| Boulogne-sur-Mer to Suchanino | 754.51 mi (1,214.27 km) |
| Boulogne-sur-Mer to Sulechow | 609.76 mi (981.31 km) |
| Boulogne-sur-Mer to Sulecin | 590.52 mi (950.35 km) |
| Boulogne-sur-Mer to Sulejowek | 849.91 mi (1,367.80 km) |
| Boulogne-sur-Mer to Suwalki | 924.08 mi (1,487.16 km) |
| Boulogne-sur-Mer to Swarzedz | 672.57 mi (1,082.40 km) |
| Boulogne-sur-Mer to Swidnica | 648.42 mi (1,043.53 km) |
| Boulogne-sur-Mer to Swidnik | 914.86 mi (1,472.33 km) |
| Boulogne-sur-Mer to Swidwin | 633.44 mi (1,019.42 km) |
| Boulogne-sur-Mer to Swiebodzice | 641.80 mi (1,032.88 km) |
| Boulogne-sur-Mer to Swiecie | 736.15 mi (1,184.72 km) |
| Boulogne-sur-Mer to Swiedbodzin | 607.01 mi (976.89 km) |
| Boulogne-sur-Mer to Swietochlowice | 759.16 mi (1,221.75 km) |
| Boulogne-sur-Mer to Swinoujscie | 576.34 mi (927.52 km) |
| Boulogne-sur-Mer to Sycow | 699.92 mi (1,126.41 km) |
