| Boulogne-sur-Mer to Kastoria | 1,176.88 mi (1,894.01 km) |
| Boulogne-sur-Mer to Katerini | 1,236.10 mi (1,989.32 km) |
| Boulogne-sur-Mer to Keratsini | 1,390.33 mi (2,237.52 km) |
| Boulogne-sur-Mer to Kerkyra | 1,170.49 mi (1,883.72 km) |
| Boulogne-sur-Mer to Kiato | 1,355.81 mi (2,181.96 km) |
| Boulogne-sur-Mer to Kifisia | 1,392.05 mi (2,240.28 km) |
| Boulogne-sur-Mer to Kilkis | 1,217.50 mi (1,959.38 km) |
| Boulogne-sur-Mer to Komotini | 1,314.87 mi (2,116.08 km) |
| Boulogne-sur-Mer to Korinthos | 1,366.02 mi (2,198.40 km) |
| Boulogne-sur-Mer to Koropi | 1,403.32 mi (2,258.42 km) |
| Boulogne-sur-Mer to Korydallos | 1,390.75 mi (2,238.20 km) |
| Boulogne-sur-Mer to Kos | 1,583.94 mi (2,549.11 km) |
| Boulogne-sur-Mer to Kozani | 1,206.92 mi (1,942.35 km) |
| Boulogne-sur-Mer to Lagos | 1,300.36 mi (2,092.73 km) |
| Boulogne-sur-Mer to Lamia | 1,299.46 mi (2,091.27 km) |
