| Henley on Thames to Octeville | 135.82 mi (218.58 km) |
| Henley on Thames to Oignies | 184.72 mi (297.28 km) |
| Henley on Thames to Oissel | 175.14 mi (281.85 km) |
| Henley on Thames to Olivet | 282.90 mi (455.28 km) |
| Henley on Thames to Ollioules | 659.97 mi (1,062.12 km) |
| Henley on Thames to Olonne-sur-Mer | 347.67 mi (559.52 km) |
| Henley on Thames to Oloron-Sainte-Marie | 576.51 mi (927.80 km) |
| Henley on Thames to Onet Village | 521.00 mi (838.47 km) |
| Henley on Thames to Onnaing | 211.28 mi (340.02 km) |
| Henley on Thames to Orange | 575.28 mi (925.82 km) |
| Henley on Thames to Orchies | 194.61 mi (313.19 km) |
| Henley on Thames to Orleans | 280.65 mi (451.67 km) |
| Henley on Thames to Orly | 241.83 mi (389.19 km) |
| Henley on Thames to Ormesson-sur-Marne | 243.46 mi (391.82 km) |
| Henley on Thames to Orsay | 239.09 mi (384.78 km) |
