| Cobh to Oswego (Illinois) | 3,657.27 mi (5,885.80 km) |
| Cobh to Oswego (New York) | 3,107.84 mi (5,001.59 km) |
| Cobh to Otsego (Minnesota) | 3,700.07 mi (5,954.69 km) |
| Cobh to Ottawa (Illinois) | 3,691.21 mi (5,940.43 km) |
| Cobh to Ottawa (Kansas) | 4,071.31 mi (6,552.14 km) |
| Cobh to Ottumwa (Iowa) | 3,846.89 mi (6,190.97 km) |
| Cobh to Overland (Missouri) | 3,874.19 mi (6,234.91 km) |
| Cobh to Overland Park (Kansas) | 4,035.13 mi (6,493.92 km) |
| Cobh to Overlea (Maryland) | 3,279.89 mi (5,278.48 km) |
| Cobh to Oviedo (Florida) | 3,976.09 mi (6,398.90 km) |
| Cobh to Owasso (Oklahoma) | 4,205.46 mi (6,768.03 km) |
| Cobh to Owatonna (Minnesota) | 3,738.02 mi (6,015.77 km) |
| Cobh to Owensboro (Kentucky) | 3,787.34 mi (6,095.14 km) |
| Cobh to Owings Mills (Maryland) | 3,289.22 mi (5,293.49 km) |
| Cobh to Owosso (Michigan) | 3,435.41 mi (5,528.76 km) |
