| Calexico to Octeville | 5,457.79 mi (8,783.46 km) |
| Calexico to Oignies | 5,578.30 mi (8,977.40 km) |
| Calexico to Oissel | 5,565.23 mi (8,956.37 km) |
| Calexico to Olivet | 5,659.79 mi (9,108.55 km) |
| Calexico to Ollioules | 6,021.12 mi (9,690.06 km) |
| Calexico to Olonne-sur-Mer | 5,586.14 mi (8,990.02 km) |
| Calexico to Oloron-Sainte-Marie | 5,776.47 mi (9,296.33 km) |
| Calexico to Onet Village | 5,844.50 mi (9,405.82 km) |
| Calexico to Onnaing | 5,601.91 mi (9,015.41 km) |
| Calexico to Orange | 5,935.97 mi (9,553.02 km) |
| Calexico to Orchies | 5,586.29 mi (8,990.27 km) |
| Calexico to Orleans | 5,658.33 mi (9,106.20 km) |
| Calexico to Orly | 5,636.85 mi (9,071.63 km) |
| Calexico to Ormesson-sur-Marne | 5,639.92 mi (9,076.57 km) |
| Calexico to Orsay | 5,631.89 mi (9,063.64 km) |
