| Solothurn to Oerlinghausen | 332.08 mi (534.44 km) |
| Solothurn to Oestrich-Winkel | 193.48 mi (311.38 km) |
| Solothurn to Offenburg | 88.34 mi (142.16 km) |
| Solothurn to Oftersheim | 156.47 mi (251.81 km) |
| Solothurn to Ohrdruf | 288.51 mi (464.32 km) |
| Solothurn to Ohringen | 164.24 mi (264.32 km) |
| Solothurn to Olbernhau | 354.92 mi (571.19 km) |
| Solothurn to Olching | 188.54 mi (303.43 km) |
| Solothurn to Oldenburg | 410.63 mi (660.85 km) |
| Solothurn to Oldenburg in Holstein | 510.69 mi (821.88 km) |
| Solothurn to Olfen | 310.99 mi (500.49 km) |
| Solothurn to Olpe | 262.90 mi (423.10 km) |
| Solothurn to Olsberg | 288.77 mi (464.73 km) |
| Solothurn to Oranienburg | 458.59 mi (738.03 km) |
| Solothurn to Ortenberg | 227.68 mi (366.41 km) |
