| Welkenraedt to Provadia | 1,131.28 mi (1,820.61 km) |
| Welkenraedt to Radnevo | 1,106.33 mi (1,780.47 km) |
| Welkenraedt to Radomir | 977.93 mi (1,573.83 km) |
| Welkenraedt to Rakitovo | 1,047.36 mi (1,685.56 km) |
| Welkenraedt to Rakovski | 1,068.29 mi (1,719.24 km) |
| Welkenraedt to Razgrad | 1,079.63 mi (1,737.50 km) |
| Welkenraedt to Razlog | 1,028.24 mi (1,654.79 km) |
| Welkenraedt to Ruse | 1,045.12 mi (1,681.95 km) |
| Welkenraedt to Samokov | 1,010.92 mi (1,626.91 km) |
| Welkenraedt to Sandanski | 1,036.00 mi (1,667.28 km) |
| Welkenraedt to Sevlievo | 1,042.71 mi (1,678.09 km) |
| Welkenraedt to Shumen | 1,106.65 mi (1,780.98 km) |
| Welkenraedt to Silistra | 1,088.59 mi (1,751.92 km) |
| Welkenraedt to Sliven | 1,106.31 mi (1,780.44 km) |
| Welkenraedt to Smolyan | 1,089.47 mi (1,753.33 km) |
