| Middle Valley to Opole | 4,895.21 mi (7,878.08 km) |
| Middle Valley to Orzesze | 4,944.80 mi (7,957.89 km) |
| Middle Valley to Osowa | 4,775.86 mi (7,686.00 km) |
| Middle Valley to Ostroda | 4,854.00 mi (7,811.76 km) |
| Middle Valley to Ostroleka | 4,933.13 mi (7,939.11 km) |
| Middle Valley to Ostrow Mazowiecka | 4,955.01 mi (7,974.31 km) |
| Middle Valley to Ostrow Wielkopolski | 4,854.55 mi (7,812.64 km) |
| Middle Valley to Ostrowiec Swietokrzyski | 5,010.94 mi (8,064.34 km) |
| Middle Valley to Ostrzeszow | 4,867.38 mi (7,833.30 km) |
| Middle Valley to Oswiecim | 4,966.50 mi (7,992.81 km) |
| Middle Valley to Otwock | 4,959.79 mi (7,982.02 km) |
| Middle Valley to Ozarow Mazowiecki | 4,939.56 mi (7,949.45 km) |
| Middle Valley to Ozimek | 4,905.29 mi (7,894.30 km) |
| Middle Valley to Ozorkow | 4,895.47 mi (7,878.50 km) |
| Middle Valley to Pabianice | 4,911.02 mi (7,903.53 km) |
