| Highland Springs to Oerlinghausen | 4,080.52 mi (6,566.95 km) |
| Highland Springs to Oestrich-Winkel | 4,107.14 mi (6,609.81 km) |
| Highland Springs to Offenburg | 4,147.16 mi (6,674.21 km) |
| Highland Springs to Oftersheim | 4,148.59 mi (6,676.51 km) |
| Highland Springs to Ohrdruf | 4,193.70 mi (6,749.11 km) |
| Highland Springs to Ohringen | 4,191.02 mi (6,744.80 km) |
| Highland Springs to Olbernhau | 4,301.09 mi (6,921.93 km) |
| Highland Springs to Olching | 4,295.56 mi (6,913.03 km) |
| Highland Springs to Oldenburg | 4,032.07 mi (6,488.98 km) |
| Highland Springs to Oldenburg in Holstein | 4,102.58 mi (6,602.46 km) |
| Highland Springs to Olfen | 4,036.46 mi (6,496.05 km) |
| Highland Springs to Olpe | 4,072.85 mi (6,554.62 km) |
| Highland Springs to Olsberg | 4,089.84 mi (6,581.96 km) |
| Highland Springs to Oranienburg | 4,234.45 mi (6,814.70 km) |
| Highland Springs to Ortenberg | 4,140.05 mi (6,662.77 km) |
