| Castleton to Opole | 873.25 mi (1,405.37 km) |
| Castleton to Orzesze | 920.01 mi (1,480.61 km) |
| Castleton to Osowa | 837.20 mi (1,347.35 km) |
| Castleton to Ostroda | 903.17 mi (1,453.51 km) |
| Castleton to Ostroleka | 975.75 mi (1,570.31 km) |
| Castleton to Ostrow Mazowiecka | 993.21 mi (1,598.42 km) |
| Castleton to Ostrow Wielkopolski | 846.27 mi (1,361.94 km) |
| Castleton to Ostrowiec Swietokrzyski | 1,008.79 mi (1,623.50 km) |
| Castleton to Ostrzeszow | 855.89 mi (1,377.42 km) |
| Castleton to Oswiecim | 942.26 mi (1,516.42 km) |
| Castleton to Otwock | 978.77 mi (1,575.19 km) |
| Castleton to Ozarow Mazowiecki | 957.88 mi (1,541.56 km) |
| Castleton to Ozimek | 884.52 mi (1,423.51 km) |
| Castleton to Ozorkow | 900.28 mi (1,448.85 km) |
| Castleton to Pabianice | 910.51 mi (1,465.33 km) |
