| Grevenbroich to Smolyan | 1,080.39 mi (1,738.72 km) |
| Grevenbroich to Sofia | 976.46 mi (1,571.46 km) |
| Grevenbroich to Sopot | 1,032.87 mi (1,662.24 km) |
| Grevenbroich to Sozopol | 1,159.09 mi (1,865.38 km) |
| Grevenbroich to Sredets | 1,142.05 mi (1,837.96 km) |
| Grevenbroich to Stamboliyski | 1,048.22 mi (1,686.95 km) |
| Grevenbroich to Stara Zagora | 1,077.45 mi (1,733.99 km) |
| Grevenbroich to Svilengrad | 1,128.91 mi (1,816.80 km) |
| Grevenbroich to Svishtov | 1,014.47 mi (1,632.64 km) |
| Grevenbroich to Targovishte | 1,079.11 mi (1,736.66 km) |
| Grevenbroich to Teteven | 1,002.26 mi (1,612.99 km) |
| Grevenbroich to Troyan | 1,021.15 mi (1,643.38 km) |
| Grevenbroich to Tryavna | 1,052.44 mi (1,693.73 km) |
| Grevenbroich to Tutrakan | 1,048.05 mi (1,686.68 km) |
| Grevenbroich to Varna | 1,134.39 mi (1,825.63 km) |
