| Sigmaringen to Oerlinghausen | 269.19 mi (433.22 km) |
| Sigmaringen to Oestrich-Winkel | 143.21 mi (230.48 km) |
| Sigmaringen to Offenburg | 64.58 mi (103.93 km) |
| Sigmaringen to Oftersheim | 93.26 mi (150.09 km) |
| Sigmaringen to Ohrdruf | 201.27 mi (323.92 km) |
| Sigmaringen to Ohringen | 78.00 mi (125.53 km) |
| Sigmaringen to Olbernhau | 256.98 mi (413.57 km) |
| Sigmaringen to Olching | 97.14 mi (156.34 km) |
| Sigmaringen to Oldenburg | 352.16 mi (566.75 km) |
| Sigmaringen to Oldenburg in Holstein | 435.29 mi (700.53 km) |
| Sigmaringen to Olfen | 263.72 mi (424.42 km) |
| Sigmaringen to Olpe | 211.71 mi (340.72 km) |
| Sigmaringen to Olsberg | 227.83 mi (366.66 km) |
| Sigmaringen to Oranienburg | 367.74 mi (591.83 km) |
| Sigmaringen to Ortenberg | 156.95 mi (252.58 km) |
