| Westbrook to Opole | 3,922.29 mi (6,312.31 km) |
| Westbrook to Orzesze | 3,971.41 mi (6,391.37 km) |
| Westbrook to Osowa | 3,814.85 mi (6,139.40 km) |
| Westbrook to Ostroda | 3,892.26 mi (6,263.98 km) |
| Westbrook to Ostroleka | 3,971.27 mi (6,391.14 km) |
| Westbrook to Ostrow Mazowiecka | 3,992.68 mi (6,425.60 km) |
| Westbrook to Ostrow Wielkopolski | 3,884.03 mi (6,250.75 km) |
| Westbrook to Ostrowiec Swietokrzyski | 4,042.33 mi (6,505.50 km) |
| Westbrook to Ostrzeszow | 3,896.36 mi (6,270.59 km) |
| Westbrook to Oswiecim | 3,993.30 mi (6,426.59 km) |
| Westbrook to Otwock | 3,994.48 mi (6,428.50 km) |
| Westbrook to Ozarow Mazowiecki | 3,973.98 mi (6,395.51 km) |
| Westbrook to Ozimek | 3,932.64 mi (6,328.97 km) |
| Westbrook to Ozorkow | 3,927.40 mi (6,320.54 km) |
| Westbrook to Pabianice | 3,942.15 mi (6,344.28 km) |
