| Darlington to Opole | 856.92 mi (1,379.08 km) |
| Darlington to Orzesze | 905.03 mi (1,456.51 km) |
| Darlington to Osowa | 801.15 mi (1,289.33 km) |
| Darlington to Ostroda | 870.01 mi (1,400.15 km) |
| Darlington to Ostroleka | 944.55 mi (1,520.10 km) |
| Darlington to Ostrow Mazowiecka | 962.95 mi (1,549.73 km) |
| Darlington to Ostrow Wielkopolski | 825.07 mi (1,327.82 km) |
| Darlington to Ostrowiec Swietokrzyski | 987.04 mi (1,588.48 km) |
| Darlington to Ostrzeszow | 835.76 mi (1,345.02 km) |
| Darlington to Oswiecim | 927.14 mi (1,492.09 km) |
| Darlington to Otwock | 951.98 mi (1,532.07 km) |
| Darlington to Ozarow Mazowiecki | 931.03 mi (1,498.35 km) |
| Darlington to Ozimek | 867.78 mi (1,396.55 km) |
| Darlington to Ozorkow | 875.96 mi (1,409.72 km) |
| Darlington to Pabianice | 887.62 mi (1,428.49 km) |
