Port of Spain to Grenada

I fly with Liat airlines from Port of Spain to Grenada, I am not clear on the airport in Grenada, however I will leave tomorrow wednesday about 9:50 in the morning.

The biggest problem with the flights here is how to get to the Airport cheaply, it could almost cost as much for the Taxi as the Airfare. This is always missing from many explanations, this is the complicated part of entering and leaving a city. How to get from the Airport to the cheap hotel center.