TrueBlue deals: Spring flights to Mexico, Caribbean for as little as 4K points one-way

If you’re in the market for a warm-weather destination in the final weeks of winter or plotting a spring break trip, you may want to check your stash of JetBlue TrueBlue points. JetBlue is offering some pretty intriguing late winter and early spring deals to places like Mexico, the Caribbean and Central America. In some …