| Tortosa to Oberkirch | 649.39 mi (1,045.10 km) |
| Tortosa to Obernburg am Main | 750.17 mi (1,207.29 km) |
| Tortosa to Obernkirchen | 889.18 mi (1,430.99 km) |
| Tortosa to Oberschleissheim | 746.98 mi (1,202.15 km) |
| Tortosa to Oberstdorf | 663.96 mi (1,068.55 km) |
| Tortosa to Obertraubling | 799.74 mi (1,287.06 km) |
| Tortosa to Obertshausen | 754.74 mi (1,214.64 km) |
| Tortosa to Oberursel | 756.06 mi (1,216.76 km) |
| Tortosa to Ochsenfurt | 765.90 mi (1,232.59 km) |
| Tortosa to Ochsenhausen | 683.00 mi (1,099.18 km) |
| Tortosa to Ochtrup | 847.79 mi (1,364.38 km) |
| Tortosa to Odenthal | 773.31 mi (1,244.53 km) |
| Tortosa to Oelde | 842.90 mi (1,356.51 km) |
| Tortosa to Oelsnitz | 868.04 mi (1,396.97 km) |
| Tortosa to Oer-Erkenschwick | 813.62 mi (1,309.40 km) |
