The Autopista AP-8 is a toll autopista in the north of Spain, crossing the Basque Country from east to west.

It is known as the Autopista del Cantábrico (Spanish for 'Motorway of the Cantabrian', Basque: Kantauriko autobidea) and connects the French border with Bilbao via San Sebastián, Zarautz, Eibar and Durango.

At Bilbao the AP-8 continues as the toll-free Autovía A-8, which runs along the Spanish northern coast to Gijón and eventually the region of Galicia.

[3] It was finished in 1976, with the opening of the international connection to the A63 autoroute in France.

[4] Additionally, the new southern ring road of Bilbao, designated as AP-8[5] and commonly known as the Supersur [es], opened in 2011.