Latam change flight allows passengers to make changes to their reservations without incurring a change fee. However, the new itinerary must be within the same region (South America, North America, Europe, or Oceania) as the original booking. Additionally, changes must be made at least 24 hours prior to the scheduled departure time of the original flight.
https://www.flightzticket.com/....blog/change-latam-ai