| Bolu to Opwijk | 1,484.95 mi (2,389.80 km) |
| Bolu to Ostend | 1,542.63 mi (2,482.63 km) |
| Bolu to Oud-Heverlee | 1,462.08 mi (2,352.98 km) |
| Bolu to Oud-Turnhout | 1,459.83 mi (2,349.37 km) |
| Bolu to Oudenaarde | 1,506.84 mi (2,425.03 km) |
| Bolu to Oudenburg | 1,538.45 mi (2,475.89 km) |
| Bolu to Oupeye | 1,418.87 mi (2,283.46 km) |
| Bolu to Overijse | 1,466.56 mi (2,360.20 km) |
| Bolu to Overpelt | 1,439.86 mi (2,317.23 km) |
| Bolu to Paal | 1,445.72 mi (2,326.67 km) |
| Bolu to Peer | 1,436.39 mi (2,311.64 km) |
| Bolu to Pepinster | 1,408.51 mi (2,266.77 km) |
| Bolu to Peruwelz | 1,501.08 mi (2,415.75 km) |
| Bolu to Perwez | 1,451.47 mi (2,335.92 km) |
| Bolu to Philippeville | 1,454.07 mi (2,340.10 km) |
