| Tortosa to Oerlinghausen | 861.66 mi (1,386.71 km) |
| Tortosa to Oestrich-Winkel | 730.30 mi (1,175.30 km) |
| Tortosa to Offenburg | 641.57 mi (1,032.50 km) |
| Tortosa to Oftersheim | 709.27 mi (1,141.46 km) |
| Tortosa to Ohrdruf | 847.20 mi (1,363.44 km) |
| Tortosa to Ohringen | 725.72 mi (1,167.93 km) |
| Tortosa to Olbernhau | 916.81 mi (1,475.46 km) |
| Tortosa to Olching | 735.92 mi (1,184.34 km) |
| Tortosa to Oldenburg | 924.70 mi (1,488.17 km) |
| Tortosa to Oldenburg in Holstein | 1,047.18 mi (1,685.27 km) |
| Tortosa to Olfen | 820.73 mi (1,320.85 km) |
| Tortosa to Olpe | 786.88 mi (1,266.36 km) |
| Tortosa to Olsberg | 820.88 mi (1,321.07 km) |
| Tortosa to Oranienburg | 1,017.92 mi (1,638.19 km) |
| Tortosa to Ortenberg | 776.72 mi (1,250.01 km) |
