| Donostia to Oberkirch | 602.22 mi (969.18 km) |
| Donostia to Obernburg am Main | 692.91 mi (1,115.13 km) |
| Donostia to Obernkirchen | 802.80 mi (1,291.98 km) |
| Donostia to Oberschleissheim | 734.81 mi (1,182.56 km) |
| Donostia to Oberstdorf | 657.81 mi (1,058.64 km) |
| Donostia to Obertraubling | 779.77 mi (1,254.91 km) |
| Donostia to Obertshausen | 691.50 mi (1,112.86 km) |
| Donostia to Oberursel | 688.59 mi (1,108.19 km) |
| Donostia to Ochsenfurt | 719.48 mi (1,157.89 km) |
| Donostia to Ochsenhausen | 661.64 mi (1,064.81 km) |
| Donostia to Ochtrup | 745.93 mi (1,200.46 km) |
| Donostia to Odenthal | 681.98 mi (1,097.55 km) |
| Donostia to Oelde | 752.82 mi (1,211.54 km) |
| Donostia to Oelsnitz | 826.59 mi (1,330.28 km) |
| Donostia to Oer-Erkenschwick | 717.44 mi (1,154.60 km) |
