| Guyancourt to Sangeorz-Bai | 1,044.31 mi (1,680.65 km) |
| Guyancourt to Sannicolau Mare | 884.31 mi (1,423.16 km) |
| Guyancourt to Santana | 918.42 mi (1,478.06 km) |
| Guyancourt to Satu Mare | 956.53 mi (1,539.39 km) |
| Guyancourt to Scobinti | 1,146.45 mi (1,845.04 km) |
| Guyancourt to Scornicesti | 1,099.93 mi (1,770.17 km) |
| Guyancourt to Sebes | 1,020.95 mi (1,643.07 km) |
| Guyancourt to Seini | 975.10 mi (1,569.27 km) |
| Guyancourt to Sfantu-Gheorghe | 1,124.01 mi (1,808.92 km) |
| Guyancourt to Sibiu | 1,051.18 mi (1,691.71 km) |
| Guyancourt to Sighetu Marmatiei | 1,000.12 mi (1,609.54 km) |
| Guyancourt to Sighisoara | 1,070.97 mi (1,723.56 km) |
| Guyancourt to Simeria | 997.97 mi (1,606.08 km) |
| Guyancourt to Sinaia | 1,125.24 mi (1,810.91 km) |
| Guyancourt to Slatina | 1,095.41 mi (1,762.89 km) |
