| Llanelli to Yonkers (New York) | 3,276.34 mi (5,272.77 km) |
| Llanelli to Yorba Linda (California) | 5,294.10 mi (8,520.03 km) |
| Llanelli to York (Pennsylvania) | 3,436.39 mi (5,530.33 km) |
| Llanelli to Yorktown (Indiana) | 3,781.16 mi (6,085.19 km) |
| Llanelli to Yorkville (Illinois) | 3,828.93 mi (6,162.07 km) |
| Llanelli to Youngstown (Ohio) | 3,545.86 mi (5,706.50 km) |
| Llanelli to Youngsville (Louisiana) | 4,529.85 mi (7,290.09 km) |
| Llanelli to Ypsilanti (Michigan) | 3,613.94 mi (5,816.08 km) |
| Llanelli to Yuba City (California) | 5,122.38 mi (8,243.67 km) |
| Llanelli to Yucaipa (California) | 5,261.54 mi (8,467.63 km) |
| Llanelli to Yucca Valley (California) | 5,235.55 mi (8,425.80 km) |
| Llanelli to Yukon (Oklahoma) | 4,484.36 mi (7,216.88 km) |
| Llanelli to Yulee (Florida) | 4,071.43 mi (6,552.33 km) |
| Llanelli to Yuma (Arizona) | 5,255.80 mi (8,458.39 km) |
| Llanelli to Zachary (Louisiana) | 4,467.26 mi (7,189.36 km) |
