| Merksem to Oignies | 82.73 mi (133.14 km) |
| Merksem to Oissel | 197.74 mi (318.24 km) |
| Merksem to Olivet | 259.72 mi (417.97 km) |
| Merksem to Ollioules | 563.74 mi (907.25 km) |
| Merksem to Olonne-sur-Mer | 430.34 mi (692.56 km) |
| Merksem to Oloron-Sainte-Marie | 604.10 mi (972.21 km) |
| Merksem to Onet Village | 482.80 mi (776.99 km) |
| Merksem to Onnaing | 69.61 mi (112.02 km) |
| Merksem to Orange | 491.17 mi (790.46 km) |
| Merksem to Orchies | 74.45 mi (119.81 km) |
| Merksem to Orleans | 257.14 mi (413.82 km) |
| Merksem to Orly | 195.15 mi (314.06 km) |
| Merksem to Ormesson-sur-Marne | 189.61 mi (305.15 km) |
| Merksem to Orsay | 202.33 mi (325.61 km) |
| Merksem to Orthez | 588.34 mi (946.84 km) |
