| Glarus to Oberkirch | 113.25 mi (182.25 km) |
| Glarus to Obernburg am Main | 193.95 mi (312.14 km) |
| Glarus to Obernkirchen | 361.58 mi (581.91 km) |
| Glarus to Oberschleissheim | 143.56 mi (231.03 km) |
| Glarus to Oberstdorf | 62.56 mi (100.68 km) |
| Glarus to Obertraubling | 195.86 mi (315.20 km) |
| Glarus to Obertshausen | 209.86 mi (337.74 km) |
| Glarus to Oberursel | 220.16 mi (354.32 km) |
| Glarus to Ochsenfurt | 186.53 mi (300.20 km) |
| Glarus to Ochsenhausen | 82.71 mi (133.12 km) |
| Glarus to Ochtrup | 367.07 mi (590.75 km) |
| Glarus to Odenthal | 290.12 mi (466.90 km) |
| Glarus to Oelde | 334.19 mi (537.82 km) |
| Glarus to Oelsnitz | 273.10 mi (439.51 km) |
| Glarus to Oer-Erkenschwick | 328.74 mi (529.06 km) |
