| Boulogne-sur-Mer to Zottegem | 95.92 mi (154.38 km) |
| Boulogne-sur-Mer to Zulte | 80.46 mi (129.49 km) |
| Boulogne-sur-Mer to Zwevegem | 75.28 mi (121.15 km) |
| Boulogne-sur-Mer to Zwijndrecht | 123.03 mi (198.00 km) |
| Boulogne-sur-Mer to Asenovgrad | 1,253.73 mi (2,017.68 km) |
| Boulogne-sur-Mer to Aytos | 1,326.18 mi (2,134.28 km) |
| Boulogne-sur-Mer to Balchik | 1,338.00 mi (2,153.30 km) |
| Boulogne-sur-Mer to Bankya | 1,154.48 mi (1,857.95 km) |
| Boulogne-sur-Mer to Bansko | 1,204.90 mi (1,939.10 km) |
| Boulogne-sur-Mer to Berkovitsa | 1,132.44 mi (1,822.49 km) |
| Boulogne-sur-Mer to Blagoevgrad | 1,181.36 mi (1,901.21 km) |
| Boulogne-sur-Mer to Botevgrad | 1,173.35 mi (1,888.33 km) |
| Boulogne-sur-Mer to Burgas | 1,343.06 mi (2,161.44 km) |
| Boulogne-sur-Mer to Byala Slatina | 1,157.39 mi (1,862.64 km) |
| Boulogne-sur-Mer to Chirpan | 1,265.17 mi (2,036.09 km) |
