| Ostrow Mazowiecka to Solofra | 890.44 mi (1,433.03 km) |
| Ostrow Mazowiecka to Somma Lombardo | 770.15 mi (1,239.44 km) |
| Ostrow Mazowiecka to Somma Vesuviana | 895.27 mi (1,440.80 km) |
| Ostrow Mazowiecka to Sommacampagna | 713.53 mi (1,148.31 km) |
| Ostrow Mazowiecka to Sona | 712.30 mi (1,146.33 km) |
| Ostrow Mazowiecka to Sondrio | 706.52 mi (1,137.03 km) |
| Ostrow Mazowiecka to Sora | 857.34 mi (1,379.75 km) |
| Ostrow Mazowiecka to Sorbolo | 755.45 mi (1,215.78 km) |
| Ostrow Mazowiecka to Soresina | 751.16 mi (1,208.87 km) |
| Ostrow Mazowiecka to Sorisole | 734.98 mi (1,182.84 km) |
| Ostrow Mazowiecka to Sorrento | 912.27 mi (1,468.16 km) |
| Ostrow Mazowiecka to Sorso | 1,037.96 mi (1,670.44 km) |
| Ostrow Mazowiecka to Sortino | 1,129.81 mi (1,818.26 km) |
| Ostrow Mazowiecka to Soverato Marina | 1,008.20 mi (1,622.54 km) |
| Ostrow Mazowiecka to Sovicille | 819.84 mi (1,319.41 km) |
