American Airlines has round-trip flights from Dallas (DFW) to Belize City (BZE) for $359, NONSTOP. Flights April to May. Departures on Monday, Tuesday, Wednesday, and Sunday. Origin/Destination reversible.
A Carry-on bag and also a personal item is allowed for free on American. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.
Read More Nonstop Flights: Dallas to/from Belize City $359 r/t [April-May] – American Airlines