| Cheap Flights: Austin or San Antonio to London or Manchester United Kingdom $504-$543 r/t [September-February] â Delta / Virgin Atlantic Delta and Virgin Atlantic have round-trip flights from Austin and San Antonio (AUS, SAT) to London or Manchester United Kingdom (LHR, MAN) for $504-$543 with a connection. Flights September to February. Extended weekends available. Manchester is cheaper to fly to than London. Click for more details and booking links Cheap Flights: Austin or San Antonio to London or Manchester United Kingdom $504-$543 r/t [September-February] â Delta / Virgin Atlantic . | 