| Davenport to Orbetello | 4,867.99 mi (7,834.27 km) |
| Davenport to Oria | 5,206.93 mi (8,379.75 km) |
| Davenport to Oristano | 4,871.03 mi (7,839.17 km) |
| Davenport to Orta Nova | 5,094.02 mi (8,198.03 km) |
| Davenport to Orte | 4,913.38 mi (7,907.33 km) |
| Davenport to Ortona | 4,996.86 mi (8,041.67 km) |
| Davenport to Orvieto | 4,891.22 mi (7,871.66 km) |
| Davenport to Orzinuovi | 4,691.41 mi (7,550.10 km) |
| Davenport to Osimo | 4,910.85 mi (7,903.25 km) |
| Davenport to Ospitaletto | 4,690.27 mi (7,548.26 km) |
| Davenport to Ostuni | 5,194.07 mi (8,359.06 km) |
| Davenport to Ottaviano | 5,067.68 mi (8,155.65 km) |
| Davenport to Ovada | 4,673.15 mi (7,520.71 km) |
| Davenport to Ozieri | 4,858.90 mi (7,819.64 km) |
| Davenport to Paceco | 5,119.57 mi (8,239.16 km) |
