| East Islip to Orbetello | 4,169.08 mi (6,709.49 km) |
| East Islip to Oria | 4,522.21 mi (7,277.79 km) |
| East Islip to Oristano | 4,137.87 mi (6,659.26 km) |
| East Islip to Orta Nova | 4,406.79 mi (7,092.04 km) |
| East Islip to Orte | 4,220.15 mi (6,791.67 km) |
| East Islip to Ortona | 4,312.29 mi (6,939.96 km) |
| East Islip to Orvieto | 4,199.06 mi (6,757.73 km) |
| East Islip to Orzinuovi | 4,014.99 mi (6,461.51 km) |
| East Islip to Osimo | 4,232.32 mi (6,811.27 km) |
| East Islip to Ospitaletto | 4,016.03 mi (6,463.18 km) |
| East Islip to Ostuni | 4,511.12 mi (7,259.94 km) |
| East Islip to Ottaviano | 4,370.10 mi (7,033.00 km) |
| East Islip to Ovada | 3,983.51 mi (6,410.84 km) |
| East Islip to Ozieri | 4,133.40 mi (6,652.06 km) |
| East Islip to Paceco | 4,388.59 mi (7,062.75 km) |
