checking in at Delta or Latam?
 

I booked a flight to Lima from JFK on the Delta website and the flight is on Latam metal. Do I check in at the Latam counters, or can I do it at the Delta counters? I am sky Priority on Delta, will I also have that privilege on Latam? TIA

If your flight's on LATAM metal, you need to check in at the LATAM desk, unfortunately. With Sky Priority you should be able to use the Premium Access check-in line.

With few exceptions always checkin with operating carrier.

There's no such thing as being SkyPriority on DL. Do you mean you are an elite with DL? If so depending on level you will get those same type privileges with LA.