| Caister-on-Sea to Octeville | 255.04 mi (410.45 km) |
| Caister-on-Sea to Oignies | 160.17 mi (257.77 km) |
| Caister-on-Sea to Oissel | 230.33 mi (370.68 km) |
| Caister-on-Sea to Olivet | 330.84 mi (532.43 km) |
| Caister-on-Sea to Ollioules | 683.97 mi (1,100.75 km) |
| Caister-on-Sea to Olonne-sur-Mer | 450.59 mi (725.16 km) |
| Caister-on-Sea to Oloron-Sainte-Marie | 662.23 mi (1,065.75 km) |
| Caister-on-Sea to Onet Village | 573.81 mi (923.45 km) |
| Caister-on-Sea to Onnaing | 175.72 mi (282.79 km) |
| Caister-on-Sea to Orange | 604.72 mi (973.21 km) |
| Caister-on-Sea to Orchies | 163.77 mi (263.56 km) |
| Caister-on-Sea to Orleans | 328.18 mi (528.16 km) |
| Caister-on-Sea to Orly | 271.49 mi (436.92 km) |
| Caister-on-Sea to Ormesson-sur-Marne | 269.37 mi (433.51 km) |
| Caister-on-Sea to Orsay | 273.84 mi (440.71 km) |
