| Ionia to Noventa Vicentina | 4,479.79 mi (7,209.52 km) |
| Ionia to Novi di Modena | 4,471.02 mi (7,195.40 km) |
| Ionia to Novi Ligure | 4,392.49 mi (7,069.02 km) |
| Ionia to Nuoro | 4,597.00 mi (7,398.15 km) |
| Ionia to Occhiobello | 4,496.58 mi (7,236.55 km) |
| Ionia to Oderzo | 4,496.44 mi (7,236.32 km) |
| Ionia to Oggiono | 4,373.95 mi (7,039.20 km) |
| Ionia to Olbia | 4,578.86 mi (7,368.96 km) |
| Ionia to Oleggio | 4,352.95 mi (7,005.39 km) |
| Ionia to Olgiate Comasco | 4,358.86 mi (7,014.90 km) |
| Ionia to Olgiate Olona | 4,361.52 mi (7,019.19 km) |
| Ionia to Omegna | 4,333.01 mi (6,973.30 km) |
| Ionia to Opera | 4,384.67 mi (7,056.44 km) |
| Ionia to Oppeano | 4,465.42 mi (7,186.41 km) |
| Ionia to Orbassano | 4,332.59 mi (6,972.63 km) |
