| Reading to Opole | 820.52 mi (1,320.50 km) |
| Reading to Orzesze | 863.30 mi (1,389.35 km) |
| Reading to Osowa | 832.31 mi (1,339.47 km) |
| Reading to Ostroda | 889.41 mi (1,431.36 km) |
| Reading to Ostroleka | 955.68 mi (1,538.01 km) |
| Reading to Ostrow Mazowiecka | 970.51 mi (1,561.89 km) |
| Reading to Ostrow Wielkopolski | 805.13 mi (1,295.73 km) |
| Reading to Ostrowiec Swietokrzyski | 965.65 mi (1,554.07 km) |
| Reading to Ostrzeszow | 812.08 mi (1,306.92 km) |
| Reading to Oswiecim | 885.44 mi (1,424.97 km) |
| Reading to Otwock | 947.94 mi (1,525.56 km) |
| Reading to Ozarow Mazowiecki | 927.57 mi (1,492.78 km) |
| Reading to Ozimek | 832.46 mi (1,339.71 km) |
| Reading to Ozorkow | 865.15 mi (1,392.32 km) |
| Reading to Pabianice | 871.83 mi (1,403.07 km) |
