| Highland Springs to Oberkirch | 4,151.54 mi (6,681.25 km) |
| Highland Springs to Obernburg am Main | 4,158.06 mi (6,691.75 km) |
| Highland Springs to Obernkirchen | 4,090.12 mi (6,582.41 km) |
| Highland Springs to Oberschleissheim | 4,304.33 mi (6,927.15 km) |
| Highland Springs to Oberstdorf | 4,276.49 mi (6,882.34 km) |
| Highland Springs to Obertraubling | 4,306.84 mi (6,931.18 km) |
| Highland Springs to Obertshausen | 4,139.17 mi (6,661.34 km) |
| Highland Springs to Oberursel | 4,124.97 mi (6,638.50 km) |
| Highland Springs to Ochsenfurt | 4,201.09 mi (6,761.00 km) |
| Highland Springs to Ochsenhausen | 4,242.69 mi (6,827.94 km) |
| Highland Springs to Ochtrup | 4,016.25 mi (6,463.53 km) |
| Highland Springs to Odenthal | 4,043.65 mi (6,507.62 km) |
| Highland Springs to Oelde | 4,063.73 mi (6,539.94 km) |
| Highland Springs to Oelsnitz | 4,262.68 mi (6,860.11 km) |
| Highland Springs to Oer-Erkenschwick | 4,033.13 mi (6,490.70 km) |
