| Megara to Octeville | 1,471.72 mi (2,368.51 km) |
| Megara to Oignies | 1,317.97 mi (2,121.07 km) |
| Megara to Oissel | 1,352.34 mi (2,176.38 km) |
| Megara to Olivet | 1,274.67 mi (2,051.38 km) |
| Megara to Ollioules | 982.38 mi (1,580.99 km) |
| Megara to Olonne-sur-Mer | 1,405.28 mi (2,261.58 km) |
| Megara to Oloron-Sainte-Marie | 1,301.80 mi (2,095.04 km) |
| Megara to Onet Village | 1,161.28 mi (1,868.90 km) |
| Megara to Onnaing | 1,292.67 mi (2,080.36 km) |
| Megara to Orange | 1,051.59 mi (1,692.37 km) |
| Megara to Orchies | 1,308.97 mi (2,106.58 km) |
| Megara to Orleans | 1,275.42 mi (2,052.59 km) |
| Megara to Orly | 1,281.01 mi (2,061.59 km) |
| Megara to Ormesson-sur-Marne | 1,276.50 mi (2,054.33 km) |
| Megara to Orsay | 1,287.87 mi (2,072.62 km) |
