| Gardelegen to Oestrich-Winkel | 227.95 mi (366.85 km) |
| Gardelegen to Offenburg | 318.96 mi (513.32 km) |
| Gardelegen to Oftersheim | 249.92 mi (402.21 km) |
| Gardelegen to Ohrdruf | 120.70 mi (194.24 km) |
| Gardelegen to Ohringen | 244.18 mi (392.97 km) |
| Gardelegen to Olbernhau | 153.12 mi (246.42 km) |
| Gardelegen to Olching | 298.94 mi (481.10 km) |
| Gardelegen to Oldenburg | 139.35 mi (224.27 km) |
| Gardelegen to Oldenburg in Holstein | 124.32 mi (200.08 km) |
| Gardelegen to Olfen | 179.02 mi (288.10 km) |
| Gardelegen to Olpe | 184.46 mi (296.86 km) |
| Gardelegen to Olsberg | 148.18 mi (238.48 km) |
| Gardelegen to Oranienburg | 78.92 mi (127.00 km) |
| Gardelegen to Ortenberg | 180.60 mi (290.65 km) |
| Gardelegen to Oschatz | 111.88 mi (180.05 km) |
