Originally Posted by
Mavalenzu
SDC in LAN are indeed allowed in the airport in the same day, at the airport. Just go to a check-in counter and ask them. If someone tells you this is not allowed, go to another counter.
Yes, I have even been offered same day alternate routing without asking (was doing a weird MR thing

).
I know they are really flexible on the LIM-CUZ route anyway, for obvious reasons, so OP SDC possible.