| Castricum to Sangeorz-Bai | 954.93 mi (1,536.81 km) |
| Castricum to Sannicolau Mare | 843.90 mi (1,358.13 km) |
| Castricum to Santana | 866.03 mi (1,393.74 km) |
| Castricum to Satu Mare | 867.95 mi (1,396.83 km) |
| Castricum to Scobinti | 1,046.91 mi (1,684.83 km) |
| Castricum to Scornicesti | 1,058.09 mi (1,702.83 km) |
| Castricum to Sebes | 962.40 mi (1,548.83 km) |
| Castricum to Seini | 885.42 mi (1,424.95 km) |
| Castricum to Sfantu-Gheorghe | 1,054.19 mi (1,696.56 km) |
| Castricum to Sibiu | 991.94 mi (1,596.38 km) |
| Castricum to Sighetu Marmatiei | 904.26 mi (1,455.27 km) |
| Castricum to Sighisoara | 1,000.86 mi (1,610.73 km) |
| Castricum to Simeria | 944.90 mi (1,520.67 km) |
| Castricum to Sinaia | 1,064.88 mi (1,713.76 km) |
| Castricum to Slatina | 1,057.01 mi (1,701.10 km) |
