| Boulogne-sur-Mer to Spilamberto | 611.28 mi (983.76 km) |
| Boulogne-sur-Mer to Spilimbergo | 605.62 mi (974.65 km) |
| Boulogne-sur-Mer to Spinea | 605.23 mi (974.02 km) |
| Boulogne-sur-Mer to Spoleto | 758.69 mi (1,220.99 km) |
| Boulogne-sur-Mer to Spoltore | 822.72 mi (1,324.04 km) |
| Boulogne-sur-Mer to Spresiano | 595.76 mi (958.79 km) |
| Boulogne-sur-Mer to Squinzano | 1,062.20 mi (1,709.44 km) |
| Boulogne-sur-Mer to Statte | 1,025.44 mi (1,650.28 km) |
| Boulogne-sur-Mer to Stezzano | 509.44 mi (819.86 km) |
| Boulogne-sur-Mer to Strada | 670.75 mi (1,079.46 km) |
| Boulogne-sur-Mer to Stradella | 527.40 mi (848.77 km) |
| Boulogne-sur-Mer to Striano | 923.87 mi (1,486.83 km) |
| Boulogne-sur-Mer to Subiaco | 816.28 mi (1,313.67 km) |
| Boulogne-sur-Mer to Sulmona | 836.84 mi (1,346.76 km) |
| Boulogne-sur-Mer to Surbo | 1,066.85 mi (1,716.93 km) |
