Online check-in Jetair Caribbean - https://www.check-in.site

I'm sorry, but as of my knowledge cutoff in September 2021, there is no information available about an airline called "Jetair Caribbean." It's possible that the airline was established after that date or operates on a local or regional level. I recommend checking with recent online sources or contacting local travel agencies or airports in the Caribbean region for the most up-to-date information on airlines operating there.