| Aberystwyth to Opwijk | 367.59 mi (591.58 km) |
| Aberystwyth to Ostend | 309.91 mi (498.75 km) |
| Aberystwyth to Oud-Heverlee | 390.52 mi (628.48 km) |
| Aberystwyth to Oud-Turnhout | 393.82 mi (633.79 km) |
| Aberystwyth to Oudenaarde | 346.49 mi (557.61 km) |
| Aberystwyth to Oudenburg | 314.14 mi (505.56 km) |
| Aberystwyth to Oupeye | 433.61 mi (697.83 km) |
| Aberystwyth to Overijse | 386.23 mi (621.57 km) |
| Aberystwyth to Overpelt | 413.70 mi (665.79 km) |
| Aberystwyth to Paal | 406.96 mi (654.94 km) |
| Aberystwyth to Peer | 416.80 mi (670.78 km) |
| Aberystwyth to Pepinster | 444.11 mi (714.73 km) |
| Aberystwyth to Peruwelz | 354.78 mi (570.96 km) |
| Aberystwyth to Perwez | 401.66 mi (646.41 km) |
| Aberystwyth to Philippeville | 402.65 mi (648.00 km) |
