| Detroit to Opwijk | 3,933.56 mi (6,330.45 km) |
| Detroit to Ostend | 3,876.71 mi (6,238.95 km) |
| Detroit to Oud-Heverlee | 3,956.47 mi (6,367.32 km) |
| Detroit to Oud-Turnhout | 3,952.53 mi (6,360.99 km) |
| Detroit to Oudenaarde | 3,914.96 mi (6,300.52 km) |
| Detroit to Oudenburg | 3,881.16 mi (6,246.12 km) |
| Detroit to Oupeye | 3,997.97 mi (6,434.12 km) |
| Detroit to Overijse | 3,953.01 mi (6,361.76 km) |
| Detroit to Overpelt | 3,972.29 mi (6,392.78 km) |
| Detroit to Paal | 3,968.94 mi (6,387.40 km) |
| Detroit to Peer | 3,976.49 mi (6,399.54 km) |
| Detroit to Pepinster | 4,009.40 mi (6,452.51 km) |
| Detroit to Peruwelz | 3,925.17 mi (6,316.95 km) |
| Detroit to Perwez | 3,969.11 mi (6,387.66 km) |
| Detroit to Philippeville | 3,973.06 mi (6,394.02 km) |
