| Killarney to Yonkers (New York) | 3,048.88 mi (4,906.70 km) |
| Killarney to Yorba Linda (California) | 5,095.85 mi (8,200.97 km) |
| Killarney to York (Pennsylvania) | 3,209.36 mi (5,164.96 km) |
| Killarney to Yorktown (Indiana) | 3,558.60 mi (5,727.02 km) |
| Killarney to Yorkville (Illinois) | 3,609.82 mi (5,809.44 km) |
| Killarney to Youngstown (Ohio) | 3,321.38 mi (5,345.25 km) |
| Killarney to Youngsville (Louisiana) | 4,303.81 mi (6,926.31 km) |
| Killarney to Ypsilanti (Michigan) | 3,392.23 mi (5,459.26 km) |
| Killarney to Yuba City (California) | 4,936.88 mi (7,945.14 km) |
| Killarney to Yucaipa (California) | 5,062.46 mi (8,147.24 km) |
| Killarney to Yucca Valley (California) | 5,035.73 mi (8,104.23 km) |
| Killarney to Yukon (Oklahoma) | 4,266.08 mi (6,865.59 km) |
| Killarney to Yulee (Florida) | 3,842.31 mi (6,183.61 km) |
| Killarney to Yuma (Arizona) | 5,051.72 mi (8,129.96 km) |
| Killarney to Zachary (Louisiana) | 4,241.12 mi (6,825.42 km) |
