| Llantrisant to Yonkers (New York) | 3,311.55 mi (5,329.42 km) |
| Llantrisant to Yorba Linda (California) | 5,326.58 mi (8,572.31 km) |
| Llantrisant to York (Pennsylvania) | 3,471.59 mi (5,586.98 km) |
| Llantrisant to Yorktown (Indiana) | 3,816.14 mi (6,141.49 km) |
| Llantrisant to Yorkville (Illinois) | 3,863.65 mi (6,217.94 km) |
| Llantrisant to Youngstown (Ohio) | 3,580.96 mi (5,763.00 km) |
| Llantrisant to Youngsville (Louisiana) | 4,565.02 mi (7,346.70 km) |
| Llantrisant to Ypsilanti (Michigan) | 3,648.87 mi (5,872.28 km) |
| Llantrisant to Yuba City (California) | 5,153.34 mi (8,293.50 km) |
| Llantrisant to Yucaipa (California) | 5,294.12 mi (8,520.06 km) |
| Llantrisant to Yucca Valley (California) | 5,268.21 mi (8,478.37 km) |
| Llantrisant to Yukon (Oklahoma) | 4,518.99 mi (7,272.62 km) |
| Llantrisant to Yulee (Florida) | 4,106.53 mi (6,608.81 km) |
| Llantrisant to Yuma (Arizona) | 5,288.95 mi (8,511.75 km) |
| Llantrisant to Zachary (Louisiana) | 4,502.44 mi (7,245.97 km) |
