| Welwyn Garden City to Sangeorgiu de Mures | 1,164.95 mi (1,874.80 km) |
| Welwyn Garden City to Sangeorz-Bai | 1,149.20 mi (1,849.47 km) |
| Welwyn Garden City to Sannicolau Mare | 1,019.77 mi (1,641.16 km) |
| Welwyn Garden City to Santana | 1,046.81 mi (1,684.68 km) |
| Welwyn Garden City to Satu Mare | 1,061.22 mi (1,707.86 km) |
| Welwyn Garden City to Scobinti | 1,244.79 mi (2,003.29 km) |
| Welwyn Garden City to Scornicesti | 1,236.76 mi (1,990.37 km) |
| Welwyn Garden City to Sebes | 1,146.47 mi (1,845.07 km) |
| Welwyn Garden City to Seini | 1,079.19 mi (1,736.79 km) |
| Welwyn Garden City to Sfantu-Gheorghe | 1,242.96 mi (2,000.36 km) |
| Welwyn Garden City to Sibiu | 1,176.53 mi (1,893.44 km) |
| Welwyn Garden City to Sighetu Marmatiei | 1,100.06 mi (1,770.37 km) |
| Welwyn Garden City to Sighisoara | 1,189.32 mi (1,914.02 km) |
| Welwyn Garden City to Simeria | 1,126.79 mi (1,813.40 km) |
| Welwyn Garden City to Sinaia | 1,250.47 mi (2,012.44 km) |
