| Pontypridd to Oberkirch | 548.53 mi (882.77 km) |
| Pontypridd to Obernburg am Main | 558.72 mi (899.17 km) |
| Pontypridd to Obernkirchen | 532.11 mi (856.35 km) |
| Pontypridd to Oberschleissheim | 700.92 mi (1,128.03 km) |
| Pontypridd to Oberstdorf | 674.93 mi (1,086.19 km) |
| Pontypridd to Obertraubling | 707.01 mi (1,137.83 km) |
| Pontypridd to Obertshausen | 541.10 mi (870.82 km) |
| Pontypridd to Oberursel | 527.63 mi (849.14 km) |
| Pontypridd to Ochsenfurt | 602.06 mi (968.93 km) |
| Pontypridd to Ochsenhausen | 639.32 mi (1,028.89 km) |
| Pontypridd to Ochtrup | 450.52 mi (725.04 km) |
| Pontypridd to Odenthal | 452.96 mi (728.96 km) |
| Pontypridd to Oelde | 491.67 mi (791.27 km) |
| Pontypridd to Oelsnitz | 677.86 mi (1,090.91 km) |
| Pontypridd to Oer-Erkenschwick | 454.00 mi (730.65 km) |
