Delta and SkyTeam partners have round-trip flights from Austin (AUS) to Zurich (ZRH) or Brussels (BRU) for $375 with a connection. Flights mid-October to mid-May. 7-day minimum stay required. Delta flight may operate as a KLM/Air France codeshare.
Note: Fare allows for a free carry-on bag, but a checked bag will cost +$60 each-way. Upgrades into “Regular Economy”, which allows for a free checked bag are available for +$45 each-way.
Note: New Years Eve is available if you can do a 10-day stay or longer.
Note: Flights to Brussels are sparse and scattered, but AA is starting to match fares on these dates for about $425.
Click for more details and booking links Cheap Flights: Austin to Zurich or Brussels $375 r/t – Delta / KLM