| Mangalia to Octeville | 1,475.73 mi (2,374.95 km) |
| Mangalia to Oignies | 1,279.51 mi (2,059.17 km) |
| Mangalia to Oissel | 1,351.74 mi (2,175.41 km) |
| Mangalia to Olivet | 1,307.43 mi (2,104.11 km) |
| Mangalia to Ollioules | 1,137.27 mi (1,830.26 km) |
| Mangalia to Olonne-sur-Mer | 1,481.08 mi (2,383.57 km) |
| Mangalia to Oloron-Sainte-Marie | 1,455.82 mi (2,342.91 km) |
| Mangalia to Onet Village | 1,284.85 mi (2,067.76 km) |
| Mangalia to Onnaing | 1,252.32 mi (2,015.41 km) |
| Mangalia to Orange | 1,178.09 mi (1,895.95 km) |
| Mangalia to Orchies | 1,268.78 mi (2,041.90 km) |
| Mangalia to Orleans | 1,307.16 mi (2,103.66 km) |
| Mangalia to Orly | 1,289.00 mi (2,074.45 km) |
| Mangalia to Ormesson-sur-Marne | 1,282.69 mi (2,064.28 km) |
| Mangalia to Orsay | 1,298.03 mi (2,088.98 km) |
