| Half Moon Bay to Octeville | 5,420.33 mi (8,723.17 km) |
| Half Moon Bay to Oignies | 5,516.71 mi (8,878.29 km) |
| Half Moon Bay to Oissel | 5,518.65 mi (8,881.41 km) |
| Half Moon Bay to Olivet | 5,619.37 mi (9,043.50 km) |
| Half Moon Bay to Ollioules | 5,992.10 mi (9,643.35 km) |
| Half Moon Bay to Olonne-sur-Mer | 5,569.96 mi (8,963.99 km) |
| Half Moon Bay to Oloron-Sainte-Marie | 5,777.27 mi (9,297.62 km) |
| Half Moon Bay to Onet Village | 5,823.23 mi (9,371.58 km) |
| Half Moon Bay to Onnaing | 5,538.37 mi (8,913.15 km) |
| Half Moon Bay to Orange | 5,905.83 mi (9,504.51 km) |
| Half Moon Bay to Orchies | 5,523.65 mi (8,889.46 km) |
| Half Moon Bay to Orleans | 5,617.63 mi (9,040.70 km) |
| Half Moon Bay to Orly | 5,588.72 mi (8,994.18 km) |
| Half Moon Bay to Ormesson-sur-Marne | 5,590.91 mi (8,997.71 km) |
| Half Moon Bay to Orsay | 5,584.92 mi (8,988.05 km) |
