| Mettmann to Popovo | 1,050.20 mi (1,690.13 km) |
| Mettmann to Provadia | 1,105.01 mi (1,778.34 km) |
| Mettmann to Radnevo | 1,084.79 mi (1,745.80 km) |
| Mettmann to Radomir | 961.19 mi (1,546.89 km) |
| Mettmann to Rakitovo | 1,030.02 mi (1,657.66 km) |
| Mettmann to Rakovski | 1,048.45 mi (1,687.32 km) |
| Mettmann to Razgrad | 1,053.73 mi (1,695.81 km) |
| Mettmann to Razlog | 1,012.41 mi (1,629.31 km) |
| Mettmann to Ruse | 1,019.22 mi (1,640.27 km) |
| Mettmann to Samokov | 993.60 mi (1,599.04 km) |
| Mettmann to Sandanski | 1,021.43 mi (1,643.83 km) |
| Mettmann to Sevlievo | 1,020.51 mi (1,642.36 km) |
| Mettmann to Shumen | 1,080.83 mi (1,739.43 km) |
| Mettmann to Silistra | 1,059.98 mi (1,705.87 km) |
| Mettmann to Sliven | 1,083.07 mi (1,743.03 km) |
