| Rhondda to Devnya | 1,546.04 mi (2,488.11 km) |
| Rhondda to Dimitrovgrad | 1,509.10 mi (2,428.66 km) |
| Rhondda to Dobrich | 1,544.34 mi (2,485.37 km) |
| Rhondda to Dospat | 1,466.44 mi (2,360.01 km) |
| Rhondda to Dupnitsa | 1,397.85 mi (2,249.63 km) |
| Rhondda to Elhovo | 1,544.68 mi (2,485.92 km) |
| Rhondda to Etropole | 1,411.26 mi (2,271.20 km) |
| Rhondda to Gabrovo | 1,465.49 mi (2,358.48 km) |
| Rhondda to Gorna Oryahovitsa | 1,470.55 mi (2,366.62 km) |
| Rhondda to Gotse Delchev | 1,452.22 mi (2,337.12 km) |
| Rhondda to Harmanli | 1,526.30 mi (2,456.35 km) |
| Rhondda to Haskovo | 1,512.47 mi (2,434.08 km) |
| Rhondda to Ihtiman | 1,419.52 mi (2,284.50 km) |
| Rhondda to Isperih | 1,496.47 mi (2,408.33 km) |
| Rhondda to Kardzhali | 1,515.83 mi (2,439.50 km) |
