| Bottrop to Popovo | 1,059.70 mi (1,705.43 km) |
| Bottrop to Provadia | 1,114.07 mi (1,792.93 km) |
| Bottrop to Radnevo | 1,095.30 mi (1,762.71 km) |
| Bottrop to Radomir | 973.08 mi (1,566.03 km) |
| Bottrop to Rakitovo | 1,041.72 mi (1,676.49 km) |
| Bottrop to Rakovski | 1,059.46 mi (1,705.04 km) |
| Bottrop to Razgrad | 1,062.93 mi (1,710.63 km) |
| Bottrop to Razlog | 1,024.51 mi (1,648.78 km) |
| Bottrop to Ruse | 1,028.44 mi (1,655.12 km) |
| Bottrop to Samokov | 1,005.32 mi (1,617.90 km) |
| Bottrop to Sandanski | 1,033.84 mi (1,663.81 km) |
| Bottrop to Sevlievo | 1,030.86 mi (1,659.01 km) |
| Bottrop to Shumen | 1,090.05 mi (1,754.27 km) |
| Bottrop to Silistra | 1,068.30 mi (1,719.27 km) |
| Bottrop to Sliven | 1,093.08 mi (1,759.14 km) |
