| Penarth to Yonkers (New York) | 3,322.21 mi (5,346.58 km) |
| Penarth to Yorba Linda (California) | 5,338.31 mi (8,591.18 km) |
| Penarth to York (Pennsylvania) | 3,482.32 mi (5,604.24 km) |
| Penarth to Yorktown (Indiana) | 3,827.29 mi (6,159.42 km) |
| Penarth to Yorkville (Illinois) | 3,874.97 mi (6,236.17 km) |
| Penarth to Youngstown (Ohio) | 3,591.96 mi (5,780.70 km) |
| Penarth to Youngsville (Louisiana) | 4,575.88 mi (7,364.17 km) |
| Penarth to Ypsilanti (Michigan) | 3,660.06 mi (5,890.29 km) |
| Penarth to Yuba City (California) | 5,165.05 mi (8,312.34 km) |
| Penarth to Yucaipa (California) | 5,305.84 mi (8,538.93 km) |
| Penarth to Yucca Valley (California) | 5,279.93 mi (8,497.23 km) |
| Penarth to Yukon (Oklahoma) | 4,530.36 mi (7,290.91 km) |
| Penarth to Yulee (Florida) | 4,116.77 mi (6,625.31 km) |
| Penarth to Yuma (Arizona) | 5,300.64 mi (8,530.56 km) |
| Penarth to Zachary (Louisiana) | 4,513.28 mi (7,263.42 km) |
