| Cheap Flights: Austin or San Antonio to Belize City $284-$294 r/t [October-August] â United / American Airlines / Delta United, Delta, and American Airlines have round-trip flights from Austin or San Antonio (AUS/SAT) to Belize City (BZE) for $284-$294 with a connection. Flights October to August. Weekends available. Carry-on bag is allowed for free on Delta and American. United segments have a bag fee. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate. Click for more details and booking links Cheap Flights: Austin or San Antonio to Belize City $284-$294 r/t [October-August] â United / American Airlines / Delta . | 