| Donostia to Bingol | 2,208.75 mi (3,554.64 km) |
| Donostia to Birecik | 2,132.71 mi (3,432.26 km) |
| Donostia to Bitlis | 2,301.71 mi (3,704.24 km) |
| Donostia to Bodrum | 1,602.49 mi (2,578.96 km) |
| Donostia to Bogazliyan | 1,938.21 mi (3,119.24 km) |
| Donostia to Bolu | 1,721.39 mi (2,770.31 km) |
| Donostia to Bolvadin | 1,739.24 mi (2,799.03 km) |
| Donostia to Bor | 1,937.59 mi (3,118.25 km) |
| Donostia to Borcka | 2,208.24 mi (3,553.82 km) |
| Donostia to Boyabat | 1,864.54 mi (3,000.69 km) |
| Donostia to Bozdogan | 1,628.93 mi (2,621.51 km) |
| Donostia to Bozkir | 1,840.03 mi (2,961.23 km) |
| Donostia to Bozkurt | 1,690.60 mi (2,720.75 km) |
| Donostia to Bozuyuk | 1,660.23 mi (2,671.89 km) |
| Donostia to Bucak | 1,749.54 mi (2,815.62 km) |
