| Alcanar to Oberkirch | 666.32 mi (1,072.34 km) |
| Alcanar to Obernburg am Main | 767.28 mi (1,234.81 km) |
| Alcanar to Obernkirchen | 907.04 mi (1,459.74 km) |
| Alcanar to Oberschleissheim | 762.15 mi (1,226.57 km) |
| Alcanar to Oberstdorf | 679.04 mi (1,092.81 km) |
| Alcanar to Obertraubling | 815.19 mi (1,311.92 km) |
| Alcanar to Obertshausen | 772.05 mi (1,242.49 km) |
| Alcanar to Oberursel | 773.50 mi (1,244.82 km) |
| Alcanar to Ochsenfurt | 782.57 mi (1,259.43 km) |
| Alcanar to Ochsenhausen | 698.77 mi (1,124.56 km) |
| Alcanar to Ochtrup | 866.05 mi (1,393.77 km) |
| Alcanar to Odenthal | 791.40 mi (1,273.64 km) |
| Alcanar to Oelde | 860.89 mi (1,385.47 km) |
| Alcanar to Oelsnitz | 884.35 mi (1,423.23 km) |
| Alcanar to Oer-Erkenschwick | 831.79 mi (1,338.64 km) |
