| Tucson to Noventa Vicentina | 5,985.14 mi (9,632.15 km) |
| Tucson to Novi di Modena | 5,981.71 mi (9,626.64 km) |
| Tucson to Novi Ligure | 5,912.43 mi (9,515.14 km) |
| Tucson to Nuoro | 6,141.17 mi (9,883.26 km) |
| Tucson to Occhiobello | 6,004.26 mi (9,662.93 km) |
| Tucson to Oderzo | 5,994.07 mi (9,646.53 km) |
| Tucson to Oggiono | 5,884.73 mi (9,470.56 km) |
| Tucson to Olbia | 6,119.28 mi (9,848.03 km) |
| Tucson to Oleggio | 5,867.80 mi (9,443.31 km) |
| Tucson to Olgiate Comasco | 5,871.14 mi (9,448.69 km) |
| Tucson to Olgiate Olona | 5,875.17 mi (9,455.18 km) |
| Tucson to Omegna | 5,846.80 mi (9,409.52 km) |
| Tucson to Opera | 5,898.75 mi (9,493.12 km) |
| Tucson to Oppeano | 5,972.13 mi (9,611.21 km) |
| Tucson to Orbassano | 5,855.55 mi (9,423.59 km) |
