| Ardea to Oswego (Illinois) | 4,860.98 mi (7,823.00 km) |
| Ardea to Oswego (New York) | 4,300.44 mi (6,920.89 km) |
| Ardea to Otsego (Minnesota) | 4,906.91 mi (7,896.91 km) |
| Ardea to Ottawa (Illinois) | 4,894.90 mi (7,877.57 km) |
| Ardea to Ottawa (Kansas) | 5,276.86 mi (8,492.28 km) |
| Ardea to Ottumwa (Iowa) | 5,052.81 mi (8,131.71 km) |
| Ardea to Overland (Missouri) | 5,075.24 mi (8,167.81 km) |
| Ardea to Overland Park (Kansas) | 5,240.56 mi (8,433.87 km) |
| Ardea to Overlea (Maryland) | 4,455.96 mi (7,171.17 km) |
| Ardea to Oviedo (Florida) | 5,112.44 mi (8,227.67 km) |
| Ardea to Owasso (Oklahoma) | 5,408.97 mi (8,704.90 km) |
| Ardea to Owatonna (Minnesota) | 4,945.28 mi (7,958.66 km) |
| Ardea to Owensboro (Kentucky) | 4,981.38 mi (8,016.76 km) |
| Ardea to Owings Mills (Maryland) | 4,466.23 mi (7,187.70 km) |
| Ardea to Owosso (Michigan) | 4,637.27 mi (7,462.97 km) |
