| Helston to Opole | 1,018.83 mi (1,639.66 km) |
| Helston to Orzesze | 1,059.40 mi (1,704.93 km) |
| Helston to Osowa | 1,041.80 mi (1,676.62 km) |
| Helston to Ostroda | 1,098.00 mi (1,767.06 km) |
| Helston to Ostroleka | 1,163.13 mi (1,871.87 km) |
| Helston to Ostrow Mazowiecka | 1,177.41 mi (1,894.85 km) |
| Helston to Ostrow Wielkopolski | 1,007.96 mi (1,622.15 km) |
| Helston to Ostrowiec Swietokrzyski | 1,166.72 mi (1,877.65 km) |
| Helston to Ostrzeszow | 1,013.96 mi (1,631.80 km) |
| Helston to Oswiecim | 1,081.27 mi (1,740.14 km) |
| Helston to Otwock | 1,153.01 mi (1,855.59 km) |
| Helston to Ozarow Mazowiecki | 1,132.87 mi (1,823.17 km) |
| Helston to Ozimek | 1,030.95 mi (1,659.15 km) |
| Helston to Ozorkow | 1,069.43 mi (1,721.09 km) |
| Helston to Pabianice | 1,075.00 mi (1,730.05 km) |
