I imagine that the concern is over Tropical Depression no 9. This is it's current forcast cone. While I am not a meterologist, living in South Florida we all have become amateur meterologists. Hurricane threats are a part of life down here. First off I want to say don't stress it because these forecasts have the shelf life of milk in the sun. This will change. This forecast cone will change a dozen times before it becomes a threat, if it even becomes a threat. As someone else said, flights don't get affected unless it hits during your flight window. The airports will be open right up until weather conditions begin to deteriorate. Right now it is not expected to become a major hurricane (111mph winds). Also it would have to cross eastern or central Cuba which is a mountainous area. This will weaken it if it does become a threat. Also any shift to the north or east will bring it over Hispañola which is even more mountainous than Cuba and will cause even more weakening. Unfortunately we are entering the peak of the Hurricane Season. For right now monitor it. Contact your airline and the your hotel and find out what how they handle this so you know what to do.