| Alcaniz to Oerlinghausen | 861.08 mi (1,385.77 km) |
| Alcaniz to Oestrich-Winkel | 732.04 mi (1,178.11 km) |
| Alcaniz to Offenburg | 646.66 mi (1,040.69 km) |
| Alcaniz to Oftersheim | 713.48 mi (1,148.24 km) |
| Alcaniz to Ohrdruf | 851.90 mi (1,371.00 km) |
| Alcaniz to Ohringen | 731.98 mi (1,178.01 km) |
| Alcaniz to Olbernhau | 925.30 mi (1,489.12 km) |
| Alcaniz to Olching | 747.58 mi (1,203.12 km) |
| Alcaniz to Oldenburg | 921.71 mi (1,483.36 km) |
| Alcaniz to Oldenburg in Holstein | 1,046.33 mi (1,683.90 km) |
| Alcaniz to Olfen | 818.36 mi (1,317.03 km) |
| Alcaniz to Olpe | 786.43 mi (1,265.63 km) |
| Alcaniz to Olsberg | 821.00 mi (1,321.27 km) |
| Alcaniz to Oranienburg | 1,022.33 mi (1,645.27 km) |
| Alcaniz to Ortenberg | 779.68 mi (1,254.77 km) |
