[06/07/2015 @ 1:16 PM] Sale is probably over. I’m seeing that most airlines no longer offer this discount fare.
American Airlines has round-trip flights from Austin (AUS) to Madrid (MAD) for $784 with a connection. Flights September to January 2016. MON-WED departures/returns are cheapest.
New Years is available: Dec 29 – Jan 05’2016 for $829 round-trip.