| Gilbert to Opwijk | 5,435.62 mi (8,747.79 km) |
| Gilbert to Ostend | 5,381.92 mi (8,661.36 km) |
| Gilbert to Oud-Heverlee | 5,457.67 mi (8,783.27 km) |
| Gilbert to Oud-Turnhout | 5,446.49 mi (8,765.29 km) |
| Gilbert to Oudenaarde | 5,421.25 mi (8,724.65 km) |
| Gilbert to Oudenburg | 5,386.48 mi (8,668.70 km) |
| Gilbert to Oupeye | 5,495.66 mi (8,844.41 km) |
| Gilbert to Overijse | 5,455.46 mi (8,779.71 km) |
| Gilbert to Overpelt | 5,465.21 mi (8,795.41 km) |
| Gilbert to Paal | 5,465.20 mi (8,795.38 km) |
| Gilbert to Peer | 5,470.21 mi (8,803.46 km) |
| Gilbert to Pepinster | 5,507.82 mi (8,863.98 km) |
| Gilbert to Peruwelz | 5,435.36 mi (8,747.36 km) |
| Gilbert to Perwez | 5,471.97 mi (8,806.29 km) |
| Gilbert to Philippeville | 5,482.07 mi (8,822.54 km) |
