| Donostia to Oerlinghausen | 774.61 mi (1,246.61 km) |
| Donostia to Oestrich-Winkel | 659.99 mi (1,062.15 km) |
| Donostia to Offenburg | 593.95 mi (955.87 km) |
| Donostia to Oftersheim | 653.67 mi (1,051.98 km) |
| Donostia to Ohrdruf | 789.87 mi (1,271.17 km) |
| Donostia to Ohringen | 681.28 mi (1,096.42 km) |
| Donostia to Olbernhau | 879.57 mi (1,415.53 km) |
| Donostia to Olching | 722.86 mi (1,163.33 km) |
| Donostia to Oldenburg | 823.37 mi (1,325.09 km) |
| Donostia to Oldenburg in Holstein | 955.06 mi (1,537.02 km) |
| Donostia to Olfen | 725.04 mi (1,166.83 km) |
| Donostia to Olpe | 702.54 mi (1,130.64 km) |
| Donostia to Olsberg | 738.73 mi (1,188.88 km) |
| Donostia to Oranienburg | 955.12 mi (1,537.12 km) |
| Donostia to Ortenberg | 711.62 mi (1,145.24 km) |
