| Castrolibero to Octeville | 1,127.03 mi (1,813.78 km) |
| Castrolibero to Oignies | 1,002.72 mi (1,613.72 km) |
| Castrolibero to Oissel | 1,015.05 mi (1,633.57 km) |
| Castrolibero to Olivet | 925.22 mi (1,488.99 km) |
| Castrolibero to Ollioules | 598.75 mi (963.59 km) |
| Castrolibero to Olonne-sur-Mer | 1,033.69 mi (1,663.56 km) |
| Castrolibero to Oloron-Sainte-Marie | 911.34 mi (1,466.65 km) |
| Castrolibero to Onet Village | 781.10 mi (1,257.06 km) |
| Castrolibero to Onnaing | 980.14 mi (1,577.38 km) |
| Castrolibero to Orange | 674.36 mi (1,085.28 km) |
| Castrolibero to Orchies | 995.26 mi (1,601.72 km) |
| Castrolibero to Orleans | 926.40 mi (1,490.90 km) |
| Castrolibero to Orly | 943.17 mi (1,517.88 km) |
| Castrolibero to Ormesson-sur-Marne | 939.81 mi (1,512.48 km) |
| Castrolibero to Orsay | 948.56 mi (1,526.57 km) |
