| Letchworth to Sangeorgiu de Mures | 1,168.28 mi (1,880.17 km) |
| Letchworth to Sangeorz-Bai | 1,151.98 mi (1,853.93 km) |
| Letchworth to Sannicolau Mare | 1,024.35 mi (1,648.53 km) |
| Letchworth to Santana | 1,050.97 mi (1,691.38 km) |
| Letchworth to Satu Mare | 1,064.08 mi (1,712.47 km) |
| Letchworth to Scobinti | 1,247.12 mi (2,007.04 km) |
| Letchworth to Scornicesti | 1,241.21 mi (1,997.53 km) |
| Letchworth to Sebes | 1,150.37 mi (1,851.34 km) |
| Letchworth to Seini | 1,082.00 mi (1,741.32 km) |
| Letchworth to Sfantu-Gheorghe | 1,246.42 mi (2,005.91 km) |
| Letchworth to Sibiu | 1,180.39 mi (1,899.66 km) |
| Letchworth to Sighetu Marmatiei | 1,102.62 mi (1,774.50 km) |
| Letchworth to Sighisoara | 1,192.78 mi (1,919.60 km) |
| Letchworth to Simeria | 1,130.89 mi (1,820.00 km) |
| Letchworth to Sinaia | 1,254.26 mi (2,018.54 km) |
