| Halikko to Oignies | 1,036.72 mi (1,668.43 km) |
| Halikko to Oissel | 1,150.93 mi (1,852.24 km) |
| Halikko to Olivet | 1,208.18 mi (1,944.38 km) |
| Halikko to Ollioules | 1,392.14 mi (2,240.43 km) |
| Halikko to Olonne-sur-Mer | 1,385.07 mi (2,229.06 km) |
| Halikko to Oloron-Sainte-Marie | 1,543.70 mi (2,484.35 km) |
| Halikko to Onet Village | 1,392.39 mi (2,240.84 km) |
| Halikko to Onnaing | 1,023.70 mi (1,647.49 km) |
| Halikko to Orange | 1,353.27 mi (2,177.87 km) |
| Halikko to Orchies | 1,029.23 mi (1,656.38 km) |
| Halikko to Orleans | 1,205.81 mi (1,940.56 km) |
| Halikko to Orly | 1,146.03 mi (1,844.35 km) |
| Halikko to Ormesson-sur-Marne | 1,139.69 mi (1,834.15 km) |
| Halikko to Orsay | 1,154.26 mi (1,857.60 km) |
| Halikko to Orthez | 1,530.77 mi (2,463.53 km) |
