| Sonsbeck to Popovo | 1,083.47 mi (1,743.67 km) |
| Sonsbeck to Provadia | 1,137.94 mi (1,831.34 km) |
| Sonsbeck to Radnevo | 1,118.75 mi (1,800.46 km) |
| Sonsbeck to Radomir | 995.94 mi (1,602.80 km) |
| Sonsbeck to Rakitovo | 1,064.67 mi (1,713.43 km) |
| Sonsbeck to Rakovski | 1,082.73 mi (1,742.48 km) |
| Sonsbeck to Razgrad | 1,086.77 mi (1,748.99 km) |
| Sonsbeck to Razlog | 1,047.25 mi (1,685.39 km) |
| Sonsbeck to Ruse | 1,052.28 mi (1,693.47 km) |
| Sonsbeck to Samokov | 1,028.26 mi (1,654.82 km) |
| Sonsbeck to Sandanski | 1,056.41 mi (1,700.12 km) |
| Sonsbeck to Sevlievo | 1,054.37 mi (1,696.85 km) |
| Sonsbeck to Shumen | 1,113.88 mi (1,792.62 km) |
| Sonsbeck to Silistra | 1,092.31 mi (1,757.90 km) |
| Sonsbeck to Sliven | 1,116.70 mi (1,797.15 km) |
