| Walton upon Thames to Octeville | 133.06 mi (214.14 km) |
| Walton upon Thames to Oignies | 161.33 mi (259.63 km) |
| Walton upon Thames to Oissel | 156.07 mi (251.17 km) |
| Walton upon Thames to Olivet | 264.49 mi (425.66 km) |
| Walton upon Thames to Ollioules | 640.44 mi (1,030.69 km) |
| Walton upon Thames to Olonne-sur-Mer | 340.76 mi (548.40 km) |
| Walton upon Thames to Oloron-Sainte-Marie | 566.13 mi (911.09 km) |
| Walton upon Thames to Onet Village | 504.62 mi (812.11 km) |
| Walton upon Thames to Onnaing | 187.95 mi (302.47 km) |
| Walton upon Thames to Orange | 556.13 mi (895.01 km) |
| Walton upon Thames to Orchies | 171.26 mi (275.62 km) |
| Walton upon Thames to Orleans | 262.17 mi (421.92 km) |
| Walton upon Thames to Orly | 220.95 mi (355.58 km) |
| Walton upon Thames to Ormesson-sur-Marne | 222.26 mi (357.70 km) |
| Walton upon Thames to Orsay | 218.67 mi (351.91 km) |
