From Beauvais Airport bus to Porte Maillot, line 1 Metro to Champs-Élysées Clemenceau, line 13 Metro to Paris Montparnasse, then train to St-Pierre-des-Corps. 2hrs 41min 62 €. From Beauvais Airport bus to Neuilly Porte Maillot, Palais des Congres, RER to Paris Austerlitz, then train to Tours. 3hrs 56min 60 €. From Beauvais drive to Tours. 3hrs 45min 46 €.