| Kirkwall to Octeville | 648.45 mi (1,043.58 km) |
| Kirkwall to Oignies | 633.67 mi (1,019.80 km) |
| Kirkwall to Oissel | 685.55 mi (1,103.29 km) |
| Kirkwall to Olivet | 793.24 mi (1,276.59 km) |
| Kirkwall to Ollioules | 1,157.10 mi (1,862.18 km) |
| Kirkwall to Olonne-sur-Mer | 861.26 mi (1,386.06 km) |
| Kirkwall to Oloron-Sainte-Marie | 1,095.36 mi (1,762.82 km) |
| Kirkwall to Onet Village | 1,036.61 mi (1,668.26 km) |
| Kirkwall to Onnaing | 648.21 mi (1,043.20 km) |
| Kirkwall to Orange | 1,076.75 mi (1,732.86 km) |
| Kirkwall to Orchies | 637.08 mi (1,025.28 km) |
| Kirkwall to Orleans | 790.72 mi (1,272.54 km) |
| Kirkwall to Orly | 739.60 mi (1,190.26 km) |
| Kirkwall to Ormesson-sur-Marne | 738.54 mi (1,188.57 km) |
| Kirkwall to Orsay | 740.28 mi (1,191.37 km) |
