United has round-trip flights from Houston (IAH) to San Jose, Costa Rica or Belize (SJO, BZE) for $317-$335, NONSTOP. Costa Rica flights September, October, November, January, and February. Belize flights September to March. Origin/Destination reversible. No Thanksgiving dates.
The United Belize fare is slightly cheaper than the Southwest fare that I mentioned earlier today, but has a carry-on bag fee, so overall more-expensive unless you can card-perk your way around it.
United’s “Basic Economy” fares do not allow for a free carry-on bag.


