| Hartlepool to Opole | 845.54 mi (1,360.77 km) |
| Hartlepool to Orzesze | 893.90 mi (1,438.59 km) |
| Hartlepool to Osowa | 786.14 mi (1,265.17 km) |
| Hartlepool to Ostroda | 855.45 mi (1,376.71 km) |
| Hartlepool to Ostroleka | 930.29 mi (1,497.15 km) |
| Hartlepool to Ostrow Mazowiecka | 948.85 mi (1,527.03 km) |
| Hartlepool to Ostrow Wielkopolski | 812.74 mi (1,307.98 km) |
| Hartlepool to Ostrowiec Swietokrzyski | 974.50 mi (1,568.30 km) |
| Hartlepool to Ostrzeszow | 823.63 mi (1,325.50 km) |
| Hartlepool to Oswiecim | 915.96 mi (1,474.10 km) |
| Hartlepool to Otwock | 938.51 mi (1,510.38 km) |
| Hartlepool to Ozarow Mazowiecki | 917.56 mi (1,476.67 km) |
| Hartlepool to Ozimek | 856.31 mi (1,378.10 km) |
| Hartlepool to Ozorkow | 862.99 mi (1,388.84 km) |
| Hartlepool to Pabianice | 874.92 mi (1,408.05 km) |
