| North Hykeham to Octeville | 249.89 mi (402.16 km) |
| North Hykeham to Oignies | 241.91 mi (389.32 km) |
| North Hykeham to Oissel | 275.14 mi (442.80 km) |
| North Hykeham to Olivet | 383.38 mi (616.99 km) |
| North Hykeham to Ollioules | 753.93 mi (1,213.33 km) |
| North Hykeham to Olonne-sur-Mer | 462.28 mi (743.97 km) |
| North Hykeham to Oloron-Sainte-Marie | 690.18 mi (1,110.74 km) |
| North Hykeham to Onet Village | 626.06 mi (1,007.55 km) |
| North Hykeham to Onnaing | 263.18 mi (423.55 km) |
| North Hykeham to Orange | 671.26 mi (1,080.29 km) |
| North Hykeham to Orchies | 248.51 mi (399.94 km) |
| North Hykeham to Orleans | 380.92 mi (613.03 km) |
| North Hykeham to Orly | 332.95 mi (535.83 km) |
| North Hykeham to Ormesson-sur-Marne | 332.79 mi (535.57 km) |
| North Hykeham to Orsay | 332.55 mi (535.19 km) |
