| Cwmbran to Popovo | 1,468.56 mi (2,363.42 km) |
| Cwmbran to Provadia | 1,525.38 mi (2,454.86 km) |
| Cwmbran to Radnevo | 1,497.01 mi (2,409.21 km) |
| Cwmbran to Radomir | 1,363.73 mi (2,194.71 km) |
| Cwmbran to Rakitovo | 1,433.58 mi (2,307.13 km) |
| Cwmbran to Rakovski | 1,457.35 mi (2,345.39 km) |
| Cwmbran to Razgrad | 1,473.59 mi (2,371.51 km) |
| Cwmbran to Razlog | 1,412.57 mi (2,273.32 km) |
| Cwmbran to Ruse | 1,439.11 mi (2,316.03 km) |
| Cwmbran to Samokov | 1,397.29 mi (2,248.72 km) |
| Cwmbran to Sandanski | 1,418.49 mi (2,282.83 km) |
| Cwmbran to Sevlievo | 1,434.14 mi (2,308.03 km) |
| Cwmbran to Shumen | 1,500.53 mi (2,414.87 km) |
| Cwmbran to Silistra | 1,483.64 mi (2,387.69 km) |
| Cwmbran to Sliven | 1,498.47 mi (2,411.55 km) |
