| West Haven to Opole | 4,133.05 mi (6,651.51 km) |
| West Haven to Orzesze | 4,182.05 mi (6,730.35 km) |
| West Haven to Osowa | 4,027.64 mi (6,481.85 km) |
| West Haven to Ostroda | 4,104.96 mi (6,606.29 km) |
| West Haven to Ostroleka | 4,183.93 mi (6,733.39 km) |
| West Haven to Ostrow Mazowiecka | 4,205.29 mi (6,767.77 km) |
| West Haven to Ostrow Wielkopolski | 4,095.38 mi (6,590.87 km) |
| West Haven to Ostrowiec Swietokrzyski | 4,254.01 mi (6,846.16 km) |
| West Haven to Ostrzeszow | 4,107.59 mi (6,610.53 km) |
| West Haven to Oswiecim | 4,203.97 mi (6,765.64 km) |
| West Haven to Otwock | 4,206.71 mi (6,770.04 km) |
| West Haven to Ozarow Mazowiecki | 4,186.18 mi (6,737.00 km) |
| West Haven to Ozimek | 4,143.48 mi (6,668.28 km) |
| West Haven to Ozorkow | 4,139.20 mi (6,661.40 km) |
| West Haven to Pabianice | 4,153.81 mi (6,684.91 km) |
