| Heswall to Opole | 909.89 mi (1,464.33 km) |
| Heswall to Orzesze | 956.17 mi (1,538.81 km) |
| Heswall to Osowa | 878.37 mi (1,413.60 km) |
| Heswall to Ostroda | 943.83 mi (1,518.95 km) |
| Heswall to Ostroleka | 1,016.01 mi (1,635.12 km) |
| Heswall to Ostrow Mazowiecka | 1,033.28 mi (1,662.91 km) |
| Heswall to Ostrow Wielkopolski | 884.32 mi (1,423.17 km) |
| Heswall to Ostrowiec Swietokrzyski | 1,046.84 mi (1,684.73 km) |
| Heswall to Ostrzeszow | 893.64 mi (1,438.17 km) |
| Heswall to Oswiecim | 978.44 mi (1,574.65 km) |
| Heswall to Otwock | 1,018.10 mi (1,638.48 km) |
| Heswall to Ozarow Mazowiecki | 997.23 mi (1,604.89 km) |
| Heswall to Ozimek | 921.27 mi (1,482.65 km) |
| Heswall to Ozorkow | 939.07 mi (1,511.29 km) |
| Heswall to Pabianice | 948.94 mi (1,527.17 km) |
