| Alcanar to Oerlinghausen | 879.56 mi (1,415.52 km) |
| Alcanar to Oestrich-Winkel | 747.86 mi (1,203.57 km) |
| Alcanar to Offenburg | 658.53 mi (1,059.80 km) |
| Alcanar to Oftersheim | 726.38 mi (1,169.00 km) |
| Alcanar to Ohrdruf | 864.18 mi (1,390.76 km) |
| Alcanar to Ohringen | 742.38 mi (1,194.75 km) |
| Alcanar to Olbernhau | 932.88 mi (1,501.32 km) |
| Alcanar to Olching | 751.16 mi (1,208.87 km) |
| Alcanar to Oldenburg | 942.91 mi (1,517.47 km) |
| Alcanar to Oldenburg in Holstein | 1,065.09 mi (1,714.10 km) |
| Alcanar to Olfen | 838.88 mi (1,350.05 km) |
| Alcanar to Olpe | 804.78 mi (1,295.16 km) |
| Alcanar to Olsberg | 838.68 mi (1,349.73 km) |
| Alcanar to Oranienburg | 1,034.92 mi (1,665.55 km) |
| Alcanar to Ortenberg | 794.06 mi (1,277.91 km) |
