From Acqui Terme train to Savona, train to Ventimiglia(fr), then train to Cannes. 5hrs 19min 39 €. From Acqui Terme bus to Alessandria, train to Genoa, bus to Nice Côte d'Azur Airport T1, then bus to Cannes. 7hrs 51min 84 €. From Acqui Terme drive to Cannes. 3hrs 19min 46 €.