| Silistra to Oignies | 1,212.18 mi (1,950.82 km) |
| Silistra to Oissel | 1,283.52 mi (2,065.63 km) |
| Silistra to Olivet | 1,238.65 mi (1,993.41 km) |
| Silistra to Ollioules | 1,070.04 mi (1,722.06 km) |
| Silistra to Olonne-sur-Mer | 1,412.14 mi (2,272.62 km) |
| Silistra to Oloron-Sainte-Marie | 1,387.85 mi (2,233.54 km) |
| Silistra to Onet Village | 1,216.48 mi (1,957.73 km) |
| Silistra to Onnaing | 1,184.99 mi (1,907.05 km) |
| Silistra to Orange | 1,109.96 mi (1,786.31 km) |
| Silistra to Orchies | 1,201.48 mi (1,933.60 km) |
| Silistra to Orleans | 1,238.38 mi (1,992.98 km) |
| Silistra to Orly | 1,220.54 mi (1,964.26 km) |
| Silistra to Ormesson-sur-Marne | 1,214.24 mi (1,954.14 km) |
| Silistra to Orsay | 1,229.54 mi (1,978.75 km) |
| Silistra to Orthez | 1,391.73 mi (2,239.77 km) |
