| Aci Castello to Octeville | 1,178.71 mi (1,896.95 km) |
| Aci Castello to Oignies | 1,074.34 mi (1,728.98 km) |
| Aci Castello to Oissel | 1,073.55 mi (1,727.71 km) |
| Aci Castello to Olivet | 976.83 mi (1,572.06 km) |
| Aci Castello to Ollioules | 622.73 mi (1,002.19 km) |
| Aci Castello to Olonne-sur-Mer | 1,063.39 mi (1,711.36 km) |
| Aci Castello to Oloron-Sainte-Marie | 914.17 mi (1,471.21 km) |
| Aci Castello to Onet Village | 804.95 mi (1,295.44 km) |
| Aci Castello to Onnaing | 1,053.58 mi (1,695.57 km) |
| Aci Castello to Orange | 705.22 mi (1,134.93 km) |
| Aci Castello to Orchies | 1,067.82 mi (1,718.50 km) |
| Aci Castello to Orleans | 978.33 mi (1,574.47 km) |
| Aci Castello to Orly | 1,002.63 mi (1,613.58 km) |
| Aci Castello to Ormesson-sur-Marne | 1,000.10 mi (1,609.51 km) |
| Aci Castello to Orsay | 1,006.95 mi (1,620.53 km) |
