Originally Posted by
GoCats67
On the good news front, remember that pax don't get free upgrades since PUJ (and other destinations) is intl.
Actually, they do. The Complimentary Premier Upgrades apply to the Caribbean.
https://www.united.com/ual/en/us/fly.../upgrades.html
I think you see more open FC seats on Caribbean flights because there are much fewer Premier members on those flights.