| Boulogne-Billancourt to Sangeorz-Bai | 1,036.48 mi (1,668.06 km) |
| Boulogne-Billancourt to Sannicolau Mare | 877.16 mi (1,411.66 km) |
| Boulogne-Billancourt to Santana | 911.09 mi (1,466.26 km) |
| Boulogne-Billancourt to Satu Mare | 948.67 mi (1,526.74 km) |
| Boulogne-Billancourt to Scobinti | 1,138.53 mi (1,832.29 km) |
| Boulogne-Billancourt to Scornicesti | 1,092.93 mi (1,758.90 km) |
| Boulogne-Billancourt to Sebes | 1,013.60 mi (1,631.23 km) |
| Boulogne-Billancourt to Seini | 967.23 mi (1,556.61 km) |
| Boulogne-Billancourt to Sfantu-Gheorghe | 1,116.53 mi (1,796.88 km) |
| Boulogne-Billancourt to Sibiu | 1,043.84 mi (1,679.89 km) |
| Boulogne-Billancourt to Sighetu Marmatiei | 992.18 mi (1,596.76 km) |
| Boulogne-Billancourt to Sighisoara | 1,063.46 mi (1,711.47 km) |
| Boulogne-Billancourt to Simeria | 990.69 mi (1,594.37 km) |
| Boulogne-Billancourt to Sinaia | 1,117.92 mi (1,799.12 km) |
| Boulogne-Billancourt to Slatina | 1,088.46 mi (1,751.71 km) |
