| Idrija to Sangeorgiu de Mures | 499.60 mi (804.03 km) |
| Idrija to Sangeorz-Bai | 513.24 mi (825.97 km) |
| Idrija to Sannicolau Mare | 315.80 mi (508.24 km) |
| Idrija to Santana | 358.18 mi (576.43 km) |
| Idrija to Satu Mare | 435.99 mi (701.65 km) |
| Idrija to Scobinti | 618.28 mi (995.03 km) |
| Idrija to Scornicesti | 520.59 mi (837.81 km) |
| Idrija to Sebes | 457.89 mi (736.91 km) |
| Idrija to Seini | 453.27 mi (729.46 km) |
| Idrija to Sfantu-Gheorghe | 564.69 mi (908.77 km) |
| Idrija to Sibiu | 486.72 mi (783.30 km) |
| Idrija to Sighetu Marmatiei | 483.43 mi (778.00 km) |
| Idrija to Sighisoara | 515.40 mi (829.46 km) |
| Idrija to Simeria | 431.60 mi (694.59 km) |
| Idrija to Sinaia | 557.66 mi (897.47 km) |
