| Cedar Falls to Orbetello | 4,897.31 mi (7,881.46 km) |
| Cedar Falls to Oria | 5,232.65 mi (8,421.14 km) |
| Cedar Falls to Oristano | 4,906.95 mi (7,896.97 km) |
| Cedar Falls to Orta Nova | 5,120.52 mi (8,240.69 km) |
| Cedar Falls to Orte | 4,941.52 mi (7,952.60 km) |
| Cedar Falls to Ortona | 5,023.15 mi (8,083.98 km) |
| Cedar Falls to Orvieto | 4,919.22 mi (7,916.72 km) |
| Cedar Falls to Orzinuovi | 4,717.13 mi (7,591.49 km) |
| Cedar Falls to Osimo | 4,936.29 mi (7,944.18 km) |
| Cedar Falls to Ospitaletto | 4,715.60 mi (7,589.03 km) |
| Cedar Falls to Ostuni | 5,219.50 mi (8,399.98 km) |
| Cedar Falls to Ottaviano | 5,096.19 mi (8,201.53 km) |
| Cedar Falls to Ovada | 4,701.33 mi (7,566.07 km) |
| Cedar Falls to Ozieri | 4,893.33 mi (7,875.06 km) |
| Cedar Falls to Paceco | 5,154.42 mi (8,295.23 km) |
