| Caernarfon to Bois-Colombes | 406.92 mi (654.87 km) |
| Caernarfon to Bois-d'Arcy | 405.94 mi (653.31 km) |
| Caernarfon to Bois-Guillaume | 344.04 mi (553.68 km) |
| Caernarfon to Boissy-Saint-Leger | 422.85 mi (680.51 km) |
| Caernarfon to Bolbec | 320.23 mi (515.36 km) |
| Caernarfon to Bollene | 736.18 mi (1,184.76 km) |
| Caernarfon to Bondoufle | 426.14 mi (685.80 km) |
| Caernarfon to Bondues | 355.90 mi (572.77 km) |
| Caernarfon to Bondy | 414.24 mi (666.65 km) |
| Caernarfon to Bonneuil-sur-Marne | 420.94 mi (677.44 km) |
| Caernarfon to Bonneville | 681.47 mi (1,096.72 km) |
| Caernarfon to Bordeaux | 597.17 mi (961.05 km) |
| Caernarfon to Borgo | 965.39 mi (1,553.65 km) |
| Caernarfon to Bouc-Bel-Air | 802.17 mi (1,290.97 km) |
| Caernarfon to Boucau | 676.48 mi (1,088.69 km) |
