| Gretna to Bilecik | 6,258.56 mi (10,072.18 km) |
| Gretna to Bingol | 6,717.09 mi (10,810.10 km) |
| Gretna to Birecik | 6,718.80 mi (10,812.86 km) |
| Gretna to Bitlis | 6,799.35 mi (10,942.50 km) |
| Gretna to Bodrum | 6,293.15 mi (10,127.84 km) |
| Gretna to Bogazliyan | 6,507.91 mi (10,473.47 km) |
| Gretna to Bolu | 6,294.99 mi (10,130.81 km) |
| Gretna to Bolvadin | 6,366.79 mi (10,246.35 km) |
| Gretna to Bor | 6,545.25 mi (10,533.56 km) |
| Gretna to Borcka | 6,628.93 mi (10,668.24 km) |
| Gretna to Boyabat | 6,379.69 mi (10,267.11 km) |
| Gretna to Bozdogan | 6,302.23 mi (10,142.45 km) |
| Gretna to Bozkir | 6,486.08 mi (10,438.33 km) |
| Gretna to Bozkurt | 6,349.87 mi (10,219.13 km) |
| Gretna to Bozuyuk | 6,271.59 mi (10,093.15 km) |
