| Wheat Ridge to Opole | 5,302.73 mi (8,533.92 km) |
| Wheat Ridge to Orzesze | 5,353.28 mi (8,615.27 km) |
| Wheat Ridge to Osowa | 5,123.37 mi (8,245.27 km) |
| Wheat Ridge to Ostroda | 5,201.12 mi (8,370.39 km) |
| Wheat Ridge to Ostroleka | 5,277.00 mi (8,492.52 km) |
| Wheat Ridge to Ostrow Mazowiecka | 5,300.06 mi (8,529.62 km) |
| Wheat Ridge to Ostrow Wielkopolski | 5,248.57 mi (8,446.76 km) |
| Wheat Ridge to Ostrowiec Swietokrzyski | 5,386.63 mi (8,668.95 km) |
| Wheat Ridge to Ostrzeszow | 5,263.93 mi (8,471.47 km) |
| Wheat Ridge to Oswiecim | 5,372.76 mi (8,646.62 km) |
| Wheat Ridge to Otwock | 5,319.73 mi (8,561.28 km) |
| Wheat Ridge to Ozarow Mazowiecki | 5,301.80 mi (8,532.43 km) |
| Wheat Ridge to Ozimek | 5,310.50 mi (8,546.42 km) |
| Wheat Ridge to Ozorkow | 5,273.37 mi (8,486.68 km) |
| Wheat Ridge to Pabianice | 5,292.75 mi (8,517.86 km) |
