| Allen Park to Orbetello | 4,538.72 mi (7,304.36 km) |
| Allen Park to Oria | 4,883.41 mi (7,859.10 km) |
| Allen Park to Oristano | 4,530.52 mi (7,291.17 km) |
| Allen Park to Orta Nova | 4,769.32 mi (7,675.48 km) |
| Allen Park to Orte | 4,586.14 mi (7,380.67 km) |
| Allen Park to Ortona | 4,672.78 mi (7,520.11 km) |
| Allen Park to Orvieto | 4,564.27 mi (7,345.48 km) |
| Allen Park to Orzinuovi | 4,369.13 mi (7,031.44 km) |
| Allen Park to Osimo | 4,588.56 mi (7,384.57 km) |
| Allen Park to Ospitaletto | 4,368.72 mi (7,030.78 km) |
| Allen Park to Ostuni | 4,871.12 mi (7,839.31 km) |
| Allen Park to Ottaviano | 4,739.42 mi (7,627.36 km) |
| Allen Park to Ovada | 4,346.38 mi (6,994.83 km) |
| Allen Park to Ozieri | 4,520.84 mi (7,275.58 km) |
| Allen Park to Paceco | 4,780.36 mi (7,693.24 km) |
