| Portchester to Bilecik | 1,661.23 mi (2,673.49 km) |
| Portchester to Bingol | 2,164.44 mi (3,483.33 km) |
| Portchester to Birecik | 2,134.12 mi (3,434.54 km) |
| Portchester to Bitlis | 2,254.14 mi (3,627.68 km) |
| Portchester to Bodrum | 1,693.87 mi (2,726.01 km) |
| Portchester to Bogazliyan | 1,924.95 mi (3,097.91 km) |
| Portchester to Bolu | 1,706.47 mi (2,746.30 km) |
| Portchester to Bolvadin | 1,766.81 mi (2,843.41 km) |
| Portchester to Bor | 1,951.44 mi (3,140.54 km) |
| Portchester to Borcka | 2,118.79 mi (3,409.86 km) |
| Portchester to Boyabat | 1,814.38 mi (2,919.96 km) |
| Portchester to Bozdogan | 1,700.01 mi (2,735.90 km) |
| Portchester to Bozkir | 1,884.43 mi (3,032.70 km) |
| Portchester to Bozkurt | 1,747.01 mi (2,811.54 km) |
| Portchester to Bozuyuk | 1,673.44 mi (2,693.15 km) |
