| Copenhagen to Oignies | 535.24 mi (861.38 km) |
| Copenhagen to Oissel | 650.03 mi (1,046.12 km) |
| Copenhagen to Olivet | 705.08 mi (1,134.72 km) |
| Copenhagen to Ollioules | 916.35 mi (1,474.72 km) |
| Copenhagen to Olonne-sur-Mer | 883.20 mi (1,421.38 km) |
| Copenhagen to Oloron-Sainte-Marie | 1,042.22 mi (1,677.30 km) |
| Copenhagen to Onet Village | 896.18 mi (1,442.26 km) |
| Copenhagen to Onnaing | 521.17 mi (838.75 km) |
| Copenhagen to Orange | 867.45 mi (1,396.03 km) |
| Copenhagen to Orchies | 527.34 mi (848.67 km) |
| Copenhagen to Orleans | 702.70 mi (1,130.88 km) |
| Copenhagen to Orly | 642.92 mi (1,034.68 km) |
| Copenhagen to Ormesson-sur-Marne | 636.57 mi (1,024.45 km) |
| Copenhagen to Orsay | 651.20 mi (1,048.00 km) |
| Copenhagen to Orthez | 1,028.76 mi (1,655.63 km) |
