| Troon to Octeville | 427.63 mi (688.21 km) |
| Troon to Oignies | 472.76 mi (760.83 km) |
| Troon to Oissel | 491.63 mi (791.19 km) |
| Troon to Olivet | 599.56 mi (964.90 km) |
| Troon to Ollioules | 976.24 mi (1,571.11 km) |
| Troon to Olonne-sur-Mer | 634.49 mi (1,021.10 km) |
| Troon to Oloron-Sainte-Marie | 871.91 mi (1,403.20 km) |
| Troon to Onet Village | 835.63 mi (1,344.81 km) |
| Troon to Onnaing | 494.17 mi (795.29 km) |
| Troon to Orange | 891.83 mi (1,435.26 km) |
| Troon to Orchies | 479.50 mi (771.68 km) |
| Troon to Orleans | 597.32 mi (961.29 km) |
| Troon to Orly | 556.09 mi (894.93 km) |
| Troon to Ormesson-sur-Marne | 556.90 mi (896.24 km) |
| Troon to Orsay | 554.26 mi (892.00 km) |
