| Gresham to Octeville | 4,966.69 mi (7,993.11 km) |
| Gresham to Oignies | 5,047.44 mi (8,123.07 km) |
| Gresham to Oissel | 5,058.44 mi (8,140.77 km) |
| Gresham to Olivet | 5,162.11 mi (8,307.62 km) |
| Gresham to Ollioules | 5,538.79 mi (8,913.82 km) |
| Gresham to Olonne-sur-Mer | 5,128.79 mi (8,253.99 km) |
| Gresham to Oloron-Sainte-Marie | 5,345.57 mi (8,602.87 km) |
| Gresham to Onet Village | 5,376.36 mi (8,652.41 km) |
| Gresham to Onnaing | 5,067.78 mi (8,155.80 km) |
| Gresham to Orange | 5,452.55 mi (8,775.03 km) |
| Gresham to Orchies | 5,053.70 mi (8,133.15 km) |
| Gresham to Orleans | 5,160.21 mi (8,304.56 km) |
| Gresham to Orly | 5,126.97 mi (8,251.06 km) |
| Gresham to Ormesson-sur-Marne | 5,128.60 mi (8,253.69 km) |
| Gresham to Orsay | 5,123.90 mi (8,246.12 km) |
