| Harper Woods to Opole | 4,442.12 mi (7,148.91 km) |
| Harper Woods to Orzesze | 4,492.30 mi (7,229.66 km) |
| Harper Woods to Osowa | 4,308.22 mi (6,933.42 km) |
| Harper Woods to Ostroda | 4,386.82 mi (7,059.90 km) |
| Harper Woods to Ostroleka | 4,465.80 mi (7,187.01 km) |
| Harper Woods to Ostrow Mazowiecka | 4,488.07 mi (7,222.85 km) |
| Harper Woods to Ostrow Wielkopolski | 4,397.92 mi (7,077.76 km) |
| Harper Woods to Ostrowiec Swietokrzyski | 4,551.14 mi (7,324.35 km) |
| Harper Woods to Ostrzeszow | 4,411.44 mi (7,099.53 km) |
| Harper Woods to Oswiecim | 4,513.61 mi (7,263.95 km) |
| Harper Woods to Otwock | 4,496.11 mi (7,235.79 km) |
| Harper Woods to Ozarow Mazowiecki | 4,476.24 mi (7,203.81 km) |
| Harper Woods to Ozimek | 4,451.70 mi (7,164.33 km) |
| Harper Woods to Ozorkow | 4,435.37 mi (7,138.04 km) |
| Harper Woods to Pabianice | 4,451.91 mi (7,164.66 km) |
