| Birsfelden to Oerlinghausen | 308.46 mi (496.42 km) |
| Birsfelden to Oestrich-Winkel | 169.92 mi (273.46 km) |
| Birsfelden to Offenburg | 64.72 mi (104.15 km) |
| Birsfelden to Oftersheim | 133.06 mi (214.14 km) |
| Birsfelden to Ohrdruf | 266.24 mi (428.47 km) |
| Birsfelden to Ohringen | 142.69 mi (229.64 km) |
| Birsfelden to Olbernhau | 335.94 mi (540.65 km) |
| Birsfelden to Olching | 176.88 mi (284.66 km) |
| Birsfelden to Oldenburg | 387.15 mi (623.05 km) |
| Birsfelden to Oldenburg in Holstein | 487.16 mi (784.00 km) |
| Birsfelden to Olfen | 287.86 mi (463.27 km) |
| Birsfelden to Olpe | 239.48 mi (385.41 km) |
| Birsfelden to Olsberg | 265.15 mi (426.72 km) |
| Birsfelden to Oranienburg | 436.63 mi (702.69 km) |
| Birsfelden to Ortenberg | 204.23 mi (328.68 km) |
