| Biddeford to Opole | 3,936.27 mi (6,334.82 km) |
| Biddeford to Orzesze | 3,985.37 mi (6,413.83 km) |
| Biddeford to Osowa | 3,829.43 mi (6,162.87 km) |
| Biddeford to Ostroda | 3,906.81 mi (6,287.40 km) |
| Biddeford to Ostroleka | 3,985.80 mi (6,414.53 km) |
| Biddeford to Ostrow Mazowiecka | 4,007.20 mi (6,448.97 km) |
| Biddeford to Ostrow Wielkopolski | 3,898.17 mi (6,273.49 km) |
| Biddeford to Ostrowiec Swietokrzyski | 4,056.56 mi (6,528.40 km) |
| Biddeford to Ostrzeszow | 3,910.47 mi (6,293.29 km) |
| Biddeford to Oswiecim | 4,007.26 mi (6,449.06 km) |
| Biddeford to Otwock | 4,008.87 mi (6,451.65 km) |
| Biddeford to Ozarow Mazowiecki | 3,988.36 mi (6,418.65 km) |
| Biddeford to Ozimek | 3,946.65 mi (6,351.51 km) |
| Biddeford to Ozorkow | 3,941.66 mi (6,343.49 km) |
| Biddeford to Pabianice | 3,956.37 mi (6,367.17 km) |
