| Delaware to Opwijk | 4,029.19 mi (6,484.35 km) |
| Delaware to Ostend | 3,972.04 mi (6,392.39 km) |
| Delaware to Oud-Heverlee | 4,052.15 mi (6,521.30 km) |
| Delaware to Oud-Turnhout | 4,049.38 mi (6,516.84 km) |
| Delaware to Oudenaarde | 4,009.97 mi (6,453.43 km) |
| Delaware to Oudenburg | 3,976.46 mi (6,399.49 km) |
| Delaware to Oupeye | 4,094.06 mi (6,588.75 km) |
| Delaware to Overijse | 4,048.50 mi (6,515.44 km) |
| Delaware to Overpelt | 4,069.21 mi (6,548.77 km) |
| Delaware to Paal | 4,065.36 mi (6,542.57 km) |
| Delaware to Peer | 4,073.28 mi (6,555.30 km) |
| Delaware to Pepinster | 4,105.33 mi (6,606.88 km) |
| Delaware to Peruwelz | 4,019.50 mi (6,468.76 km) |
| Delaware to Perwez | 4,064.47 mi (6,541.14 km) |
| Delaware to Philippeville | 4,067.40 mi (6,545.85 km) |
