| West Islip to Oerlinghausen | 3,773.96 mi (6,073.60 km) |
| West Islip to Oestrich-Winkel | 3,801.35 mi (6,117.68 km) |
| West Islip to Offenburg | 3,842.23 mi (6,183.48 km) |
| West Islip to Oftersheim | 3,843.03 mi (6,184.75 km) |
| West Islip to Ohrdruf | 3,887.30 mi (6,256.00 km) |
| West Islip to Ohringen | 3,885.41 mi (6,252.96 km) |
| West Islip to Olbernhau | 3,994.52 mi (6,428.56 km) |
| West Islip to Olching | 3,990.16 mi (6,421.54 km) |
| West Islip to Oldenburg | 3,725.32 mi (5,995.32 km) |
| West Islip to Oldenburg in Holstein | 3,795.81 mi (6,108.76 km) |
| West Islip to Olfen | 3,730.06 mi (6,002.95 km) |
| West Islip to Olpe | 3,766.65 mi (6,061.84 km) |
| West Islip to Olsberg | 3,783.46 mi (6,088.90 km) |
| West Islip to Oranienburg | 3,927.65 mi (6,320.94 km) |
| West Islip to Ortenberg | 3,833.97 mi (6,170.18 km) |
