| Wheat Ridge to Olivares | 5,038.24 mi (8,108.27 km) |
| Wheat Ridge to Olivenza | 4,944.14 mi (7,956.82 km) |
| Wheat Ridge to Olot | 5,187.61 mi (8,348.64 km) |
| Wheat Ridge to Onate | 4,957.30 mi (7,978.00 km) |
| Wheat Ridge to Onda | 5,177.03 mi (8,331.63 km) |
| Wheat Ridge to Onteniente | 5,213.29 mi (8,389.98 km) |
| Wheat Ridge to Orihuela | 5,231.70 mi (8,419.60 km) |
| Wheat Ridge to Osuna | 5,091.65 mi (8,194.22 km) |
| Wheat Ridge to Ourense | 4,763.65 mi (7,666.35 km) |
| Wheat Ridge to Oviedo | 4,805.66 mi (7,733.96 km) |
| Wheat Ridge to Paiporta | 5,194.32 mi (8,359.45 km) |
| Wheat Ridge to Pajara | 5,045.56 mi (8,120.05 km) |
| Wheat Ridge to Palafolls | 5,220.95 mi (8,402.31 km) |
| Wheat Ridge to Palafrugell | 5,225.73 mi (8,409.99 km) |
| Wheat Ridge to Palamos | 5,227.65 mi (8,413.09 km) |
