| Great Missenden to Octeville | 149.25 mi (240.20 km) |
| Great Missenden to Oignies | 181.87 mi (292.69 km) |
| Great Missenden to Oissel | 181.33 mi (291.83 km) |
| Great Missenden to Olivet | 289.69 mi (466.20 km) |
| Great Missenden to Ollioules | 665.76 mi (1,071.43 km) |
| Great Missenden to Olonne-sur-Mer | 360.30 mi (579.85 km) |
| Great Missenden to Oloron-Sainte-Marie | 588.00 mi (946.30 km) |
| Great Missenden to Onet Village | 529.35 mi (851.90 km) |
| Great Missenden to Onnaing | 207.94 mi (334.65 km) |
| Great Missenden to Orange | 581.44 mi (935.73 km) |
| Great Missenden to Orchies | 191.36 mi (307.96 km) |
| Great Missenden to Orleans | 287.38 mi (462.49 km) |
| Great Missenden to Orly | 246.16 mi (396.16 km) |
| Great Missenden to Ormesson-sur-Marne | 247.40 mi (398.15 km) |
| Great Missenden to Orsay | 243.96 mi (392.61 km) |
