| Knokke-Heist to Oignies | 61.60 mi (99.14 km) |
| Knokke-Heist to Oissel | 168.68 mi (271.46 km) |
| Knokke-Heist to Olivet | 248.15 mi (399.36 km) |
| Knokke-Heist to Ollioules | 579.19 mi (932.12 km) |
| Knokke-Heist to Olonne-sur-Mer | 403.48 mi (649.33 km) |
| Knokke-Heist to Oloron-Sainte-Marie | 591.56 mi (952.02 km) |
| Knokke-Heist to Onet Village | 483.05 mi (777.39 km) |
| Knokke-Heist to Onnaing | 67.27 mi (108.26 km) |
| Knokke-Heist to Orange | 502.66 mi (808.95 km) |
| Knokke-Heist to Orchies | 59.91 mi (96.42 km) |
| Knokke-Heist to Orleans | 245.47 mi (395.04 km) |
| Knokke-Heist to Orly | 183.80 mi (295.80 km) |
| Knokke-Heist to Ormesson-sur-Marne | 179.67 mi (289.15 km) |
| Knokke-Heist to Orsay | 189.04 mi (304.23 km) |
| Knokke-Heist to Orthez | 574.59 mi (924.71 km) |
