| Johnstown to Oberkirch | 4,093.64 mi (6,588.08 km) |
| Johnstown to Obernburg am Main | 4,094.17 mi (6,588.92 km) |
| Johnstown to Obernkirchen | 4,017.40 mi (6,465.39 km) |
| Johnstown to Oberschleissheim | 4,243.22 mi (6,828.81 km) |
| Johnstown to Oberstdorf | 4,219.96 mi (6,791.37 km) |
| Johnstown to Obertraubling | 4,242.48 mi (6,827.62 km) |
| Johnstown to Obertshausen | 4,074.80 mi (6,557.75 km) |
| Johnstown to Oberursel | 4,060.39 mi (6,534.56 km) |
| Johnstown to Ochsenfurt | 4,136.82 mi (6,657.57 km) |
| Johnstown to Ochsenhausen | 4,184.21 mi (6,733.84 km) |
| Johnstown to Ochtrup | 3,945.70 mi (6,349.99 km) |
| Johnstown to Odenthal | 3,977.57 mi (6,401.27 km) |
| Johnstown to Oelde | 3,993.60 mi (6,427.08 km) |
| Johnstown to Oelsnitz | 4,193.25 mi (6,748.39 km) |
| Johnstown to Oer-Erkenschwick | 3,964.63 mi (6,380.46 km) |
