| Highlands Ranch to Nyon | 5,142.26 mi (8,275.67 km) |
| Highlands Ranch to Oberriet | 5,214.47 mi (8,391.87 km) |
| Highlands Ranch to Obersiggenthal | 5,162.93 mi (8,308.94 km) |
| Highlands Ranch to Oberwil | 5,136.32 mi (8,266.10 km) |
| Highlands Ranch to Oberwingert | 5,177.83 mi (8,332.91 km) |
| Highlands Ranch to Oftringen | 5,157.99 mi (8,300.98 km) |
| Highlands Ranch to Olten | 5,155.85 mi (8,297.55 km) |
| Highlands Ranch to Onex | 5,146.70 mi (8,282.82 km) |
| Highlands Ranch to Opfikon | 5,174.86 mi (8,328.13 km) |
| Highlands Ranch to Ostermundigen | 5,160.04 mi (8,304.28 km) |
| Highlands Ranch to Payerne | 5,147.00 mi (8,283.30 km) |
| Highlands Ranch to Pfaffikon | 5,185.40 mi (8,345.10 km) |
| Highlands Ranch to Plan-les-Ouates | 5,148.06 mi (8,285.00 km) |
| Highlands Ranch to Pratteln | 5,141.18 mi (8,273.93 km) |
| Highlands Ranch to Prilly | 5,148.36 mi (8,285.48 km) |
