Except for Florida, there is no warm weather place that is 3 hours.

You are not guaranteed warm weather in Florida.


These will be about 4 hours:
US Virgin Islands
Puerto Rico
Aruba/Curacao
Rivera Maya


It is high season so it is hard to do cheap at that time. Mexico may be your best bet.

My two sisters and I would like to go someplace warm for 2-3 nights (long weekend) in January or February. One will travel from Boston and the other two from DC.

Priorities:
Warm weather
Short-ish flights (ideally 3 hours or less - but the Boston sister may need to accept a longer flight)
Not too expensive - we don't want to cheap out at the expense of a good time, but don't need the Ritz either
Good food, relaxing atmosphere

Any ideas? I've never done this sort of thing so could use some ideas.

Thanks in advance!