| Llantwit Major to Yonkers (New York) | 3,310.08 mi (5,327.06 km) |
| Llantwit Major to Yorba Linda (California) | 5,329.17 mi (8,576.46 km) |
| Llantwit Major to York (Pennsylvania) | 3,470.26 mi (5,584.85 km) |
| Llantwit Major to Yorktown (Indiana) | 3,815.83 mi (6,140.99 km) |
| Llantwit Major to Yorkville (Illinois) | 3,863.90 mi (6,218.34 km) |
| Llantwit Major to Youngstown (Ohio) | 3,580.27 mi (5,761.88 km) |
| Llantwit Major to Youngsville (Louisiana) | 4,563.98 mi (7,345.02 km) |
| Llantwit Major to Ypsilanti (Michigan) | 3,648.70 mi (5,872.01 km) |
| Llantwit Major to Yuba City (California) | 5,156.90 mi (8,299.24 km) |
| Llantwit Major to Yucaipa (California) | 5,296.63 mi (8,524.10 km) |
| Llantwit Major to Yucca Valley (California) | 5,270.66 mi (8,482.30 km) |
| Llantwit Major to Yukon (Oklahoma) | 4,519.38 mi (7,273.25 km) |
| Llantwit Major to Yulee (Florida) | 4,104.27 mi (6,605.18 km) |
| Llantwit Major to Yuma (Arizona) | 5,291.00 mi (8,515.05 km) |
| Llantwit Major to Zachary (Louisiana) | 4,501.37 mi (7,244.26 km) |
