| Mortsel to Provadia | 1,204.54 mi (1,938.53 km) |
| Mortsel to Radnevo | 1,180.36 mi (1,899.61 km) |
| Mortsel to Radomir | 1,052.22 mi (1,693.38 km) |
| Mortsel to Rakitovo | 1,121.64 mi (1,805.11 km) |
| Mortsel to Rakovski | 1,142.47 mi (1,838.62 km) |
| Mortsel to Razgrad | 1,152.97 mi (1,855.52 km) |
| Mortsel to Razlog | 1,102.53 mi (1,774.34 km) |
| Mortsel to Ruse | 1,118.44 mi (1,799.96 km) |
| Mortsel to Samokov | 1,085.20 mi (1,746.46 km) |
| Mortsel to Sandanski | 1,110.25 mi (1,786.77 km) |
| Mortsel to Sevlievo | 1,116.66 mi (1,797.10 km) |
| Mortsel to Shumen | 1,180.01 mi (1,899.04 km) |
| Mortsel to Silistra | 1,161.26 mi (1,868.86 km) |
| Mortsel to Sliven | 1,180.13 mi (1,899.23 km) |
| Mortsel to Smolyan | 1,163.75 mi (1,872.88 km) |
