| Cobh to Orangevale (California) | 4,996.58 mi (8,041.22 km) |
| Cobh to Orchards (Washington) | 4,651.27 mi (7,485.50 km) |
| Cobh to Orcutt (California) | 5,182.44 mi (8,340.34 km) |
| Cobh to Oregon (Ohio) | 3,463.60 mi (5,574.13 km) |
| Cobh to Oregon (Wisconsin) | 3,643.08 mi (5,862.97 km) |
| Cobh to Oregon City (Oregon) | 4,672.11 mi (7,519.04 km) |
| Cobh to Orem (Utah) | 4,591.82 mi (7,389.82 km) |
| Cobh to Orinda (California) | 5,072.31 mi (8,163.09 km) |
| Cobh to Orland Park (Illinois) | 3,641.93 mi (5,861.12 km) |
| Cobh to Orlando (Florida) | 3,991.37 mi (6,423.49 km) |
| Cobh to Ormond Beach (Florida) | 3,940.91 mi (6,342.29 km) |
| Cobh to Oro Valley (Arizona) | 4,982.43 mi (8,018.45 km) |
| Cobh to Oroville (California) | 4,962.56 mi (7,986.46 km) |
| Cobh to Oshkosh (Wisconsin) | 3,562.87 mi (5,733.88 km) |
| Cobh to Oskaloosa (Iowa) | 3,842.90 mi (6,184.55 km) |
