| Trondheim to Noventa Vicentina | 1,254.59 mi (2,019.06 km) |
| Trondheim to Novi di Modena | 1,280.89 mi (2,061.39 km) |
| Trondheim to Novi Ligure | 1,291.55 mi (2,078.55 km) |
| Trondheim to Nuoro | 1,597.54 mi (2,571.00 km) |
| Trondheim to Occhiobello | 1,279.63 mi (2,059.37 km) |
| Trondheim to Oderzo | 1,222.15 mi (1,966.86 km) |
| Trondheim to Oggiono | 1,219.92 mi (1,963.28 km) |
| Trondheim to Olbia | 1,555.92 mi (2,504.01 km) |
| Trondheim to Oleggio | 1,233.82 mi (1,985.64 km) |
| Trondheim to Olgiate Comasco | 1,220.51 mi (1,964.22 km) |
| Trondheim to Olgiate Olona | 1,231.02 mi (1,981.13 km) |
| Trondheim to Omegna | 1,215.15 mi (1,955.60 km) |
| Trondheim to Opera | 1,247.73 mi (2,008.03 km) |
| Trondheim to Oppeano | 1,253.02 mi (2,016.54 km) |
| Trondheim to Orbassano | 1,277.78 mi (2,056.38 km) |
