| Ridge to Opole | 4,147.06 mi (6,674.05 km) |
| Ridge to Orzesze | 4,195.97 mi (6,752.76 km) |
| Ridge to Osowa | 4,043.12 mi (6,506.78 km) |
| Ridge to Ostroda | 4,120.35 mi (6,631.06 km) |
| Ridge to Ostroleka | 4,199.30 mi (6,758.12 km) |
| Ridge to Ostrow Mazowiecka | 4,220.61 mi (6,792.41 km) |
| Ridge to Ostrow Wielkopolski | 4,109.74 mi (6,613.98 km) |
| Ridge to Ostrowiec Swietokrzyski | 4,268.58 mi (6,869.62 km) |
| Ridge to Ostrzeszow | 4,121.88 mi (6,633.53 km) |
| Ridge to Oswiecim | 4,217.92 mi (6,788.09 km) |
| Ridge to Otwock | 4,221.69 mi (6,794.16 km) |
| Ridge to Ozarow Mazowiecki | 4,201.14 mi (6,761.08 km) |
| Ridge to Ozimek | 4,157.52 mi (6,690.89 km) |
| Ridge to Ozorkow | 4,153.87 mi (6,685.01 km) |
| Ridge to Pabianice | 4,168.37 mi (6,708.35 km) |
