it's easy as ABC....i suggest you book your flight online - try to get to ur terminal 2 hrs early on the day of the flight - if ur going with Air Jamaica go to their check-in line with ur passport(if it's not US bring ur green card with u too) and ur bag(s) and right after that they'll give ur boarding pass and u just have to go through security of course and OFF YOU GO.Hope that helps
it's easy as ABC....i