| Grimmen to Oria | 964.14 mi (1,551.63 km) |
| Grimmen to Oristano | 1,003.05 mi (1,614.25 km) |
| Grimmen to Orta Nova | 891.47 mi (1,434.68 km) |
| Grimmen to Orte | 805.47 mi (1,296.28 km) |
| Grimmen to Ortona | 814.90 mi (1,311.45 km) |
| Grimmen to Orvieto | 788.23 mi (1,268.53 km) |
| Grimmen to Orzinuovi | 617.43 mi (993.66 km) |
| Grimmen to Osimo | 734.51 mi (1,182.07 km) |
| Grimmen to Ospitaletto | 605.55 mi (974.54 km) |
| Grimmen to Ostuni | 947.82 mi (1,525.36 km) |
| Grimmen to Ottaviano | 918.58 mi (1,478.31 km) |
| Grimmen to Ovada | 683.25 mi (1,099.58 km) |
| Grimmen to Ozieri | 953.02 mi (1,533.74 km) |
| Grimmen to Paceco | 1,114.49 mi (1,793.60 km) |
| Grimmen to Pachino | 1,205.77 mi (1,940.50 km) |
