| Glarus to Oerlinghausen | 341.34 mi (549.33 km) |
| Glarus to Oestrich-Winkel | 210.71 mi (339.10 km) |
| Glarus to Offenburg | 112.16 mi (180.51 km) |
| Glarus to Oftersheim | 163.01 mi (262.34 km) |
| Glarus to Ohrdruf | 272.87 mi (439.13 km) |
| Glarus to Ohringen | 151.03 mi (243.06 km) |
| Glarus to Olbernhau | 317.14 mi (510.39 km) |
| Glarus to Olching | 132.20 mi (212.76 km) |
| Glarus to Oldenburg | 423.88 mi (682.17 km) |
| Glarus to Oldenburg in Holstein | 508.30 mi (818.03 km) |
| Glarus to Olfen | 332.31 mi (534.80 km) |
| Glarus to Olpe | 280.83 mi (451.95 km) |
| Glarus to Olsberg | 299.41 mi (481.86 km) |
| Glarus to Oranienburg | 436.52 mi (702.51 km) |
| Glarus to Ortenberg | 229.56 mi (369.45 km) |
