| Gardelegen to Oria | 881.52 mi (1,418.67 km) |
| Gardelegen to Oristano | 882.04 mi (1,419.51 km) |
| Gardelegen to Orta Nova | 799.56 mi (1,286.77 km) |
| Gardelegen to Orte | 697.03 mi (1,121.76 km) |
| Gardelegen to Ortona | 716.86 mi (1,153.68 km) |
| Gardelegen to Orvieto | 678.49 mi (1,091.92 km) |
| Gardelegen to Orzinuovi | 496.79 mi (799.50 km) |
| Gardelegen to Osimo | 632.18 mi (1,017.39 km) |
| Gardelegen to Ospitaletto | 485.33 mi (781.06 km) |
| Gardelegen to Ostuni | 865.36 mi (1,392.66 km) |
| Gardelegen to Ottaviano | 819.70 mi (1,319.19 km) |
| Gardelegen to Ovada | 559.11 mi (899.80 km) |
| Gardelegen to Ozieri | 832.73 mi (1,340.15 km) |
| Gardelegen to Paceco | 1,006.37 mi (1,619.60 km) |
| Gardelegen to Pachino | 1,107.08 mi (1,781.67 km) |
