| Kalmthout to Provadia | 1,209.31 mi (1,946.20 km) |
| Kalmthout to Radnevo | 1,186.26 mi (1,909.10 km) |
| Kalmthout to Radomir | 1,059.15 mi (1,704.54 km) |
| Kalmthout to Rakitovo | 1,128.46 mi (1,816.09 km) |
| Kalmthout to Rakovski | 1,148.74 mi (1,848.72 km) |
| Kalmthout to Razgrad | 1,157.82 mi (1,863.33 km) |
| Kalmthout to Razlog | 1,109.66 mi (1,785.83 km) |
| Kalmthout to Ruse | 1,123.30 mi (1,807.77 km) |
| Kalmthout to Samokov | 1,092.02 mi (1,757.43 km) |
| Kalmthout to Sandanski | 1,117.66 mi (1,798.69 km) |
| Kalmthout to Sevlievo | 1,122.39 mi (1,806.32 km) |
| Kalmthout to Shumen | 1,184.89 mi (1,906.89 km) |
| Kalmthout to Silistra | 1,165.43 mi (1,875.58 km) |
| Kalmthout to Sliven | 1,185.63 mi (1,908.08 km) |
| Kalmthout to Smolyan | 1,170.57 mi (1,883.85 km) |
