| Monaghan to Popovo | 1,667.47 mi (2,683.53 km) |
| Monaghan to Provadia | 1,721.91 mi (2,771.14 km) |
| Monaghan to Radnevo | 1,701.83 mi (2,738.84 km) |
| Monaghan to Radomir | 1,575.35 mi (2,535.28 km) |
| Monaghan to Rakitovo | 1,644.70 mi (2,646.89 km) |
| Monaghan to Rakovski | 1,664.79 mi (2,679.23 km) |
| Monaghan to Razgrad | 1,670.78 mi (2,688.86 km) |
| Monaghan to Razlog | 1,625.73 mi (2,616.37 km) |
| Monaghan to Ruse | 1,636.29 mi (2,633.35 km) |
| Monaghan to Samokov | 1,608.25 mi (2,588.23 km) |
| Monaghan to Sandanski | 1,633.42 mi (2,628.74 km) |
| Monaghan to Sevlievo | 1,637.71 mi (2,635.63 km) |
| Monaghan to Shumen | 1,697.89 mi (2,732.49 km) |
| Monaghan to Silistra | 1,675.66 mi (2,696.72 km) |
| Monaghan to Sliven | 1,700.42 mi (2,736.56 km) |
