From Acqui Terme train to Savona, train to Ventimiglia(fr), then train to Cannes. 5hrs 28min 40 €. From Acqui Terme bus to Alessandria, train to Genoa, bus to Nice Côte d'Azur Airport T1, then bus to Cannes. 7hrs 51min 81 €. From Acqui Terme drive to Cannes. 2hrs 46min 43 €.