| Cedar Rapids to Orbetello | 4,891.99 mi (7,872.90 km) |
| Cedar Rapids to Oria | 5,229.12 mi (8,415.46 km) |
| Cedar Rapids to Oristano | 4,898.39 mi (7,883.20 km) |
| Cedar Rapids to Orta Nova | 5,116.60 mi (8,234.37 km) |
| Cedar Rapids to Orte | 4,936.78 mi (7,944.98 km) |
| Cedar Rapids to Ortona | 5,019.32 mi (8,077.81 km) |
| Cedar Rapids to Orvieto | 4,914.54 mi (7,909.19 km) |
| Cedar Rapids to Orzinuovi | 4,713.54 mi (7,585.71 km) |
| Cedar Rapids to Osimo | 4,932.86 mi (7,938.67 km) |
| Cedar Rapids to Ospitaletto | 4,712.20 mi (7,583.56 km) |
| Cedar Rapids to Ostuni | 5,216.11 mi (8,394.52 km) |
| Cedar Rapids to Ottaviano | 5,091.29 mi (8,193.64 km) |
| Cedar Rapids to Ovada | 4,696.55 mi (7,558.36 km) |
| Cedar Rapids to Ozieri | 4,885.50 mi (7,862.45 km) |
| Cedar Rapids to Paceco | 5,146.41 mi (8,282.35 km) |
