| Gloucester City to Opole | 4,280.58 mi (6,888.93 km) |
| Gloucester City to Orzesze | 4,329.61 mi (6,967.83 km) |
| Gloucester City to Osowa | 4,174.22 mi (6,717.76 km) |
| Gloucester City to Ostroda | 4,251.62 mi (6,842.32 km) |
| Gloucester City to Ostroleka | 4,330.62 mi (6,969.46 km) |
| Gloucester City to Ostrow Mazowiecka | 4,352.03 mi (7,003.91 km) |
| Gloucester City to Ostrow Wielkopolski | 4,242.75 mi (6,828.04 km) |
| Gloucester City to Ostrowiec Swietokrzyski | 4,401.26 mi (7,083.14 km) |
| Gloucester City to Ostrzeszow | 4,255.00 mi (6,847.76 km) |
| Gloucester City to Oswiecim | 4,351.52 mi (7,003.10 km) |
| Gloucester City to Otwock | 4,353.69 mi (7,006.59 km) |
| Gloucester City to Ozarow Mazowiecki | 4,333.18 mi (6,973.58 km) |
| Gloucester City to Ozimek | 4,290.99 mi (6,905.68 km) |
| Gloucester City to Ozorkow | 4,286.40 mi (6,898.29 km) |
| Gloucester City to Pabianice | 4,301.07 mi (6,921.90 km) |
