| Nonstop Flights: San Antonio to/from Mexico City $224-$239 r/t [February-June] â Aeromexico / Delta Aeromexico and Delta have round-trip flights from San Antonio (SAT) to Mexico City (MEX) for $224-$239, NONSTOP. Flights February to June. Weekends available. Origin/Destination reversible. Click for more details and booking links Nonstop Flights: San Antonio to/from Mexico City $224-$239 r/t [February-June] â Aeromexico / Delta . | 