| Martha Lake to Oberkirch | 5,144.27 mi (8,278.90 km) |
| Martha Lake to Obernburg am Main | 5,092.82 mi (8,196.10 km) |
| Martha Lake to Obernkirchen | 4,949.87 mi (7,966.04 km) |
| Martha Lake to Oberschleissheim | 5,243.41 mi (8,438.45 km) |
| Martha Lake to Oberstdorf | 5,263.41 mi (8,470.64 km) |
| Martha Lake to Obertraubling | 5,214.14 mi (8,391.35 km) |
| Martha Lake to Obertshausen | 5,072.29 mi (8,163.06 km) |
| Martha Lake to Oberursel | 5,058.27 mi (8,140.50 km) |
| Martha Lake to Ochsenfurt | 5,125.52 mi (8,248.73 km) |
| Martha Lake to Ochsenhausen | 5,216.21 mi (8,394.68 km) |
| Martha Lake to Ochtrup | 4,909.41 mi (7,900.93 km) |
| Martha Lake to Odenthal | 4,975.49 mi (8,007.28 km) |
| Martha Lake to Oelde | 4,953.17 mi (7,971.36 km) |
| Martha Lake to Oelsnitz | 5,127.14 mi (8,251.33 km) |
| Martha Lake to Oer-Erkenschwick | 4,943.40 mi (7,955.64 km) |
