Originally Posted by jlarroulet

no fast track for business class passengers of any airline at immigration.
You'll be on a tight connection and you'll get to LIM at rush hour, so my very first advice is to try to get off the plane as quickly as possible and walk fast to immigration.

INT-DOM connections at LIM require you go through immigration and customs at LIM, then go landside to recheck your bags and then walk to the other side of the terminal to re-clear security. Even though you're within the MCT, move quickly

If both segments are on the same ticket, you're covered and LATAM should rebook you in case you miss the connection. If you're on separate tickets, you're pretty much on your own.