| Hartlepool to Octeville | 350.31 mi (563.76 km) |
| Hartlepool to Oignies | 340.74 mi (548.36 km) |
| Hartlepool to Oissel | 382.20 mi (615.09 km) |
| Hartlepool to Olivet | 490.30 mi (789.06 km) |
| Hartlepool to Ollioules | 858.95 mi (1,382.34 km) |
| Hartlepool to Olonne-sur-Mer | 563.92 mi (907.53 km) |
| Hartlepool to Oloron-Sainte-Marie | 794.75 mi (1,279.02 km) |
| Hartlepool to Onet Village | 733.18 mi (1,179.94 km) |
| Hartlepool to Onnaing | 359.24 mi (578.14 km) |
| Hartlepool to Orange | 776.94 mi (1,250.37 km) |
| Hartlepool to Orchies | 345.96 mi (556.76 km) |
| Hartlepool to Orleans | 487.82 mi (785.07 km) |
| Hartlepool to Orly | 438.68 mi (705.99 km) |
| Hartlepool to Ormesson-sur-Marne | 438.18 mi (705.18 km) |
| Hartlepool to Orsay | 438.69 mi (706.01 km) |
