| Eastham to Orbetello | 994.32 mi (1,600.21 km) |
| Eastham to Oria | 1,306.12 mi (2,102.00 km) |
| Eastham to Oristano | 1,073.46 mi (1,727.57 km) |
| Eastham to Orta Nova | 1,197.51 mi (1,927.20 km) |
| Eastham to Orte | 1,029.20 mi (1,656.34 km) |
| Eastham to Ortona | 1,100.15 mi (1,770.51 km) |
| Eastham to Orvieto | 1,006.51 mi (1,619.83 km) |
| Eastham to Orzinuovi | 795.10 mi (1,279.58 km) |
| Eastham to Osimo | 1,010.70 mi (1,626.56 km) |
| Eastham to Ospitaletto | 791.73 mi (1,274.17 km) |
| Eastham to Ostuni | 1,292.18 mi (2,079.57 km) |
| Eastham to Ottaviano | 1,183.25 mi (1,904.26 km) |
| Eastham to Ovada | 795.70 mi (1,280.56 km) |
| Eastham to Ozieri | 1,041.85 mi (1,676.69 km) |
| Eastham to Paceco | 1,291.33 mi (2,078.20 km) |
