| Alcoa to Orbetello | 4,842.13 mi (7,792.65 km) |
| Alcoa to Oria | 5,194.05 mi (8,359.01 km) |
| Alcoa to Oristano | 4,813.53 mi (7,746.63 km) |
| Alcoa to Orta Nova | 5,078.78 mi (8,173.50 km) |
| Alcoa to Orte | 4,892.61 mi (7,873.90 km) |
| Alcoa to Ortona | 4,983.80 mi (8,020.65 km) |
| Alcoa to Orvieto | 4,871.36 mi (7,839.70 km) |
| Alcoa to Orzinuovi | 4,684.85 mi (7,539.53 km) |
| Alcoa to Osimo | 4,902.88 mi (7,890.42 km) |
| Alcoa to Ospitaletto | 4,685.55 mi (7,540.67 km) |
| Alcoa to Ostuni | 5,182.71 mi (8,340.77 km) |
| Alcoa to Ottaviano | 5,043.25 mi (8,116.33 km) |
| Alcoa to Ovada | 4,655.17 mi (7,491.78 km) |
| Alcoa to Ozieri | 4,808.67 mi (7,738.81 km) |
| Alcoa to Paceco | 5,064.27 mi (8,150.15 km) |
