| Plougastel-Daoulas to Somma Lombardo | 642.09 mi (1,033.34 km) |
| Plougastel-Daoulas to Somma Vesuviana | 1,056.11 mi (1,699.65 km) |
| Plougastel-Daoulas to Sommacampagna | 746.08 mi (1,200.70 km) |
| Plougastel-Daoulas to Sona | 744.49 mi (1,198.14 km) |
| Plougastel-Daoulas to Sondrio | 683.67 mi (1,100.26 km) |
| Plougastel-Daoulas to Sora | 987.88 mi (1,589.83 km) |
| Plougastel-Daoulas to Sorbolo | 742.95 mi (1,195.67 km) |
| Plougastel-Daoulas to Soresina | 704.33 mi (1,133.51 km) |
| Plougastel-Daoulas to Sorisole | 683.83 mi (1,100.52 km) |
| Plougastel-Daoulas to Sorrento | 1,063.39 mi (1,711.36 km) |
| Plougastel-Daoulas to Sorso | 822.59 mi (1,323.83 km) |
| Plougastel-Daoulas to Sortino | 1,246.09 mi (2,005.39 km) |
| Plougastel-Daoulas to Soverato Marina | 1,237.34 mi (1,991.30 km) |
| Plougastel-Daoulas to Sovicille | 827.45 mi (1,331.66 km) |
| Plougastel-Daoulas to Spello | 900.32 mi (1,448.92 km) |
