| Cheap Flights: San Antonio to/from Seattle $153 r/t [April-May] â American Airlines American Airlines has round-trip flights from San Antonio (SAT) to Seattle (SEA) for $153 with a connection. Flights April to May. Very few weekends available. Origin/Destination reversible. Click for more details and booking links Cheap Flights: San Antonio to/from Seattle $153 r/t [April-May] â American Airlines . | 
