From Beauvais Airport bus to Porte de Champerret, line 3 Metro to Paris St Lazare, then train to Caen. 4hrs 23min 57€. From Tillé line 19 bus to Beauvais, line 38 bus to Gisors, bus to Evreux Normandie, then train to Caen. 7hrs 09min. From Beauvais drive to Caen. 2hrs 41min 34€.