| Hartlepool to Nuth | 394.32 mi (634.60 km) |
| Hartlepool to Oegstgeest | 290.70 mi (467.83 km) |
| Hartlepool to Oirschot | 348.37 mi (560.65 km) |
| Hartlepool to Oisterwijk | 341.34 mi (549.33 km) |
| Hartlepool to Oldebroek | 330.02 mi (531.12 km) |
| Hartlepool to Oldenzaal | 372.36 mi (599.26 km) |
| Hartlepool to Ommen | 346.62 mi (557.83 km) |
| Hartlepool to Oosterend | 318.48 mi (512.54 km) |
| Hartlepool to Oosterhout | 327.62 mi (527.26 km) |
| Hartlepool to Oosterwolde | 327.39 mi (526.88 km) |
| Hartlepool to Oostzaan | 294.54 mi (474.01 km) |
| Hartlepool to Opmeer | 286.93 mi (461.76 km) |
| Hartlepool to Oss | 343.57 mi (552.92 km) |
| Hartlepool to Oud-Beijerland | 305.11 mi (491.02 km) |
| Hartlepool to Oudenbosch | 319.78 mi (514.64 km) |
