| Ostrow Mazowiecka to Sestu | 1,113.16 mi (1,791.46 km) |
| Ostrow Mazowiecka to Settimo Torinese | 829.07 mi (1,334.26 km) |
| Ostrow Mazowiecka to Seveso | 757.13 mi (1,218.49 km) |
| Ostrow Mazowiecka to Sezze | 882.70 mi (1,420.57 km) |
| Ostrow Mazowiecka to Siano | 895.18 mi (1,440.65 km) |
| Ostrow Mazowiecka to Siena | 815.13 mi (1,311.83 km) |
| Ostrow Mazowiecka to Signa | 794.84 mi (1,279.18 km) |
| Ostrow Mazowiecka to Silea | 655.76 mi (1,055.34 km) |
| Ostrow Mazowiecka to Silvi Paese | 794.32 mi (1,278.34 km) |
| Ostrow Mazowiecka to Sinalunga | 810.27 mi (1,304.01 km) |
| Ostrow Mazowiecka to Siniscola | 1,020.72 mi (1,642.69 km) |
| Ostrow Mazowiecka to Sinnai | 1,110.10 mi (1,786.54 km) |
| Ostrow Mazowiecka to Siracusa | 1,132.81 mi (1,823.08 km) |
| Ostrow Mazowiecka to Solaro | 760.35 mi (1,223.66 km) |
| Ostrow Mazowiecka to Soliera | 746.75 mi (1,201.78 km) |
