| Marshall to Orbetello | 5,437.39 mi (8,750.64 km) |
| Marshall to Oria | 5,784.78 mi (9,309.70 km) |
| Marshall to Oristano | 5,420.50 mi (8,723.44 km) |
| Marshall to Orta Nova | 5,670.23 mi (9,125.36 km) |
| Marshall to Orte | 5,485.92 mi (8,828.74 km) |
| Marshall to Ortona | 5,574.10 mi (8,970.64 km) |
| Marshall to Orvieto | 5,464.25 mi (8,793.85 km) |
| Marshall to Orzinuovi | 5,271.56 mi (8,483.76 km) |
| Marshall to Osimo | 5,490.77 mi (8,836.54 km) |
| Marshall to Ospitaletto | 5,271.45 mi (8,483.58 km) |
| Marshall to Ostuni | 5,772.76 mi (9,290.36 km) |
| Marshall to Ottaviano | 5,638.43 mi (9,074.17 km) |
| Marshall to Ovada | 5,246.72 mi (8,443.79 km) |
| Marshall to Ozieri | 5,413.09 mi (8,711.53 km) |
| Marshall to Paceco | 5,671.04 mi (9,126.66 km) |
