The international airport of Bordeaux-Mérignac has connections to several European cities. Many daily connections to Paris Orly Airport and Roissy Charles de Gaulle Airport. From Bordeaux-Mérignac, you have two possibilities:
Rent a car (wide choice) at the airport.
Take the bus to the Bordeaux St-Jean Railway Station, and then the regional train (TER) to Barsac.
To get information about the airport and car rentals at the airport, please click here.