| Killarney to Oakley (California) | 5,001.95 mi (8,049.86 km) |
| Killarney to Oakton (Virginia) | 3,279.80 mi (5,278.32 km) |
| Killarney to Oakville (Missouri) | 3,830.56 mi (6,164.69 km) |
| Killarney to Oatfield (Oregon) | 4,622.06 mi (7,438.48 km) |
| Killarney to Ocala (Florida) | 3,938.39 mi (6,338.22 km) |
| Killarney to Ocean Acres (New Jersey) | 3,117.01 mi (5,016.34 km) |
| Killarney to Ocean City (New Jersey) | 3,150.84 mi (5,070.79 km) |
| Killarney to Ocean Pines (Maryland) | 3,212.14 mi (5,169.44 km) |
| Killarney to Ocean Pointe (Hawaii) | 7,022.96 mi (11,302.37 km) |
| Killarney to Ocean Springs (Mississippi) | 4,155.54 mi (6,687.70 km) |
| Killarney to Oceanside (California) | 5,116.04 mi (8,233.48 km) |
| Killarney to Oceanside (New York) | 3,052.43 mi (4,912.42 km) |
| Killarney to Ocoee (Florida) | 3,941.87 mi (6,343.83 km) |
| Killarney to Oconomowoc (Wisconsin) | 3,547.68 mi (5,709.44 km) |
| Killarney to Odenton (Maryland) | 3,246.77 mi (5,225.17 km) |
