| Niscemi to Octeville | 1,174.42 mi (1,890.05 km) |
| Niscemi to Oignies | 1,078.62 mi (1,735.86 km) |
| Niscemi to Oissel | 1,072.37 mi (1,725.82 km) |
| Niscemi to Olivet | 973.32 mi (1,566.41 km) |
| Niscemi to Ollioules | 611.38 mi (983.93 km) |
| Niscemi to Olonne-sur-Mer | 1,051.10 mi (1,691.58 km) |
| Niscemi to Oloron-Sainte-Marie | 892.97 mi (1,437.09 km) |
| Niscemi to Onet Village | 791.88 mi (1,274.41 km) |
| Niscemi to Onnaing | 1,058.72 mi (1,703.85 km) |
| Niscemi to Orange | 695.55 mi (1,119.39 km) |
| Niscemi to Orchies | 1,072.53 mi (1,726.07 km) |
| Niscemi to Orleans | 974.93 mi (1,569.00 km) |
| Niscemi to Orly | 1,002.15 mi (1,612.80 km) |
| Niscemi to Ormesson-sur-Marne | 999.97 mi (1,609.29 km) |
| Niscemi to Orsay | 1,006.01 mi (1,619.02 km) |
