| Boulder City to Noventa Vicentina | 5,912.74 mi (9,515.63 km) |
| Boulder City to Novi di Modena | 5,912.81 mi (9,515.74 km) |
| Boulder City to Novi Ligure | 5,850.42 mi (9,415.35 km) |
| Boulder City to Nuoro | 6,096.07 mi (9,810.67 km) |
| Boulder City to Occhiobello | 5,933.18 mi (9,548.53 km) |
| Boulder City to Oderzo | 5,916.79 mi (9,522.16 km) |
| Boulder City to Oggiono | 5,816.77 mi (9,361.19 km) |
| Boulder City to Olbia | 6,071.14 mi (9,770.55 km) |
| Boulder City to Oleggio | 5,802.71 mi (9,338.55 km) |
| Boulder City to Olgiate Comasco | 5,804.30 mi (9,341.12 km) |
| Boulder City to Olgiate Olona | 5,809.21 mi (9,349.02 km) |
| Boulder City to Omegna | 5,781.20 mi (9,303.93 km) |
| Boulder City to Opera | 5,832.85 mi (9,387.07 km) |
| Boulder City to Oppeano | 5,900.72 mi (9,496.29 km) |
| Boulder City to Orbassano | 5,796.17 mi (9,328.04 km) |
