| Pen-y-Bont ar Ogwr to Devnya | 1,551.61 mi (2,497.08 km) |
| Pen-y-Bont ar Ogwr to Dimitrovgrad | 1,513.95 mi (2,436.46 km) |
| Pen-y-Bont ar Ogwr to Dobrich | 1,550.06 mi (2,494.58 km) |
| Pen-y-Bont ar Ogwr to Dospat | 1,470.87 mi (2,367.14 km) |
| Pen-y-Bont ar Ogwr to Dupnitsa | 1,402.30 mi (2,256.78 km) |
| Pen-y-Bont ar Ogwr to Elhovo | 1,549.73 mi (2,494.06 km) |
| Pen-y-Bont ar Ogwr to Etropole | 1,416.08 mi (2,278.97 km) |
| Pen-y-Bont ar Ogwr to Gabrovo | 1,470.58 mi (2,366.66 km) |
| Pen-y-Bont ar Ogwr to Gorna Oryahovitsa | 1,475.79 mi (2,375.06 km) |
| Pen-y-Bont ar Ogwr to Gotse Delchev | 1,456.53 mi (2,344.06 km) |
| Pen-y-Bont ar Ogwr to Harmanli | 1,531.17 mi (2,464.17 km) |
| Pen-y-Bont ar Ogwr to Haskovo | 1,517.27 mi (2,441.80 km) |
| Pen-y-Bont ar Ogwr to Ihtiman | 1,424.17 mi (2,291.98 km) |
| Pen-y-Bont ar Ogwr to Isperih | 1,502.09 mi (2,417.38 km) |
| Pen-y-Bont ar Ogwr to Kardzhali | 1,520.50 mi (2,447.01 km) |
