Want to fly from JFK to the Caribbean in October or November for under $198 round trip, excluding taxes? JetBlue is adding three more Caribbean destinations in October: JFK-Barbados (October 1); JFK-St. Lucia (October 26) and JFK-Kingston (October 30). Taxes inflate fares a bit, but your lowest round trip fare to St. Lucia, for example, will come in under $285. (See screen grab below). I'm happily surprised by this expansion. It will be interesting to see how these routes do, how low fares remain, and the degree to which Jet Blue's further saturation of the region will affect fare pricing on other carriers between New York and the Caribbean.