| Plonsk to Sangeorz-Bai | 410.51 mi (660.65 km) |
| Plonsk to Sannicolau Mare | 454.04 mi (730.70 km) |
| Plonsk to Santana | 437.00 mi (703.29 km) |
| Plonsk to Satu Mare | 352.46 mi (567.23 km) |
| Plonsk to Scobinti | 464.55 mi (747.62 km) |
| Plonsk to Scornicesti | 588.50 mi (947.09 km) |
| Plonsk to Sebes | 482.80 mi (776.98 km) |
| Plonsk to Seini | 361.07 mi (581.08 km) |
| Plonsk to Sfantu-Gheorghe | 527.09 mi (848.26 km) |
| Plonsk to Sibiu | 502.13 mi (808.10 km) |
| Plonsk to Sighetu Marmatiei | 359.99 mi (579.35 km) |
| Plonsk to Sighisoara | 485.35 mi (781.09 km) |
| Plonsk to Simeria | 483.34 mi (777.86 km) |
| Plonsk to Sinaia | 554.75 mi (892.78 km) |
| Plonsk to Slatina | 595.12 mi (957.76 km) |
