| Cities | Distance |
|---|---|
| Grefrath to Opwijk | 96.93 mi (155.99 km) |
| Grefrath to Ostend | 148.05 mi (238.26 km) |
| Grefrath to Oud-Heverlee | 80.54 mi (129.62 km) |
| Grefrath to Oud-Turnhout | 58.63 mi (94.35 km) |
| Grefrath to Oudenaarde | 123.58 mi (198.89 km) |
| Grefrath to Oudenburg | 144.82 mi (233.07 km) |
| Grefrath to Oupeye | 52.94 mi (85.19 km) |
| Grefrath to Overijse | 87.29 mi (140.49 km) |
| Grefrath to Overpelt | 40.79 mi (65.64 km) |
| Grefrath to Paal | 54.59 mi (87.85 km) |
| Grefrath to Peer | 40.88 mi (65.78 km) |
| Grefrath to Pepinster | 57.86 mi (93.12 km) |
| Grefrath to Peruwelz | 132.76 mi (213.66 km) |
| Grefrath to Perwez | 82.62 mi (132.97 km) |
| Grefrath to Philippeville | 110.84 mi (178.39 km) |