To join Poitiers from abroad, it is usually easier to arrive first in Paris and then take a TGV train to Poitiers.
• Poitiers Airport
The aiport of Poitiers-Biard is a local airport, with domestic connections and low-cost international flights. The airport is connected to Lyon International Airport Saint-Exupéry, which has regular flights to Stuttgart, Zurich, Frankfurt, Munich, Venice, Bologna, Rome, Milan and Barcelona, among others.
For more information: aéroport de Poitiers-Biard 
• By train, Poitiers Station
Poitiers is situated on a high-speed TGV line. Poitiers is 1h30 from Paris-Montparnasse (12 daily departures), 2h15 from Paris-Charles de Gaulle (5 departures per day), 1h45 from Bordeaux.
For more information:: SNCF
Maps and addresses of University Campus: Université de Poitiers