| Iona to Opole | 5,226.81 mi (8,411.74 km) |
| Iona to Orzesze | 5,274.45 mi (8,488.40 km) |
| Iona to Osowa | 5,140.68 mi (8,273.13 km) |
| Iona to Ostroda | 5,216.76 mi (8,395.56 km) |
| Iona to Ostroleka | 5,295.19 mi (8,521.78 km) |
| Iona to Ostrow Mazowiecka | 5,315.88 mi (8,555.08 km) |
| Iona to Ostrow Wielkopolski | 5,194.20 mi (8,359.26 km) |
| Iona to Ostrowiec Swietokrzyski | 5,355.22 mi (8,618.39 km) |
| Iona to Ostrzeszow | 5,205.39 mi (8,377.26 km) |
| Iona to Oswiecim | 5,296.64 mi (8,524.12 km) |
| Iona to Otwock | 5,313.30 mi (8,550.94 km) |
| Iona to Ozarow Mazowiecki | 5,292.52 mi (8,517.48 km) |
| Iona to Ozimek | 5,237.77 mi (8,429.37 km) |
| Iona to Ozorkow | 5,241.99 mi (8,436.16 km) |
| Iona to Pabianice | 5,255.18 mi (8,457.40 km) |
