| Front Royal to Oberkirch | 4,125.63 mi (6,639.56 km) |
| Front Royal to Obernburg am Main | 4,129.11 mi (6,645.16 km) |
| Front Royal to Obernkirchen | 4,056.67 mi (6,528.57 km) |
| Front Royal to Oberschleissheim | 4,276.86 mi (6,882.94 km) |
| Front Royal to Oberstdorf | 4,251.33 mi (6,841.85 km) |
| Front Royal to Obertraubling | 4,277.72 mi (6,884.32 km) |
| Front Royal to Obertshausen | 4,109.97 mi (6,614.36 km) |
| Front Royal to Oberursel | 4,095.66 mi (6,591.32 km) |
| Front Royal to Ochsenfurt | 4,171.97 mi (6,714.14 km) |
| Front Royal to Ochsenhausen | 4,216.52 mi (6,785.84 km) |
| Front Royal to Ochtrup | 3,983.86 mi (6,411.40 km) |
| Front Royal to Odenthal | 4,013.54 mi (6,459.17 km) |
| Front Royal to Oelde | 4,031.58 mi (6,488.20 km) |
| Front Royal to Oelsnitz | 4,230.97 mi (6,809.08 km) |
| Front Royal to Oer-Erkenschwick | 4,001.79 mi (6,440.26 km) |
