| Allentown to Octeville | 3,506.49 mi (5,643.16 km) |
| Allentown to Oignies | 3,678.35 mi (5,919.74 km) |
| Allentown to Oissel | 3,628.33 mi (5,839.23 km) |
| Allentown to Olivet | 3,701.14 mi (5,956.41 km) |
| Allentown to Ollioules | 4,013.84 mi (6,459.65 km) |
| Allentown to Olonne-sur-Mer | 3,576.68 mi (5,756.10 km) |
| Allentown to Oloron-Sainte-Marie | 3,720.68 mi (5,987.86 km) |
| Allentown to Onet Village | 3,830.74 mi (6,164.97 km) |
| Allentown to Onnaing | 3,705.13 mi (5,962.83 km) |
| Allentown to Orange | 3,936.09 mi (6,334.52 km) |
| Allentown to Orchies | 3,688.44 mi (5,935.97 km) |
| Allentown to Orleans | 3,700.46 mi (5,955.31 km) |
| Allentown to Orly | 3,698.46 mi (5,952.10 km) |
| Allentown to Ormesson-sur-Marne | 3,703.47 mi (5,960.15 km) |
| Allentown to Orsay | 3,691.04 mi (5,940.15 km) |
