| Iona to Oerlinghausen | 4,821.38 mi (7,759.26 km) |
| Iona to Oestrich-Winkel | 4,834.93 mi (7,781.07 km) |
| Iona to Offenburg | 4,864.80 mi (7,829.14 km) |
| Iona to Oftersheim | 4,873.27 mi (7,842.77 km) |
| Iona to Ohrdruf | 4,930.77 mi (7,935.31 km) |
| Iona to Ohringen | 4,916.12 mi (7,911.73 km) |
| Iona to Olbernhau | 5,041.25 mi (8,113.10 km) |
| Iona to Olching | 5,017.48 mi (8,074.86 km) |
| Iona to Oldenburg | 4,779.20 mi (7,691.38 km) |
| Iona to Oldenburg in Holstein | 4,859.13 mi (7,820.01 km) |
| Iona to Olfen | 4,774.10 mi (7,683.18 km) |
| Iona to Olpe | 4,806.80 mi (7,735.80 km) |
| Iona to Olsberg | 4,826.75 mi (7,767.91 km) |
| Iona to Oranienburg | 4,985.86 mi (8,023.97 km) |
| Iona to Ortenberg | 4,871.71 mi (7,840.25 km) |
