| Humacao to Octeville | 4,120.60 mi (6,631.46 km) |
| Humacao to Oignies | 4,331.20 mi (6,970.39 km) |
| Humacao to Oissel | 4,240.39 mi (6,824.24 km) |
| Humacao to Olivet | 4,269.24 mi (6,870.68 km) |
| Humacao to Ollioules | 4,453.87 mi (7,167.82 km) |
| Humacao to Olonne-sur-Mer | 4,089.71 mi (6,581.75 km) |
| Humacao to Oloron-Sainte-Marie | 4,128.81 mi (6,644.68 km) |
| Humacao to Onet Village | 4,291.47 mi (6,906.45 km) |
| Humacao to Onnaing | 4,357.34 mi (7,012.47 km) |
| Humacao to Orange | 4,400.98 mi (7,082.69 km) |
| Humacao to Orchies | 4,342.22 mi (6,988.12 km) |
| Humacao to Orleans | 4,269.81 mi (6,871.59 km) |
| Humacao to Orly | 4,295.87 mi (6,913.54 km) |
| Humacao to Ormesson-sur-Marne | 4,302.68 mi (6,924.49 km) |
| Humacao to Orsay | 4,286.32 mi (6,898.16 km) |
