| Oulunsalo to Opwijk | 1,227.35 mi (1,975.23 km) |
| Oulunsalo to Ostend | 1,240.22 mi (1,995.94 km) |
| Oulunsalo to Oud-Heverlee | 1,224.85 mi (1,971.21 km) |
| Oulunsalo to Oud-Turnhout | 1,189.04 mi (1,913.57 km) |
| Oulunsalo to Oudenaarde | 1,247.15 mi (2,007.10 km) |
| Oulunsalo to Oudenburg | 1,240.89 mi (1,997.02 km) |
| Oulunsalo to Oupeye | 1,211.74 mi (1,950.11 km) |
| Oulunsalo to Overijse | 1,230.73 mi (1,980.67 km) |
| Oulunsalo to Overpelt | 1,185.75 mi (1,908.29 km) |
| Oulunsalo to Paal | 1,201.63 mi (1,933.84 km) |
| Oulunsalo to Peer | 1,190.03 mi (1,915.16 km) |
| Oulunsalo to Pepinster | 1,216.77 mi (1,958.20 km) |
| Oulunsalo to Peruwelz | 1,267.41 mi (2,039.70 km) |
| Oulunsalo to Perwez | 1,234.28 mi (1,986.39 km) |
| Oulunsalo to Philippeville | 1,265.58 mi (2,036.75 km) |
