| Seclin to Somma Lombardo | 425.66 mi (685.03 km) |
| Seclin to Somma Vesuviana | 863.91 mi (1,390.33 km) |
| Seclin to Sommacampagna | 506.82 mi (815.65 km) |
| Seclin to Sona | 504.58 mi (812.04 km) |
| Seclin to Sondrio | 435.73 mi (701.23 km) |
| Seclin to Sora | 791.70 mi (1,274.11 km) |
| Seclin to Sorbolo | 523.17 mi (841.95 km) |
| Seclin to Soresina | 481.39 mi (774.72 km) |
| Seclin to Sorisole | 451.13 mi (726.02 km) |
| Seclin to Sorrento | 875.84 mi (1,409.53 km) |
| Seclin to Sorso | 724.44 mi (1,165.87 km) |
| Seclin to Sortino | 1,098.05 mi (1,767.15 km) |
| Seclin to Soverato Marina | 1,052.16 mi (1,693.28 km) |
| Seclin to Sovicille | 633.13 mi (1,018.93 km) |
| Seclin to Spello | 692.43 mi (1,114.36 km) |
