| Thornton to Octeville | 287.77 mi (463.11 km) |
| Thornton to Oignies | 307.84 mi (495.42 km) |
| Thornton to Oissel | 332.21 mi (534.63 km) |
| Thornton to Olivet | 440.80 mi (709.40 km) |
| Thornton to Ollioules | 814.88 mi (1,311.43 km) |
| Thornton to Olonne-sur-Mer | 501.19 mi (806.59 km) |
| Thornton to Oloron-Sainte-Marie | 734.27 mi (1,181.69 km) |
| Thornton to Onet Village | 681.16 mi (1,096.22 km) |
| Thornton to Onnaing | 329.60 mi (530.44 km) |
| Thornton to Orange | 731.33 mi (1,176.95 km) |
| Thornton to Orchies | 314.73 mi (506.51 km) |
| Thornton to Orleans | 438.44 mi (705.59 km) |
| Thornton to Orly | 393.78 mi (633.73 km) |
| Thornton to Ormesson-sur-Marne | 394.16 mi (634.34 km) |
| Thornton to Orsay | 392.61 mi (631.85 km) |
