| Gaggenau to Oestrich-Winkel | 83.88 mi (134.99 km) |
| Gaggenau to Offenburg | 29.22 mi (47.02 km) |
| Gaggenau to Oftersheim | 40.95 mi (65.91 km) |
| Gaggenau to Ohrdruf | 176.44 mi (283.95 km) |
| Gaggenau to Ohringen | 60.10 mi (96.73 km) |
| Gaggenau to Olbernhau | 258.18 mi (415.50 km) |
| Gaggenau to Olching | 143.41 mi (230.80 km) |
| Gaggenau to Oldenburg | 299.90 mi (482.64 km) |
| Gaggenau to Oldenburg in Holstein | 395.33 mi (636.22 km) |
| Gaggenau to Olfen | 205.45 mi (330.65 km) |
| Gaggenau to Olpe | 154.41 mi (248.50 km) |
| Gaggenau to Olsberg | 176.07 mi (283.35 km) |
| Gaggenau to Oranienburg | 347.19 mi (558.75 km) |
| Gaggenau to Ortenberg | 112.18 mi (180.53 km) |
| Gaggenau to Oschatz | 273.52 mi (440.19 km) |
