| Killarney to Opwijk | 592.60 mi (953.69 km) |
| Killarney to Ostend | 535.25 mi (861.40 km) |
| Killarney to Oud-Heverlee | 615.20 mi (990.07 km) |
| Killarney to Oud-Turnhout | 621.76 mi (1,000.63 km) |
| Killarney to Oudenaarde | 569.67 mi (916.79 km) |
| Killarney to Oudenburg | 539.24 mi (867.83 km) |
| Killarney to Oupeye | 658.69 mi (1,060.07 km) |
| Killarney to Overijse | 610.35 mi (982.26 km) |
| Killarney to Overpelt | 641.46 mi (1,032.32 km) |
| Killarney to Paal | 633.55 mi (1,019.60 km) |
| Killarney to Peer | 644.16 mi (1,036.67 km) |
| Killarney to Pepinster | 668.50 mi (1,075.84 km) |
| Killarney to Peruwelz | 574.78 mi (925.01 km) |
| Killarney to Perwez | 625.00 mi (1,005.84 km) |
| Killarney to Philippeville | 621.85 mi (1,000.78 km) |
