| San Gwann to Octeville | 1,246.40 mi (2,005.88 km) |
| San Gwann to Oignies | 1,157.42 mi (1,862.69 km) |
| San Gwann to Oissel | 1,147.19 mi (1,846.23 km) |
| San Gwann to Olivet | 1,046.36 mi (1,683.96 km) |
| San Gwann to Ollioules | 678.35 mi (1,091.69 km) |
| San Gwann to Olonne-sur-Mer | 1,115.14 mi (1,794.64 km) |
| San Gwann to Oloron-Sainte-Marie | 946.07 mi (1,522.54 km) |
| San Gwann to Onet Village | 855.95 mi (1,377.52 km) |
| San Gwann to Onnaing | 1,138.10 mi (1,831.60 km) |
| San Gwann to Orange | 763.75 mi (1,229.14 km) |
| San Gwann to Orchies | 1,151.62 mi (1,853.36 km) |
| San Gwann to Orleans | 1,048.07 mi (1,686.71 km) |
| San Gwann to Orly | 1,077.63 mi (1,734.29 km) |
| San Gwann to Ormesson-sur-Marne | 1,075.73 mi (1,731.22 km) |
| San Gwann to Orsay | 1,081.13 mi (1,739.92 km) |
