Delta has round-trip flights from Austin (AUS) to Shannon, Ireland (SNN) for $573 with a connection. Flights in August. 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.
British Airways, Aer Lingus, Finnair, Iberia and various other airlines have round-trip flights from Austin (AUS) to Shannon (SNN) for $598 with a connection. Flights September to March. Departures on Monday, Tuesday, Wednesday, and Sunday. 7-day minimum stay required. The outbound flight has a long 5-hour connection in London.
