| Oak Grove to Opwijk | 5,060.61 mi (8,144.27 km) |
| Oak Grove to Ostend | 5,013.69 mi (8,068.75 km) |
| Oak Grove to Oud-Heverlee | 5,080.40 mi (8,176.12 km) |
| Oak Grove to Oud-Turnhout | 5,061.22 mi (8,145.25 km) |
| Oak Grove to Oudenaarde | 5,052.15 mi (8,130.65 km) |
| Oak Grove to Oudenburg | 5,018.13 mi (8,075.89 km) |
| Oak Grove to Oupeye | 5,112.10 mi (8,227.13 km) |
| Oak Grove to Overijse | 5,079.82 mi (8,175.17 km) |
| Oak Grove to Overpelt | 5,077.70 mi (8,171.76 km) |
| Oak Grove to Paal | 5,081.60 mi (8,178.05 km) |
| Oak Grove to Peer | 5,083.36 mi (8,180.87 km) |
| Oak Grove to Pepinster | 5,124.48 mi (8,247.05 km) |
| Oak Grove to Peruwelz | 5,070.29 mi (8,159.84 km) |
| Oak Grove to Perwez | 5,095.93 mi (8,201.11 km) |
| Oak Grove to Philippeville | 5,113.00 mi (8,228.58 km) |
