| Cobh to Joliet (Illinois) | 3,657.25 mi (5,885.78 km) |
| Cobh to Jonesboro (Arkansas) | 4,022.67 mi (6,473.87 km) |
| Cobh to Joplin (Missouri) | 4,114.81 mi (6,622.15 km) |
| Cobh to Joppatowne (Maryland) | 3,270.66 mi (5,263.62 km) |
| Cobh to Juana Díaz (Puerto Rico) | 3,898.15 mi (6,273.47 km) |
| Cobh to Junction City (Kansas) | 4,112.12 mi (6,617.82 km) |
| Cobh to Juneau (Alaska) | 4,232.80 mi (6,812.04 km) |
| Cobh to Jupiter (Florida) | 4,016.73 mi (6,464.30 km) |
| Cobh to Jupiter Farms (Florida) | 4,021.14 mi (6,471.40 km) |
| Cobh to Jurupa Valley (California) | 5,129.63 mi (8,255.35 km) |
| Cobh to Justice (Illinois) | 3,634.52 mi (5,849.20 km) |
| Cobh to Kahului (Hawaii) | 7,056.65 mi (11,356.58 km) |
| Cobh to Kailua (Hawaii) | 7,049.65 mi (11,345.31 km) |
| Cobh to Kalamazoo (Michigan) | 3,522.56 mi (5,669.01 km) |
| Cobh to Kalispell (Montana) | 4,269.19 mi (6,870.60 km) |
