Frequent flyer

If you are traveling to any of the Caribbean Islands frequently for business or pleasure, you might be allegable for a frequent flyer program. There are many airlines that have their own frequent flyer program, allowing you to save the amount of miles you flew with them.
These "miles" can then be used to upgrade your ticket to a higher class on that airline or even book a ticket with them. Several airlines are part of a "bigger reward" plan.