polargirl, why not overnight in Calgary on your way down, instead of Houston? (unless Continental is picking up the tab but maybe they will anyway, Cdn $ being a better deal) Catch the 7:00 a.m.ish flight to Houston and then to Belize City. I don't think that schedule has changed much. You still get to BZ City around 3:30.

A fish and a bird can fall in love, but where will they build their nest?