| Pen-y-Bont ar Ogwr to Sangeorgiu de Mures | 1,306.94 mi (2,103.32 km) |
| Pen-y-Bont ar Ogwr to Sangeorz-Bai | 1,292.72 mi (2,080.43 km) |
| Pen-y-Bont ar Ogwr to Sannicolau Mare | 1,157.39 mi (1,862.64 km) |
| Pen-y-Bont ar Ogwr to Santana | 1,186.10 mi (1,908.84 km) |
| Pen-y-Bont ar Ogwr to Satu Mare | 1,204.56 mi (1,938.55 km) |
| Pen-y-Bont ar Ogwr to Scobinti | 1,389.25 mi (2,235.78 km) |
| Pen-y-Bont ar Ogwr to Scornicesti | 1,374.70 mi (2,212.37 km) |
| Pen-y-Bont ar Ogwr to Sebes | 1,286.63 mi (2,070.64 km) |
| Pen-y-Bont ar Ogwr to Seini | 1,222.65 mi (1,967.67 km) |
| Pen-y-Bont ar Ogwr to Sfantu-Gheorghe | 1,384.56 mi (2,228.24 km) |
| Pen-y-Bont ar Ogwr to Sibiu | 1,316.80 mi (2,119.19 km) |
| Pen-y-Bont ar Ogwr to Sighetu Marmatiei | 1,244.08 mi (2,002.15 km) |
| Pen-y-Bont ar Ogwr to Sighisoara | 1,330.90 mi (2,141.88 km) |
| Pen-y-Bont ar Ogwr to Simeria | 1,266.23 mi (2,037.80 km) |
| Pen-y-Bont ar Ogwr to Sinaia | 1,390.94 mi (2,238.50 km) |
