| Ionia to Oststeinbek | 4,106.12 mi (6,608.15 km) |
| Ionia to Ottendorf-Okrilla | 4,325.34 mi (6,960.95 km) |
| Ionia to Ottersberg | 4,086.81 mi (6,577.08 km) |
| Ionia to Ottobrunn | 4,371.64 mi (7,035.48 km) |
| Ionia to Ottweiler | 4,151.42 mi (6,681.06 km) |
| Ionia to Overath | 4,098.21 mi (6,595.43 km) |
| Ionia to Oyten | 4,083.56 mi (6,571.85 km) |
| Ionia to Paderborn | 4,123.30 mi (6,635.81 km) |
| Ionia to Papenburg | 4,025.93 mi (6,479.10 km) |
| Ionia to Parchim | 4,168.53 mi (6,708.59 km) |
| Ionia to Pasewalk | 4,239.26 mi (6,822.43 km) |
| Ionia to Passau | 4,417.91 mi (7,109.95 km) |
| Ionia to Pattensen | 4,139.34 mi (6,661.62 km) |
| Ionia to Pegnitz | 4,299.87 mi (6,919.97 km) |
| Ionia to Peine | 4,153.94 mi (6,685.12 km) |
