Air France, Delta, and Virgin Atlantic have round-trip flights from Austin or San Antonio (AUS, SAT) to London, United Kingdom (LHR) for $653-$680, Austin flights have both NONSTOP routes and routes with connections. Flights September to March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required.
A Carry-on bag and also a personal item is allowed for free on Delta. You can avoid paying for seat selection by accepting the randomly assigned seat at the gate.