| Eiras to Orbetello | 1,027.52 mi (1,653.64 km) |
| Eiras to Oria | 1,366.75 mi (2,199.57 km) |
| Eiras to Oristano | 898.55 mi (1,446.08 km) |
| Eiras to Orta Nova | 1,260.78 mi (2,029.03 km) |
| Eiras to Orte | 1,087.37 mi (1,749.96 km) |
| Eiras to Ortona | 1,190.09 mi (1,915.26 km) |
| Eiras to Orvieto | 1,073.86 mi (1,728.21 km) |
| Eiras to Orzinuovi | 993.47 mi (1,598.83 km) |
| Eiras to Osimo | 1,145.79 mi (1,843.97 km) |
| Eiras to Ospitaletto | 1,002.75 mi (1,613.77 km) |
| Eiras to Ostuni | 1,362.06 mi (2,192.02 km) |
| Eiras to Ottaviano | 1,199.70 mi (1,930.73 km) |
| Eiras to Ovada | 919.81 mi (1,480.28 km) |
| Eiras to Ozieri | 915.60 mi (1,473.52 km) |
| Eiras to Paceco | 1,132.49 mi (1,822.56 km) |
