| Guardamar del Segura to Oerlinghausen | 1,059.35 mi (1,704.86 km) |
| Guardamar del Segura to Oestrich-Winkel | 926.96 mi (1,491.80 km) |
| Guardamar del Segura to Offenburg | 835.86 mi (1,345.18 km) |
| Guardamar del Segura to Oftersheim | 904.17 mi (1,455.12 km) |
| Guardamar del Segura to Ohrdruf | 1,041.37 mi (1,675.93 km) |
| Guardamar del Segura to Ohringen | 918.55 mi (1,478.26 km) |
| Guardamar del Segura to Olbernhau | 1,106.22 mi (1,780.29 km) |
| Guardamar del Segura to Olching | 920.95 mi (1,482.13 km) |
| Guardamar del Segura to Oldenburg | 1,122.96 mi (1,807.23 km) |
| Guardamar del Segura to Oldenburg in Holstein | 1,244.89 mi (2,003.45 km) |
| Guardamar del Segura to Olfen | 1,018.92 mi (1,639.79 km) |
| Guardamar del Segura to Olpe | 984.56 mi (1,584.49 km) |
| Guardamar del Segura to Olsberg | 1,018.30 mi (1,638.79 km) |
| Guardamar del Segura to Oranienburg | 1,212.10 mi (1,950.69 km) |
| Guardamar del Segura to Ortenberg | 972.50 mi (1,565.09 km) |
