| Port Huron to Opole | 4,397.82 mi (7,077.60 km) |
| Port Huron to Orzesze | 4,448.01 mi (7,158.38 km) |
| Port Huron to Osowa | 4,263.49 mi (6,861.43 km) |
| Port Huron to Ostroda | 4,342.10 mi (6,987.93 km) |
| Port Huron to Ostroleka | 4,421.07 mi (7,115.02 km) |
| Port Huron to Ostrow Mazowiecka | 4,443.35 mi (7,150.88 km) |
| Port Huron to Ostrow Wielkopolski | 4,353.50 mi (7,006.27 km) |
| Port Huron to Ostrowiec Swietokrzyski | 4,506.61 mi (7,252.69 km) |
| Port Huron to Ostrzeszow | 4,367.05 mi (7,028.08 km) |
| Port Huron to Oswiecim | 4,469.31 mi (7,192.65 km) |
| Port Huron to Otwock | 4,451.47 mi (7,163.95 km) |
| Port Huron to Ozarow Mazowiecki | 4,431.62 mi (7,132.00 km) |
| Port Huron to Ozimek | 4,407.38 mi (7,092.99 km) |
| Port Huron to Ozorkow | 4,390.84 mi (7,066.38 km) |
| Port Huron to Pabianice | 4,407.41 mi (7,093.04 km) |
