| Boulder City to Nyon | 5,684.06 mi (9,147.62 km) |
| Boulder City to Oberriet | 5,745.35 mi (9,246.25 km) |
| Boulder City to Obersiggenthal | 5,696.26 mi (9,167.25 km) |
| Boulder City to Oberwil | 5,671.27 mi (9,127.03 km) |
| Boulder City to Oberwingert | 5,709.93 mi (9,189.24 km) |
| Boulder City to Oftringen | 5,692.79 mi (9,161.66 km) |
| Boulder City to Olten | 5,690.58 mi (9,158.10 km) |
| Boulder City to Onex | 5,689.47 mi (9,156.31 km) |
| Boulder City to Opfikon | 5,707.73 mi (9,185.70 km) |
| Boulder City to Ostermundigen | 5,697.07 mi (9,168.55 km) |
| Boulder City to Payerne | 5,685.78 mi (9,150.38 km) |
| Boulder City to Pfaffikon | 5,718.00 mi (9,202.23 km) |
| Boulder City to Plan-les-Ouates | 5,690.84 mi (9,158.53 km) |
| Boulder City to Pratteln | 5,675.79 mi (9,134.30 km) |
| Boulder City to Prilly | 5,688.84 mi (9,155.31 km) |
