| Nea Ionia to Oerlinghausen | 1,207.28 mi (1,942.93 km) |
| Nea Ionia to Oestrich-Winkel | 1,133.89 mi (1,824.82 km) |
| Nea Ionia to Offenburg | 1,070.02 mi (1,722.04 km) |
| Nea Ionia to Oftersheim | 1,085.73 mi (1,747.32 km) |
| Nea Ionia to Ohrdruf | 1,089.25 mi (1,752.98 km) |
| Nea Ionia to Ohringen | 1,046.96 mi (1,684.92 km) |
| Nea Ionia to Olbernhau | 1,011.08 mi (1,627.18 km) |
| Nea Ionia to Olching | 939.25 mi (1,511.58 km) |
| Nea Ionia to Oldenburg | 1,280.24 mi (2,060.34 km) |
| Nea Ionia to Oldenburg in Holstein | 1,276.93 mi (2,055.02 km) |
| Nea Ionia to Olfen | 1,233.56 mi (1,985.22 km) |
| Nea Ionia to Olpe | 1,186.26 mi (1,909.11 km) |
| Nea Ionia to Olsberg | 1,182.05 mi (1,902.33 km) |
| Nea Ionia to Oranienburg | 1,135.12 mi (1,826.80 km) |
| Nea Ionia to Ortenberg | 1,116.03 mi (1,796.08 km) |
