| Plonsk to Sestu | 1,066.18 mi (1,715.85 km) |
| Plonsk to Settimo Torinese | 770.76 mi (1,240.41 km) |
| Plonsk to Seveso | 699.70 mi (1,126.06 km) |
| Plonsk to Sezze | 841.75 mi (1,354.66 km) |
| Plonsk to Siano | 860.03 mi (1,384.08 km) |
| Plonsk to Siena | 766.49 mi (1,233.55 km) |
| Plonsk to Signa | 744.76 mi (1,198.58 km) |
| Plonsk to Silea | 604.26 mi (972.46 km) |
| Plonsk to Silvi Paese | 754.71 mi (1,214.58 km) |
| Plonsk to Sinalunga | 762.79 mi (1,227.59 km) |
| Plonsk to Siniscola | 973.16 mi (1,566.15 km) |
| Plonsk to Sinnai | 1,063.33 mi (1,711.26 km) |
| Plonsk to Siracusa | 1,103.26 mi (1,775.53 km) |
| Plonsk to Solaro | 702.90 mi (1,131.20 km) |
| Plonsk to Soliera | 694.30 mi (1,117.37 km) |
