| Allen to Orbetello | 5,506.96 mi (8,862.59 km) |
| Allen to Oria | 5,851.42 mi (9,416.94 km) |
| Allen to Oristano | 5,496.89 mi (8,846.40 km) |
| Allen to Orta Nova | 5,737.42 mi (9,233.49 km) |
| Allen to Orte | 5,554.36 mi (8,938.88 km) |
| Allen to Ortona | 5,640.81 mi (9,078.01 km) |
| Allen to Orvieto | 5,532.48 mi (8,903.67 km) |
| Allen to Orzinuovi | 5,336.89 mi (8,588.90 km) |
| Allen to Osimo | 5,556.36 mi (8,942.10 km) |
| Allen to Ospitaletto | 5,336.37 mi (8,588.06 km) |
| Allen to Ostuni | 5,839.06 mi (9,397.06 km) |
| Allen to Ottaviano | 5,707.66 mi (9,185.60 km) |
| Allen to Ovada | 5,314.57 mi (8,552.98 km) |
| Allen to Ozieri | 5,487.94 mi (8,831.98 km) |
| Allen to Paceco | 5,747.03 mi (9,248.95 km) |
