| Pen-y-Bont ar Ogwr to Nasaud | 1,283.35 mi (2,065.35 km) |
| Pen-y-Bont ar Ogwr to Navodari | 1,556.56 mi (2,505.05 km) |
| Pen-y-Bont ar Ogwr to Negresti-Oas | 1,225.46 mi (1,972.19 km) |
| Pen-y-Bont ar Ogwr to Nehoiu | 1,423.07 mi (2,290.21 km) |
| Pen-y-Bont ar Ogwr to Ocna Mures | 1,285.74 mi (2,069.19 km) |
| Pen-y-Bont ar Ogwr to Odobesti | 1,442.47 mi (2,321.42 km) |
| Pen-y-Bont ar Ogwr to Odorheiu Secuiesc | 1,349.84 mi (2,172.36 km) |
| Pen-y-Bont ar Ogwr to Oltenita | 1,480.43 mi (2,382.53 km) |
| Pen-y-Bont ar Ogwr to Onesti | 1,414.51 mi (2,276.44 km) |
| Pen-y-Bont ar Ogwr to Oradea | 1,182.59 mi (1,903.19 km) |
| Pen-y-Bont ar Ogwr to Orastie | 1,274.33 mi (2,050.84 km) |
| Pen-y-Bont ar Ogwr to Oravita | 1,237.07 mi (1,990.87 km) |
| Pen-y-Bont ar Ogwr to Orsova | 1,278.10 mi (2,056.90 km) |
| Pen-y-Bont ar Ogwr to Otelu Rosu | 1,249.07 mi (2,010.19 km) |
| Pen-y-Bont ar Ogwr to Otopeni | 1,440.04 mi (2,317.52 km) |
