| Port Huron to Oststeinbek | 4,013.57 mi (6,459.22 km) |
| Port Huron to Ottendorf-Okrilla | 4,231.34 mi (6,809.68 km) |
| Port Huron to Ottersberg | 3,992.91 mi (6,425.97 km) |
| Port Huron to Ottobrunn | 4,271.61 mi (6,874.50 km) |
| Port Huron to Ottweiler | 4,050.44 mi (6,518.55 km) |
| Port Huron to Overath | 3,999.74 mi (6,436.96 km) |
| Port Huron to Oyten | 3,989.52 mi (6,420.51 km) |
| Port Huron to Paderborn | 4,026.92 mi (6,480.70 km) |
| Port Huron to Papenburg | 3,930.95 mi (6,326.25 km) |
| Port Huron to Parchim | 4,076.79 mi (6,560.96 km) |
| Port Huron to Pasewalk | 4,149.04 mi (6,677.24 km) |
| Port Huron to Passau | 4,319.81 mi (6,952.07 km) |
| Port Huron to Pattensen | 4,044.46 mi (6,508.92 km) |
| Port Huron to Pegnitz | 4,202.22 mi (6,762.82 km) |
| Port Huron to Peine | 4,059.43 mi (6,533.02 km) |
