| Boadilla del Monte to Sangeorgiu de Mures | 1,473.92 mi (2,372.05 km) |
| Boadilla del Monte to Sangeorz-Bai | 1,491.16 mi (2,399.79 km) |
| Boadilla del Monte to Sannicolau Mare | 1,287.14 mi (2,071.46 km) |
| Boadilla del Monte to Santana | 1,332.11 mi (2,143.83 km) |
| Boadilla del Monte to Satu Mare | 1,413.86 mi (2,275.38 km) |
| Boadilla del Monte to Scobinti | 1,595.86 mi (2,568.29 km) |
| Boadilla del Monte to Scornicesti | 1,468.72 mi (2,363.68 km) |
| Boadilla del Monte to Sebes | 1,427.00 mi (2,296.54 km) |
| Boadilla del Monte to Seini | 1,431.32 mi (2,303.49 km) |
| Boadilla del Monte to Sfantu-Gheorghe | 1,532.71 mi (2,466.66 km) |
| Boadilla del Monte to Sibiu | 1,453.82 mi (2,339.70 km) |
| Boadilla del Monte to Sighetu Marmatiei | 1,461.30 mi (2,351.74 km) |
| Boadilla del Monte to Sighisoara | 1,486.95 mi (2,393.02 km) |
| Boadilla del Monte to Simeria | 1,399.45 mi (2,252.19 km) |
| Boadilla del Monte to Sinaia | 1,519.44 mi (2,445.30 km) |
