| Carrigaline to Olympia Heights (Florida) | 4,082.48 mi (6,570.12 km) |
| Carrigaline to Omaha (Nebraska) | 3,972.61 mi (6,393.30 km) |
| Carrigaline to On Top of the World Designated Place (Florida) | 3,996.92 mi (6,432.42 km) |
| Carrigaline to Onalaska (Wisconsin) | 3,667.81 mi (5,902.78 km) |
| Carrigaline to Oneida (New York) | 3,085.62 mi (4,965.83 km) |
| Carrigaline to Oneonta (New York) | 3,086.41 mi (4,967.09 km) |
| Carrigaline to Ontario (California) | 5,130.37 mi (8,256.53 km) |
| Carrigaline to Ontario (Oregon) | 4,569.35 mi (7,353.65 km) |
| Carrigaline to Opa-locka (Florida) | 4,070.08 mi (6,550.16 km) |
| Carrigaline to Opelika (Alabama) | 3,953.62 mi (6,362.74 km) |
| Carrigaline to Opelousas (Louisiana) | 4,336.12 mi (6,978.32 km) |
| Carrigaline to Orange (California) | 5,150.80 mi (8,289.41 km) |
| Carrigaline to Orange (Texas) | 4,425.22 mi (7,121.71 km) |
| Carrigaline to Orange City (Florida) | 3,963.01 mi (6,377.85 km) |
| Carrigaline to Orangeburg (South Carolina) | 3,725.16 mi (5,995.07 km) |
