Delta and SkyTeam partners have round-trip flights from Austin (AUS) to Barcelona or Madrid (BCN/MAD) for $515-$525 with a connection. Flights November to March. Holiday blackouts apply. 7-day minimum stay required.
Note: Carry-on bag is allowed for free, but checked bags will cost about +$60 each-way. Upgrades into “Regular Economy”, which allows for a “free” checked-bag is available for +$45 each-way.