| Cheap Flights: Austin or San Antonio to Coxen Hole, Roatan, Honduras $409 r/t [April-May] â United United has round-trip flights from Austin or San Antonio (AUS/SAT) to Coxen Hole (RTB) for $409 with a connection. Flights April to May. Very few weekends available. A negative COVID test result is required for entry/return. Click for more details and booking links Cheap Flights: Austin or San Antonio to Coxen Hole, Roatan, Honduras $409 r/t [April-May] â United . | 