| Iver to Opole | 800.23 mi (1,287.85 km) |
| Iver to Orzesze | 843.14 mi (1,356.90 km) |
| Iver to Osowa | 811.98 mi (1,306.75 km) |
| Iver to Ostroda | 868.91 mi (1,398.38 km) |
| Iver to Ostroleka | 935.12 mi (1,504.93 km) |
| Iver to Ostrow Mazowiecka | 949.94 mi (1,528.78 km) |
| Iver to Ostrow Wielkopolski | 784.63 mi (1,262.74 km) |
| Iver to Ostrowiec Swietokrzyski | 945.21 mi (1,521.17 km) |
| Iver to Ostrzeszow | 791.62 mi (1,273.99 km) |
| Iver to Oswiecim | 865.29 mi (1,392.54 km) |
| Iver to Otwock | 927.37 mi (1,492.46 km) |
| Iver to Ozarow Mazowiecki | 907.00 mi (1,459.67 km) |
| Iver to Ozimek | 812.16 mi (1,307.04 km) |
| Iver to Ozorkow | 844.59 mi (1,359.24 km) |
| Iver to Pabianice | 851.31 mi (1,370.05 km) |
