You can change your plans and your flight
Once the round trip has started, the passenger can change the time/flight on his return for the same day, respecting the date marked on the ticket. Valid only for previous or subsequent flights on the same day as the original reservation. Applies only when the round trip flight starts and ends the same day.
Applies to any fare class reserved and shown on the ticket. When changing the return flight, it should be reserved only in Class R. Subject to seat availability. Does not apply for date changes. Changes can only be made on the same day of flight in Telesales, Airport counters and Aeromar ticket offices.
Valid only for the following routes:
México – Colima
México – Tepic
México – Ciudad Victoria
México – San Luis Potosí