| Llantwit Major to Octeville | 146.93 mi (236.46 km) |
| Llantwit Major to Oignies | 288.88 mi (464.91 km) |
| Llantwit Major to Oissel | 246.57 mi (396.82 km) |
| Llantwit Major to Olivet | 343.00 mi (552.00 km) |
| Llantwit Major to Ollioules | 717.99 mi (1,155.49 km) |
| Llantwit Major to Olonne-sur-Mer | 345.21 mi (555.56 km) |
| Llantwit Major to Oloron-Sainte-Marie | 582.97 mi (938.20 km) |
| Llantwit Major to Onet Village | 561.43 mi (903.53 km) |
| Llantwit Major to Onnaing | 316.03 mi (508.60 km) |
| Llantwit Major to Orange | 631.75 mi (1,016.70 km) |
| Llantwit Major to Orchies | 299.42 mi (481.87 km) |
| Llantwit Major to Orleans | 341.30 mi (549.27 km) |
| Llantwit Major to Orly | 318.50 mi (512.57 km) |
| Llantwit Major to Ormesson-sur-Marne | 322.05 mi (518.29 km) |
| Llantwit Major to Orsay | 313.09 mi (503.87 km) |
