| Gross-Zimmern to Oria | 775.32 mi (1,247.76 km) |
| Gross-Zimmern to Oristano | 688.74 mi (1,108.42 km) |
| Gross-Zimmern to Orta Nova | 676.70 mi (1,089.04 km) |
| Gross-Zimmern to Orte | 539.44 mi (868.15 km) |
| Gross-Zimmern to Ortona | 583.75 mi (939.45 km) |
| Gross-Zimmern to Orvieto | 518.33 mi (834.17 km) |
| Gross-Zimmern to Orzinuovi | 313.22 mi (504.09 km) |
| Gross-Zimmern to Osimo | 493.17 mi (793.69 km) |
| Gross-Zimmern to Ospitaletto | 303.79 mi (488.91 km) |
| Gross-Zimmern to Ostuni | 760.12 mi (1,223.30 km) |
| Gross-Zimmern to Ottaviano | 680.46 mi (1,095.09 km) |
| Gross-Zimmern to Ovada | 361.70 mi (582.10 km) |
| Gross-Zimmern to Ozieri | 641.77 mi (1,032.83 km) |
| Gross-Zimmern to Paceco | 841.74 mi (1,354.65 km) |
| Gross-Zimmern to Pachino | 961.19 mi (1,546.89 km) |
