| Nonstop Flights: San Antonio to/from Mexico City $170-$220 r/t [April-October] â Aeromexico Aeromexico has round-trip flights from San Antonio (SAT) to Mexico City (MEX) for $170-$220, NONSTOP. Flights April to October. Weekends available. Origin/Destination reversible. Click for more details and booking links Nonstop Flights: San Antonio to/from Mexico City $170-$220 r/t [April-October] â Aeromexico . | 