| Opmeer to Sangeorz-Bai | 946.02 mi (1,522.47 km) |
| Opmeer to Sannicolau Mare | 837.85 mi (1,348.38 km) |
| Opmeer to Santana | 859.27 mi (1,382.86 km) |
| Opmeer to Satu Mare | 859.28 mi (1,382.87 km) |
| Opmeer to Scobinti | 1,037.32 mi (1,669.41 km) |
| Opmeer to Scornicesti | 1,051.44 mi (1,692.12 km) |
| Opmeer to Sebes | 955.07 mi (1,537.03 km) |
| Opmeer to Seini | 876.65 mi (1,410.83 km) |
| Opmeer to Sfantu-Gheorghe | 1,046.10 mi (1,683.53 km) |
| Opmeer to Sibiu | 984.51 mi (1,584.42 km) |
| Opmeer to Sighetu Marmatiei | 895.13 mi (1,440.57 km) |
| Opmeer to Sighisoara | 992.85 mi (1,597.84 km) |
| Opmeer to Simeria | 937.90 mi (1,509.40 km) |
| Opmeer to Sinaia | 1,057.25 mi (1,701.49 km) |
| Opmeer to Slatina | 1,050.54 mi (1,690.69 km) |
