| Allen Park to Oerlinghausen | 4,077.84 mi (6,562.65 km) |
| Allen Park to Oestrich-Winkel | 4,122.22 mi (6,634.08 km) |
| Allen Park to Offenburg | 4,174.75 mi (6,718.62 km) |
| Allen Park to Oftersheim | 4,167.15 mi (6,706.38 km) |
| Allen Park to Ohrdruf | 4,194.79 mi (6,750.86 km) |
| Allen Park to Ohringen | 4,208.39 mi (6,772.76 km) |
| Allen Park to Olbernhau | 4,296.25 mi (6,914.14 km) |
| Allen Park to Olching | 4,315.49 mi (6,945.11 km) |
| Allen Park to Oldenburg | 4,020.78 mi (6,470.82 km) |
| Allen Park to Oldenburg in Holstein | 4,075.37 mi (6,558.67 km) |
| Allen Park to Olfen | 4,039.06 mi (6,500.25 km) |
| Allen Park to Olpe | 4,080.09 mi (6,566.26 km) |
| Allen Park to Olsberg | 4,092.67 mi (6,586.52 km) |
| Allen Park to Oranienburg | 4,213.68 mi (6,781.26 km) |
| Allen Park to Ortenberg | 4,149.43 mi (6,677.87 km) |
