| Olesa de Montserrat to Oerlinghausen | 787.37 mi (1,267.16 km) |
| Olesa de Montserrat to Oestrich-Winkel | 653.57 mi (1,051.82 km) |
| Olesa de Montserrat to Offenburg | 561.50 mi (903.65 km) |
| Olesa de Montserrat to Oftersheim | 629.88 mi (1,013.70 km) |
| Olesa de Montserrat to Ohrdruf | 767.00 mi (1,234.36 km) |
| Olesa de Montserrat to Ohringen | 644.28 mi (1,036.86 km) |
| Olesa de Montserrat to Olbernhau | 833.23 mi (1,340.96 km) |
| Olesa de Montserrat to Olching | 650.46 mi (1,046.81 km) |
| Olesa de Montserrat to Oldenburg | 853.45 mi (1,373.50 km) |
| Olesa de Montserrat to Oldenburg in Holstein | 972.80 mi (1,565.57 km) |
| Olesa de Montserrat to Olfen | 748.96 mi (1,205.33 km) |
| Olesa de Montserrat to Olpe | 712.66 mi (1,146.91 km) |
| Olesa de Montserrat to Olsberg | 745.82 mi (1,200.28 km) |
| Olesa de Montserrat to Oranienburg | 937.73 mi (1,509.13 km) |
| Olesa de Montserrat to Ortenberg | 698.48 mi (1,124.10 km) |
