| Cheap Flights: San Antonio to Tokyo $492 r/t [September-March] â American Airlines / United United and American Airlines has round-trip flights from San Antonio (SAT) to Tokyo (HND/NRT) for $492-$493 with a connection. Flights September to March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required. COVID travel restrictions are still in place but this may be worthwhile for the dates later this year and next year. United fare allows for free changes / cancellation. Click for more details and booking links Cheap Flights: San Antonio to Tokyo $492-$493 r/t [September-March] â American Airlines / United . | 