| Gantt to Octeville | 4,053.34 mi (6,523.22 km) |
| Gantt to Oignies | 4,227.58 mi (6,803.63 km) |
| Gantt to Oissel | 4,175.68 mi (6,720.11 km) |
| Gantt to Olivet | 4,246.64 mi (6,834.30 km) |
| Gantt to Ollioules | 4,553.01 mi (7,327.36 km) |
| Gantt to Olonne-sur-Mer | 4,117.92 mi (6,627.15 km) |
| Gantt to Oloron-Sainte-Marie | 4,254.81 mi (6,847.46 km) |
| Gantt to Onet Village | 4,370.10 mi (7,032.99 km) |
| Gantt to Onnaing | 4,254.43 mi (6,846.84 km) |
| Gantt to Orange | 4,476.53 mi (7,204.27 km) |
| Gantt to Orchies | 4,237.74 mi (6,819.98 km) |
| Gantt to Orleans | 4,246.02 mi (6,833.31 km) |
| Gantt to Orly | 4,245.46 mi (6,832.40 km) |
| Gantt to Ormesson-sur-Marne | 4,250.57 mi (6,840.63 km) |
| Gantt to Orsay | 4,237.89 mi (6,820.23 km) |
