| San Marcos to Oberkirch | 5,863.57 mi (9,436.51 km) |
| San Marcos to Obernburg am Main | 5,830.17 mi (9,382.75 km) |
| San Marcos to Obernkirchen | 5,706.43 mi (9,183.62 km) |
| San Marcos to Oberschleissheim | 5,985.25 mi (9,632.34 km) |
| San Marcos to Oberstdorf | 5,989.44 mi (9,639.08 km) |
| San Marcos to Obertraubling | 5,965.61 mi (9,600.72 km) |
| San Marcos to Obertshausen | 5,809.37 mi (9,349.28 km) |
| San Marcos to Oberursel | 5,794.72 mi (9,325.70 km) |
| San Marcos to Ochsenfurt | 5,867.70 mi (9,443.15 km) |
| San Marcos to Ochsenhausen | 5,945.09 mi (9,567.70 km) |
| San Marcos to Ochtrup | 5,653.24 mi (9,098.01 km) |
| San Marcos to Odenthal | 5,709.04 mi (9,187.81 km) |
| San Marcos to Oelde | 5,700.07 mi (9,173.38 km) |
| San Marcos to Oelsnitz | 5,889.37 mi (9,478.02 km) |
| San Marcos to Oer-Erkenschwick | 5,682.92 mi (9,145.78 km) |
