| San Martin de Valdeiglesias to Oerlinghausen | 1,013.47 mi (1,631.02 km) |
| San Martin de Valdeiglesias to Oestrich-Winkel | 896.56 mi (1,442.87 km) |
| San Martin de Valdeiglesias to Offenburg | 825.15 mi (1,327.95 km) |
| San Martin de Valdeiglesias to Oftersheim | 887.38 mi (1,428.10 km) |
| San Martin de Valdeiglesias to Ohrdruf | 1,024.84 mi (1,649.32 km) |
| San Martin de Valdeiglesias to Ohringen | 912.52 mi (1,468.56 km) |
| San Martin de Valdeiglesias to Olbernhau | 1,110.29 mi (1,786.84 km) |
| San Martin de Valdeiglesias to Olching | 944.51 mi (1,520.05 km) |
| San Martin de Valdeiglesias to Oldenburg | 1,062.56 mi (1,710.02 km) |
| San Martin de Valdeiglesias to Oldenburg in Holstein | 1,194.28 mi (1,922.00 km) |
| San Martin de Valdeiglesias to Olfen | 964.21 mi (1,551.75 km) |
| San Martin de Valdeiglesias to Olpe | 941.04 mi (1,514.45 km) |
| San Martin de Valdeiglesias to Olsberg | 977.13 mi (1,572.54 km) |
| San Martin de Valdeiglesias to Oranienburg | 1,191.73 mi (1,917.91 km) |
| San Martin de Valdeiglesias to Ortenberg | 947.61 mi (1,525.04 km) |
