| Gnarrenburg to Oria | 977.31 mi (1,572.83 km) |
| Gnarrenburg to Oristano | 931.62 mi (1,499.30 km) |
| Gnarrenburg to Orta Nova | 889.18 mi (1,430.99 km) |
| Gnarrenburg to Orte | 770.75 mi (1,240.41 km) |
| Gnarrenburg to Ortona | 801.92 mi (1,290.56 km) |
| Gnarrenburg to Orvieto | 750.73 mi (1,208.18 km) |
| Gnarrenburg to Orzinuovi | 553.37 mi (890.56 km) |
| Gnarrenburg to Osimo | 714.01 mi (1,149.09 km) |
| Gnarrenburg to Ospitaletto | 543.18 mi (874.17 km) |
| Gnarrenburg to Ostuni | 961.35 mi (1,547.15 km) |
| Gnarrenburg to Ottaviano | 902.92 mi (1,453.11 km) |
| Gnarrenburg to Ovada | 604.59 mi (972.99 km) |
| Gnarrenburg to Ozieri | 884.50 mi (1,423.46 km) |
| Gnarrenburg to Paceco | 1,077.58 mi (1,734.19 km) |
| Gnarrenburg to Pachino | 1,188.49 mi (1,912.69 km) |
