| Alton to Opole | 822.28 mi (1,323.33 km) |
| Alton to Orzesze | 864.36 mi (1,391.05 km) |
| Alton to Osowa | 840.53 mi (1,352.70 km) |
| Alton to Ostroda | 896.37 mi (1,442.57 km) |
| Alton to Ostroleka | 961.68 mi (1,547.67 km) |
| Alton to Ostrow Mazowiecka | 976.14 mi (1,570.94 km) |
| Alton to Ostrow Wielkopolski | 808.61 mi (1,301.33 km) |
| Alton to Ostrowiec Swietokrzyski | 968.48 mi (1,558.61 km) |
| Alton to Ostrzeszow | 815.16 mi (1,311.87 km) |
| Alton to Oswiecim | 886.43 mi (1,426.57 km) |
| Alton to Otwock | 952.51 mi (1,532.92 km) |
| Alton to Ozarow Mazowiecki | 932.26 mi (1,500.32 km) |
| Alton to Ozimek | 834.28 mi (1,342.65 km) |
| Alton to Ozorkow | 869.31 mi (1,399.02 km) |
| Alton to Pabianice | 875.48 mi (1,408.95 km) |
