| Silver Spring to Octeville | 3,638.42 mi (5,855.47 km) |
| Silver Spring to Oignies | 3,811.69 mi (6,134.32 km) |
| Silver Spring to Oissel | 3,760.54 mi (6,052.01 km) |
| Silver Spring to Olivet | 3,832.37 mi (6,167.61 km) |
| Silver Spring to Ollioules | 4,142.18 mi (6,666.20 km) |
| Silver Spring to Olonne-sur-Mer | 3,705.87 mi (5,964.03 km) |
| Silver Spring to Oloron-Sainte-Marie | 3,846.88 mi (6,190.96 km) |
| Silver Spring to Onet Village | 3,959.14 mi (6,371.62 km) |
| Silver Spring to Onnaing | 3,838.51 mi (6,177.49 km) |
| Silver Spring to Orange | 4,064.97 mi (6,541.94 km) |
| Silver Spring to Orchies | 3,821.82 mi (6,150.62 km) |
| Silver Spring to Orleans | 3,831.72 mi (6,166.57 km) |
| Silver Spring to Orly | 3,830.48 mi (6,164.56 km) |
| Silver Spring to Ormesson-sur-Marne | 3,835.54 mi (6,172.71 km) |
| Silver Spring to Orsay | 3,822.98 mi (6,152.49 km) |
