points before requesting the cancellation of your Aeroméxico ticket:

For all domestic and international short-haul flights, Aeroméxico has eliminated cancellation fees for First, Business, Premium Economy and Economy Class.
If your plans change, you can request cancellation from Aeroméxico and keep your original price value. You will still be responsible for the cost difference if your new trip is more expensive.
Flights booked through aeromexico.com, Aeromexico contact centers or airport kiosks will be subject to Aeromexico "flight cancellation" demands.
Aeromexico's cancellation policy applies to both restricted and unlimited fares.
Aeroméxico will credit the refunds to the original payment method within 710 business days after the cancellation of the flight.
Passengers flying Basic or Value fares affected by Aeroméxico ticket cancellation due to weather or government travel restrictions may request a refund of their tickets.
https://www.changebooking.com/blog/aeromexico-cancellation-policy