| Mamoudzou to Orbetello | 4,382.56 mi (7,053.05 km) |
| Mamoudzou to Oria | 4,083.32 mi (6,571.47 km) |
| Mamoudzou to Oristano | 4,333.24 mi (6,973.68 km) |
| Mamoudzou to Orta Nova | 4,185.76 mi (6,736.33 km) |
| Mamoudzou to Orte | 4,347.69 mi (6,996.94 km) |
| Mamoudzou to Ortona | 4,281.88 mi (6,891.02 km) |
| Mamoudzou to Orvieto | 4,370.37 mi (7,033.43 km) |
| Mamoudzou to Orzinuovi | 4,583.25 mi (7,376.02 km) |
| Mamoudzou to Osimo | 4,372.65 mi (7,037.10 km) |
| Mamoudzou to Ospitaletto | 4,587.55 mi (7,382.95 km) |
| Mamoudzou to Ostuni | 4,098.41 mi (6,595.75 km) |
| Mamoudzou to Ottaviano | 4,194.37 mi (6,750.18 km) |
| Mamoudzou to Ovada | 4,581.49 mi (7,373.20 km) |
| Mamoudzou to Ozieri | 4,354.74 mi (7,008.28 km) |
| Mamoudzou to Paceco | 4,095.71 mi (6,591.41 km) |
