| Gravelines to Somma Lombardo | 474.37 mi (763.42 km) |
| Gravelines to Somma Vesuviana | 913.10 mi (1,469.49 km) |
| Gravelines to Sommacampagna | 556.42 mi (895.47 km) |
| Gravelines to Sona | 554.19 mi (891.88 km) |
| Gravelines to Sondrio | 485.34 mi (781.08 km) |
| Gravelines to Sora | 840.88 mi (1,353.27 km) |
| Gravelines to Sorbolo | 572.41 mi (921.20 km) |
| Gravelines to Soresina | 530.59 mi (853.90 km) |
| Gravelines to Sorisole | 500.49 mi (805.46 km) |
| Gravelines to Sorrento | 924.92 mi (1,488.51 km) |
| Gravelines to Sorso | 768.51 mi (1,236.79 km) |
| Gravelines to Sortino | 1,146.15 mi (1,844.55 km) |
| Gravelines to Soverato Marina | 1,101.38 mi (1,772.49 km) |
| Gravelines to Sovicille | 681.91 mi (1,097.43 km) |
| Gravelines to Spello | 741.75 mi (1,193.72 km) |
