| Ioannina to Oegstgeest | 1,164.43 mi (1,873.97 km) |
| Ioannina to Oirschot | 1,106.50 mi (1,780.74 km) |
| Ioannina to Oisterwijk | 1,113.53 mi (1,792.06 km) |
| Ioannina to Oldebroek | 1,133.09 mi (1,823.53 km) |
| Ioannina to Oldenzaal | 1,096.34 mi (1,764.38 km) |
| Ioannina to Ommen | 1,121.29 mi (1,804.54 km) |
| Ioannina to Oosterend | 1,155.84 mi (1,860.14 km) |
| Ioannina to Oosterhout | 1,127.32 mi (1,814.25 km) |
| Ioannina to Oosterwolde | 1,148.81 mi (1,848.83 km) |
| Ioannina to Oostzaan | 1,163.02 mi (1,871.69 km) |
| Ioannina to Opmeer | 1,173.64 mi (1,888.79 km) |
| Ioannina to Oss | 1,111.98 mi (1,789.56 km) |
| Ioannina to Oud-Beijerland | 1,149.97 mi (1,850.70 km) |
| Ioannina to Oudenbosch | 1,135.76 mi (1,827.83 km) |
| Ioannina to Oudewater | 1,144.10 mi (1,841.25 km) |
