| Gilbert to Octeville | 5,290.24 mi (8,513.82 km) |
| Gilbert to Oignies | 5,417.42 mi (8,718.49 km) |
| Gilbert to Oissel | 5,399.96 mi (8,690.39 km) |
| Gilbert to Olivet | 5,492.45 mi (8,839.24 km) |
| Gilbert to Ollioules | 5,849.51 mi (9,413.87 km) |
| Gilbert to Olonne-sur-Mer | 5,412.30 mi (8,710.26 km) |
| Gilbert to Oloron-Sainte-Marie | 5,597.64 mi (9,008.53 km) |
| Gilbert to Onet Village | 5,671.29 mi (9,127.06 km) |
| Gilbert to Onnaing | 5,441.54 mi (8,757.31 km) |
| Gilbert to Orange | 5,764.91 mi (9,277.73 km) |
| Gilbert to Orchies | 5,425.70 mi (8,731.83 km) |
| Gilbert to Orleans | 5,491.08 mi (8,837.04 km) |
| Gilbert to Orly | 5,471.80 mi (8,806.01 km) |
| Gilbert to Ormesson-sur-Marne | 5,475.11 mi (8,811.34 km) |
| Gilbert to Orsay | 5,466.52 mi (8,797.51 km) |
