| Ioannina to Oerlinghausen | 1,029.92 mi (1,657.50 km) |
| Ioannina to Oestrich-Winkel | 949.49 mi (1,528.06 km) |
| Ioannina to Offenburg | 881.70 mi (1,418.96 km) |
| Ioannina to Oftersheim | 900.55 mi (1,449.30 km) |
| Ioannina to Ohrdruf | 913.21 mi (1,469.66 km) |
| Ioannina to Ohringen | 862.87 mi (1,388.65 km) |
| Ioannina to Olbernhau | 842.83 mi (1,356.41 km) |
| Ioannina to Olching | 755.76 mi (1,216.28 km) |
| Ioannina to Oldenburg | 1,105.48 mi (1,779.10 km) |
| Ioannina to Oldenburg in Holstein | 1,112.58 mi (1,790.53 km) |
| Ioannina to Olfen | 1,052.92 mi (1,694.52 km) |
| Ioannina to Olpe | 1,004.43 mi (1,616.47 km) |
| Ioannina to Olsberg | 1,002.43 mi (1,613.25 km) |
| Ioannina to Oranienburg | 973.71 mi (1,567.04 km) |
| Ioannina to Ortenberg | 934.55 mi (1,504.01 km) |
