i suggest visiting aa.com and delta.com for the info....

from the mainland [i don't know if sju is considered carib] the ug is 25k mi plus $250 each way except for q and o fare classes which is explained on aa.com

330 days in advance are when you can book awards or paid tickets...

tons of discussion on this...

perhaps you can search on 330 days or someone will lead you to the threads...

welcome to ft....