| Marion to Orbetello | 4,884.81 mi (7,861.34 km) |
| Marion to Oria | 5,221.91 mi (8,403.86 km) |
| Marion to Oristano | 4,891.28 mi (7,871.76 km) |
| Marion to Orta Nova | 5,109.40 mi (8,222.78 km) |
| Marion to Orte | 4,929.59 mi (7,933.40 km) |
| Marion to Ortona | 5,012.11 mi (8,066.21 km) |
| Marion to Orvieto | 4,907.35 mi (7,897.62 km) |
| Marion to Orzinuovi | 4,706.33 mi (7,574.11 km) |
| Marion to Osimo | 4,925.65 mi (7,927.06 km) |
| Marion to Ospitaletto | 4,704.99 mi (7,571.95 km) |
| Marion to Ostuni | 5,208.90 mi (8,382.92 km) |
| Marion to Ottaviano | 5,084.10 mi (8,182.07 km) |
| Marion to Ovada | 4,689.35 mi (7,546.79 km) |
| Marion to Ozieri | 4,878.38 mi (7,850.99 km) |
| Marion to Paceco | 5,139.29 mi (8,270.89 km) |
