| Irmo to Noventa Vicentina | 4,715.15 mi (7,588.30 km) |
| Irmo to Novi di Modena | 4,699.86 mi (7,563.70 km) |
| Irmo to Novi Ligure | 4,610.99 mi (7,420.67 km) |
| Irmo to Nuoro | 4,773.54 mi (7,682.27 km) |
| Irmo to Occhiobello | 4,728.63 mi (7,609.99 km) |
| Irmo to Oderzo | 4,740.70 mi (7,629.41 km) |
| Irmo to Oggiono | 4,605.12 mi (7,411.23 km) |
| Irmo to Olbia | 4,762.14 mi (7,663.92 km) |
| Irmo to Oleggio | 4,579.32 mi (7,369.70 km) |
| Irmo to Olgiate Comasco | 4,588.45 mi (7,384.40 km) |
| Irmo to Olgiate Olona | 4,589.26 mi (7,385.70 km) |
| Irmo to Omegna | 4,561.28 mi (7,340.67 km) |
| Irmo to Opera | 4,611.27 mi (7,421.12 km) |
| Irmo to Oppeano | 4,699.46 mi (7,563.06 km) |
| Irmo to Orbassano | 4,548.39 mi (7,319.93 km) |
