| Cities | Distance |
|---|---|
| Donegal to Opwijk | 572.10 mi (920.70 km) |
| Donegal to Ostend | 515.96 mi (830.35 km) |
| Donegal to Oud-Heverlee | 594.89 mi (957.38 km) |
| Donegal to Oud-Turnhout | 590.28 mi (949.97 km) |
| Donegal to Oudenaarde | 554.82 mi (892.89 km) |
| Donegal to Oudenburg | 520.47 mi (837.61 km) |
| Donegal to Oupeye | 635.91 mi (1,023.40 km) |
| Donegal to Overijse | 591.73 mi (952.29 km) |
| Donegal to Overpelt | 610.06 mi (981.80 km) |
| Donegal to Paal | 606.71 mi (976.40 km) |
| Donegal to Peer | 614.23 mi (988.50 km) |
| Donegal to Pepinster | 647.47 mi (1,042.00 km) |
| Donegal to Peruwelz | 567.02 mi (912.53 km) |
| Donegal to Perwez | 608.01 mi (978.50 km) |
| Donegal to Philippeville | 614.49 mi (988.93 km) |