| Gardner to Octeville | 4,376.87 mi (7,043.89 km) |
| Gardner to Oignies | 4,523.98 mi (7,280.64 km) |
| Gardner to Oissel | 4,492.72 mi (7,230.33 km) |
| Gardner to Olivet | 4,577.93 mi (7,367.47 km) |
| Gardner to Ollioules | 4,919.39 mi (7,916.99 km) |
| Gardner to Olonne-sur-Mer | 4,478.83 mi (7,207.99 km) |
| Gardner to Oloron-Sainte-Marie | 4,648.68 mi (7,481.33 km) |
| Gardner to Onet Village | 4,737.80 mi (7,624.76 km) |
| Gardner to Onnaing | 4,549.49 mi (7,321.70 km) |
| Gardner to Orange | 4,837.04 mi (7,784.46 km) |
| Gardner to Orchies | 4,533.12 mi (7,295.34 km) |
| Gardner to Orleans | 4,576.83 mi (7,365.70 km) |
| Gardner to Orly | 4,564.58 mi (7,345.98 km) |
| Gardner to Ormesson-sur-Marne | 4,568.63 mi (7,352.50 km) |
| Gardner to Orsay | 4,558.35 mi (7,335.95 km) |
