| Mairena del Alcor to Oerlinghausen | 1,227.32 mi (1,975.18 km) |
| Mairena del Alcor to Oestrich-Winkel | 1,106.60 mi (1,780.90 km) |
| Mairena del Alcor to Offenburg | 1,029.55 mi (1,656.89 km) |
| Mairena del Alcor to Oftersheim | 1,094.00 mi (1,760.62 km) |
| Mairena del Alcor to Ohrdruf | 1,232.33 mi (1,983.25 km) |
| Mairena del Alcor to Ohringen | 1,116.36 mi (1,796.60 km) |
| Mairena del Alcor to Olbernhau | 1,312.48 mi (2,112.23 km) |
| Mairena del Alcor to Olching | 1,138.98 mi (1,833.01 km) |
| Mairena del Alcor to Oldenburg | 1,278.87 mi (2,058.14 km) |
| Mairena del Alcor to Oldenburg in Holstein | 1,409.56 mi (2,268.47 km) |
| Mairena del Alcor to Olfen | 1,179.34 mi (1,897.96 km) |
| Mairena del Alcor to Olpe | 1,154.10 mi (1,857.35 km) |
| Mairena del Alcor to Olsberg | 1,189.93 mi (1,915.01 km) |
| Mairena del Alcor to Oranienburg | 1,401.02 mi (2,254.72 km) |
| Mairena del Alcor to Ortenberg | 1,156.71 mi (1,861.54 km) |
