| Mealhada to Octeville | 719.34 mi (1,157.67 km) |
| Mealhada to Oignies | 888.70 mi (1,430.22 km) |
| Mealhada to Oissel | 774.25 mi (1,246.03 km) |
| Mealhada to Olivet | 727.26 mi (1,170.42 km) |
| Mealhada to Ollioules | 759.99 mi (1,223.09 km) |
| Mealhada to Olonne-sur-Mer | 540.75 mi (870.25 km) |
| Mealhada to Oloron-Sainte-Marie | 448.06 mi (721.08 km) |
| Mealhada to Onet Village | 626.55 mi (1,008.34 km) |
| Mealhada to Onnaing | 903.02 mi (1,453.27 km) |
| Mealhada to Orange | 724.95 mi (1,166.69 km) |
| Mealhada to Orchies | 896.50 mi (1,442.78 km) |
| Mealhada to Orleans | 729.32 mi (1,173.73 km) |
| Mealhada to Orly | 784.98 mi (1,263.30 km) |
| Mealhada to Ormesson-sur-Marne | 791.79 mi (1,274.27 km) |
| Mealhada to Orsay | 776.02 mi (1,248.88 km) |
