| Idar-Oberstein to Orzesze | 509.07 mi (819.27 km) |
| Idar-Oberstein to Osowa | 574.06 mi (923.86 km) |
| Idar-Oberstein to Ostroda | 606.68 mi (976.36 km) |
| Idar-Oberstein to Ostroleka | 655.46 mi (1,054.86 km) |
| Idar-Oberstein to Ostrow Mazowiecka | 664.49 mi (1,069.40 km) |
| Idar-Oberstein to Ostrow Wielkopolski | 478.46 mi (770.00 km) |
| Idar-Oberstein to Ostrowiec Swietokrzyski | 626.15 mi (1,007.70 km) |
| Idar-Oberstein to Ostrzeszow | 480.30 mi (772.96 km) |
| Idar-Oberstein to Oswiecim | 530.17 mi (853.23 km) |
| Idar-Oberstein to Otwock | 629.05 mi (1,012.35 km) |
| Idar-Oberstein to Ozarow Mazowiecki | 610.85 mi (983.07 km) |
| Idar-Oberstein to Ozimek | 486.26 mi (782.56 km) |
| Idar-Oberstein to Ozorkow | 544.31 mi (875.99 km) |
| Idar-Oberstein to Pabianice | 544.45 mi (876.20 km) |
| Idar-Oberstein to Parczew | 692.49 mi (1,114.45 km) |
