| Cumbernauld to Popovo | 1,588.49 mi (2,556.43 km) |
| Cumbernauld to Provadia | 1,640.13 mi (2,639.53 km) |
| Cumbernauld to Radnevo | 1,628.77 mi (2,621.25 km) |
| Cumbernauld to Radomir | 1,511.24 mi (2,432.11 km) |
| Cumbernauld to Rakitovo | 1,579.35 mi (2,541.72 km) |
| Cumbernauld to Rakovski | 1,594.96 mi (2,566.84 km) |
| Cumbernauld to Razgrad | 1,590.06 mi (2,558.96 km) |
| Cumbernauld to Razlog | 1,563.06 mi (2,515.50 km) |
| Cumbernauld to Ruse | 1,555.86 mi (2,503.91 km) |
| Cumbernauld to Samokov | 1,543.04 mi (2,483.29 km) |
| Cumbernauld to Sandanski | 1,572.93 mi (2,531.39 km) |
| Cumbernauld to Sevlievo | 1,563.83 mi (2,516.73 km) |
| Cumbernauld to Shumen | 1,617.12 mi (2,602.50 km) |
| Cumbernauld to Silistra | 1,589.98 mi (2,558.83 km) |
| Cumbernauld to Sliven | 1,624.29 mi (2,614.05 km) |
