| Gourock to Bilecik | 1,911.80 mi (3,076.75 km) |
| Gourock to Bingol | 2,366.39 mi (3,808.34 km) |
| Gourock to Birecik | 2,364.01 mi (3,804.50 km) |
| Gourock to Bitlis | 2,451.39 mi (3,945.13 km) |
| Gourock to Bodrum | 1,983.48 mi (3,192.10 km) |
| Gourock to Bogazliyan | 2,153.17 mi (3,465.20 km) |
| Gourock to Bolu | 1,942.16 mi (3,125.61 km) |
| Gourock to Bolvadin | 2,022.95 mi (3,255.62 km) |
| Gourock to Bor | 2,193.88 mi (3,530.71 km) |
| Gourock to Borcka | 2,293.50 mi (3,691.03 km) |
| Gourock to Boyabat | 2,025.19 mi (3,259.23 km) |
| Gourock to Bozdogan | 1,980.06 mi (3,186.60 km) |
| Gourock to Bozkir | 2,145.18 mi (3,452.34 km) |
| Gourock to Bozkurt | 2,018.37 mi (3,248.25 km) |
| Gourock to Bozuyuk | 1,925.72 mi (3,099.14 km) |
