| Grantsville to Octeville | 4,924.54 mi (7,925.28 km) |
| Grantsville to Oignies | 5,035.85 mi (8,104.42 km) |
| Grantsville to Oissel | 5,028.49 mi (8,092.58 km) |
| Grantsville to Olivet | 5,125.74 mi (8,249.08 km) |
| Grantsville to Ollioules | 5,492.64 mi (8,839.54 km) |
| Grantsville to Olonne-sur-Mer | 5,062.48 mi (8,147.28 km) |
| Grantsville to Oloron-Sainte-Marie | 5,261.32 mi (8,467.27 km) |
| Grantsville to Onet Village | 5,319.08 mi (8,560.23 km) |
| Grantsville to Onnaing | 5,058.80 mi (8,141.36 km) |
| Grantsville to Orange | 5,406.82 mi (8,701.44 km) |
| Grantsville to Orchies | 5,043.48 mi (8,116.70 km) |
| Grantsville to Orleans | 5,124.16 mi (8,246.54 km) |
| Grantsville to Orly | 5,099.65 mi (8,207.09 km) |
| Grantsville to Ormesson-sur-Marne | 5,102.38 mi (8,211.48 km) |
| Grantsville to Orsay | 5,095.13 mi (8,199.82 km) |
