| Merzenich to Popovo | 1,056.54 mi (1,700.34 km) |
| Merzenich to Provadia | 1,112.22 mi (1,789.94 km) |
| Merzenich to Radnevo | 1,088.97 mi (1,752.53 km) |
| Merzenich to Radomir | 962.33 mi (1,548.72 km) |
| Merzenich to Rakitovo | 1,031.56 mi (1,660.13 km) |
| Merzenich to Rakovski | 1,051.55 mi (1,692.30 km) |
| Merzenich to Razgrad | 1,060.69 mi (1,707.01 km) |
| Merzenich to Razlog | 1,013.01 mi (1,630.28 km) |
| Merzenich to Ruse | 1,026.16 mi (1,651.45 km) |
| Merzenich to Samokov | 995.11 mi (1,601.47 km) |
| Merzenich to Sandanski | 1,021.26 mi (1,643.56 km) |
| Merzenich to Sevlievo | 1,025.09 mi (1,649.73 km) |
| Merzenich to Shumen | 1,087.74 mi (1,750.55 km) |
| Merzenich to Silistra | 1,068.70 mi (1,719.91 km) |
| Merzenich to Sliven | 1,088.33 mi (1,751.50 km) |
