From Beauvais Airport bus to Porte Maillot, line 1 Metro to Champs-Élysées Clemenceau, line 13 Metro to Paris Montparnasse, then train to Tours. 3hrs 33min 58€. From Beauvais Airport bus to Neuilly Porte Maillot, Palais des Congres, RER to Pereire, line 3 Metro to Paris Gallieni, then bus to Tours. 7hrs 09min 45€. From Beauvais drive to Tours. 3hrs 31min 52€.