| Truro to Octeville | 157.70 mi (253.80 km) |
| Truro to Oignies | 354.68 mi (570.81 km) |
| Truro to Oissel | 281.09 mi (452.36 km) |
| Truro to Olivet | 355.41 mi (571.97 km) |
| Truro to Ollioules | 711.89 mi (1,145.68 km) |
| Truro to Olonne-sur-Mer | 297.95 mi (479.51 km) |
| Truro to Oloron-Sainte-Marie | 531.40 mi (855.21 km) |
| Truro to Onet Village | 541.75 mi (871.86 km) |
| Truro to Onnaing | 381.42 mi (613.84 km) |
| Truro to Orange | 626.09 mi (1,007.60 km) |
| Truro to Orchies | 365.70 mi (588.53 km) |
| Truro to Orleans | 354.41 mi (570.36 km) |
| Truro to Orly | 349.87 mi (563.07 km) |
| Truro to Ormesson-sur-Marne | 355.12 mi (571.51 km) |
| Truro to Orsay | 342.23 mi (550.77 km) |
