Delta has round-trip flights from San Antonio (SAT) to Bogota, Colombia (BOG) for $299 with a connection. Flights May to June. Departures on Monday, Tuesday, Wednesday, Thursday, and Sunday. No Fridays or Saturdays. Very few extended weekends available.
A Carry-on bag and also a personal item is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.