| Horley to Opole | 787.38 mi (1,267.17 km) |
| Horley to Orzesze | 829.44 mi (1,334.86 km) |
| Horley to Osowa | 807.83 mi (1,300.08 km) |
| Horley to Ostroda | 862.94 mi (1,388.76 km) |
| Horley to Ostroleka | 927.79 mi (1,493.13 km) |
| Horley to Ostrow Mazowiecka | 942.09 mi (1,516.15 km) |
| Horley to Ostrow Wielkopolski | 773.94 mi (1,245.54 km) |
| Horley to Ostrowiec Swietokrzyski | 933.69 mi (1,502.62 km) |
| Horley to Ostrzeszow | 780.42 mi (1,255.96 km) |
| Horley to Oswiecim | 851.52 mi (1,370.38 km) |
| Horley to Otwock | 918.11 mi (1,477.56 km) |
| Horley to Ozarow Mazowiecki | 897.89 mi (1,445.01 km) |
| Horley to Ozimek | 799.39 mi (1,286.50 km) |
| Horley to Ozorkow | 834.80 mi (1,343.48 km) |
| Horley to Pabianice | 840.85 mi (1,353.22 km) |
