| Fort Atkinson to Orbetello | 4,738.38 mi (7,625.68 km) |
| Fort Atkinson to Oria | 5,076.88 mi (8,170.45 km) |
| Fort Atkinson to Oristano | 4,742.61 mi (7,632.50 km) |
| Fort Atkinson to Orta Nova | 4,964.05 mi (7,988.87 km) |
| Fort Atkinson to Orte | 4,783.61 mi (7,698.47 km) |
| Fort Atkinson to Ortona | 4,866.86 mi (7,832.46 km) |
| Fort Atkinson to Orvieto | 4,761.43 mi (7,662.78 km) |
| Fort Atkinson to Orzinuovi | 4,561.34 mi (7,340.77 km) |
| Fort Atkinson to Osimo | 4,780.76 mi (7,693.89 km) |
| Fort Atkinson to Ospitaletto | 4,560.16 mi (7,338.87 km) |
| Fort Atkinson to Ostuni | 5,063.99 mi (8,149.71 km) |
| Fort Atkinson to Ottaviano | 4,937.97 mi (7,946.89 km) |
| Fort Atkinson to Ovada | 4,543.37 mi (7,311.85 km) |
| Fort Atkinson to Ozieri | 4,730.16 mi (7,612.46 km) |
| Fort Atkinson to Paceco | 4,990.94 mi (8,032.15 km) |
