| Merzig to Octeville | 370.36 mi (596.04 km) |
| Merzig to Oignies | 175.74 mi (282.83 km) |
| Merzig to Oissel | 248.52 mi (399.95 km) |
| Merzig to Olivet | 241.48 mi (388.62 km) |
| Merzig to Ollioules | 437.56 mi (704.18 km) |
| Merzig to Olonne-sur-Mer | 436.71 mi (702.82 km) |
| Merzig to Oloron-Sainte-Marie | 552.30 mi (888.84 km) |
| Merzig to Onet Village | 399.20 mi (642.45 km) |
| Merzig to Onnaing | 149.09 mi (239.94 km) |
| Merzig to Orange | 376.79 mi (606.39 km) |
| Merzig to Orchies | 165.76 mi (266.76 km) |
| Merzig to Orleans | 239.86 mi (386.02 km) |
| Merzig to Orly | 197.19 mi (317.35 km) |
| Merzig to Ormesson-sur-Marne | 190.03 mi (305.82 km) |
| Merzig to Orsay | 207.06 mi (333.23 km) |
