| Isabela to Opwijk | 4,419.73 mi (7,112.87 km) |
| Isabela to Ostend | 4,365.89 mi (7,026.22 km) |
| Isabela to Oud-Heverlee | 4,440.43 mi (7,146.19 km) |
| Isabela to Oud-Turnhout | 4,455.30 mi (7,170.11 km) |
| Isabela to Oudenaarde | 4,393.98 mi (7,071.43 km) |
| Isabela to Oudenburg | 4,369.19 mi (7,031.54 km) |
| Isabela to Oupeye | 4,482.85 mi (7,214.45 km) |
| Isabela to Overijse | 4,434.49 mi (7,136.63 km) |
| Isabela to Overpelt | 4,473.82 mi (7,199.92 km) |
| Isabela to Paal | 4,462.91 mi (7,182.35 km) |
| Isabela to Peer | 4,475.26 mi (7,202.24 km) |
| Isabela to Pepinster | 4,490.28 mi (7,226.41 km) |
| Isabela to Peruwelz | 4,392.16 mi (7,068.50 km) |
| Isabela to Perwez | 4,446.45 mi (7,155.87 km) |
| Isabela to Philippeville | 4,433.90 mi (7,135.68 km) |
