| Seclin to Sangeorz-Bai | 1,002.59 mi (1,613.51 km) |
| Seclin to Sannicolau Mare | 862.87 mi (1,388.66 km) |
| Seclin to Santana | 891.99 mi (1,435.52 km) |
| Seclin to Satu Mare | 914.27 mi (1,471.38 km) |
| Seclin to Scobinti | 1,101.04 mi (1,771.95 km) |
| Seclin to Scornicesti | 1,080.19 mi (1,738.40 km) |
| Seclin to Sebes | 992.89 mi (1,597.90 km) |
| Seclin to Seini | 932.55 mi (1,500.80 km) |
| Seclin to Sfantu-Gheorghe | 1,091.80 mi (1,757.08 km) |
| Seclin to Sibiu | 1,023.10 mi (1,646.53 km) |
| Seclin to Sighetu Marmatiei | 955.07 mi (1,537.04 km) |
| Seclin to Sighisoara | 1,038.17 mi (1,670.77 km) |
| Seclin to Simeria | 972.15 mi (1,564.52 km) |
| Seclin to Sinaia | 1,097.32 mi (1,765.96 km) |
| Seclin to Slatina | 1,077.20 mi (1,733.59 km) |
