| Helena to Opole | 5,085.55 mi (8,184.40 km) |
| Helena to Orzesze | 5,135.08 mi (8,264.11 km) |
| Helena to Osowa | 4,881.23 mi (7,855.58 km) |
| Helena to Ostroda | 4,956.43 mi (7,976.61 km) |
| Helena to Ostroleka | 5,028.46 mi (8,092.53 km) |
| Helena to Ostrow Mazowiecka | 5,051.42 mi (8,129.47 km) |
| Helena to Ostrow Wielkopolski | 5,026.09 mi (8,088.70 km) |
| Helena to Ostrowiec Swietokrzyski | 5,150.74 mi (8,289.32 km) |
| Helena to Ostrzeszow | 5,042.27 mi (8,114.75 km) |
| Helena to Oswiecim | 5,152.84 mi (8,292.69 km) |
| Helena to Otwock | 5,077.91 mi (8,172.11 km) |
| Helena to Ozarow Mazowiecki | 5,061.66 mi (8,145.96 km) |
| Helena to Ozimek | 5,091.89 mi (8,194.61 km) |
| Helena to Ozorkow | 5,041.95 mi (8,114.24 km) |
| Helena to Pabianice | 5,062.69 mi (8,147.60 km) |
