| Highlands Ranch to Opole | 5,312.26 mi (8,549.26 km) |
| Highlands Ranch to Orzesze | 5,362.82 mi (8,630.63 km) |
| Highlands Ranch to Osowa | 5,133.61 mi (8,261.74 km) |
| Highlands Ranch to Ostroda | 5,211.40 mi (8,386.94 km) |
| Highlands Ranch to Ostroleka | 5,287.37 mi (8,509.20 km) |
| Highlands Ranch to Ostrow Mazowiecka | 5,310.42 mi (8,546.30 km) |
| Highlands Ranch to Ostrow Wielkopolski | 5,258.26 mi (8,462.35 km) |
| Highlands Ranch to Ostrowiec Swietokrzyski | 5,396.64 mi (8,685.05 km) |
| Highlands Ranch to Ostrzeszow | 5,273.59 mi (8,487.02 km) |
| Highlands Ranch to Oswiecim | 5,382.34 mi (8,662.04 km) |
| Highlands Ranch to Otwock | 5,329.91 mi (8,577.66 km) |
| Highlands Ranch to Ozarow Mazowiecki | 5,311.94 mi (8,548.74 km) |
| Highlands Ranch to Ozimek | 5,320.06 mi (8,561.81 km) |
| Highlands Ranch to Ozorkow | 5,283.29 mi (8,502.64 km) |
| Highlands Ranch to Pabianice | 5,302.63 mi (8,533.75 km) |
