| Cities | Distance |
|---|---|
| Groslay to Opwijk | 159.34 mi (256.43 km) |
| Groslay to Ostend | 156.79 mi (252.33 km) |
| Groslay to Oud-Heverlee | 164.17 mi (264.20 km) |
| Groslay to Oud-Turnhout | 198.88 mi (320.07 km) |
| Groslay to Oudenaarde | 140.33 mi (225.84 km) |
| Groslay to Oudenburg | 154.53 mi (248.69 km) |
| Groslay to Oupeye | 189.04 mi (304.23 km) |
| Groslay to Overijse | 157.80 mi (253.95 km) |
| Groslay to Overpelt | 205.58 mi (330.85 km) |
| Groslay to Paal | 189.40 mi (304.81 km) |
| Groslay to Peer | 202.47 mi (325.84 km) |
| Groslay to Pepinster | 189.49 mi (304.96 km) |
| Groslay to Peruwelz | 119.30 mi (192.00 km) |
| Groslay to Perwez | 157.90 mi (254.11 km) |
| Groslay to Philippeville | 129.55 mi (208.49 km) |