| Seaham to Octeville | 360.42 mi (580.04 km) |
| Seaham to Oignies | 352.25 mi (566.90 km) |
| Seaham to Oissel | 393.59 mi (633.42 km) |
| Seaham to Olivet | 501.74 mi (807.47 km) |
| Seaham to Ollioules | 870.53 mi (1,400.98 km) |
| Seaham to Olonne-sur-Mer | 574.05 mi (923.85 km) |
| Seaham to Oloron-Sainte-Marie | 805.32 mi (1,296.04 km) |
| Seaham to Onet Village | 744.53 mi (1,198.21 km) |
| Seaham to Onnaing | 370.67 mi (596.54 km) |
| Seaham to Orange | 788.51 mi (1,268.98 km) |
| Seaham to Orchies | 357.44 mi (575.24 km) |
| Seaham to Orleans | 499.26 mi (803.48 km) |
| Seaham to Orly | 450.23 mi (724.58 km) |
| Seaham to Ormesson-sur-Marne | 449.74 mi (723.79 km) |
| Seaham to Orsay | 450.22 mi (724.57 km) |
