| Euskirchen to Popovo | 1,041.54 mi (1,676.20 km) |
| Euskirchen to Provadia | 1,097.38 mi (1,766.06 km) |
| Euskirchen to Radnevo | 1,073.59 mi (1,727.78 km) |
| Euskirchen to Radomir | 946.54 mi (1,523.31 km) |
| Euskirchen to Rakitovo | 1,015.81 mi (1,634.79 km) |
| Euskirchen to Rakovski | 1,036.01 mi (1,667.30 km) |
| Euskirchen to Razgrad | 1,045.80 mi (1,683.06 km) |
| Euskirchen to Razlog | 997.15 mi (1,604.76 km) |
| Euskirchen to Ruse | 1,011.28 mi (1,627.50 km) |
| Euskirchen to Samokov | 979.36 mi (1,576.13 km) |
| Euskirchen to Sandanski | 1,005.32 mi (1,617.91 km) |
| Euskirchen to Sevlievo | 1,009.79 mi (1,625.09 km) |
| Euskirchen to Shumen | 1,072.85 mi (1,726.58 km) |
| Euskirchen to Silistra | 1,054.19 mi (1,696.55 km) |
| Euskirchen to Sliven | 1,073.13 mi (1,727.04 km) |
