| Harborne to Opole | 860.15 mi (1,384.28 km) |
| Harborne to Orzesze | 905.01 mi (1,456.47 km) |
| Harborne to Osowa | 848.19 mi (1,365.03 km) |
| Harborne to Ostroda | 910.01 mi (1,464.52 km) |
| Harborne to Ostroleka | 979.68 mi (1,576.65 km) |
| Harborne to Ostrow Mazowiecka | 995.88 mi (1,602.71 km) |
| Harborne to Ostrow Wielkopolski | 839.03 mi (1,350.28 km) |
| Harborne to Ostrowiec Swietokrzyski | 1,001.10 mi (1,611.11 km) |
| Harborne to Ostrzeszow | 847.32 mi (1,363.63 km) |
| Harborne to Oswiecim | 927.28 mi (1,492.31 km) |
| Harborne to Otwock | 977.28 mi (1,572.78 km) |
| Harborne to Ozarow Mazowiecki | 956.58 mi (1,539.47 km) |
| Harborne to Ozimek | 871.81 mi (1,403.05 km) |
| Harborne to Ozorkow | 896.32 mi (1,442.49 km) |
| Harborne to Pabianice | 904.78 mi (1,456.10 km) |
