| Rhondda to Yonkers (New York) | 3,308.36 mi (5,324.29 km) |
| Rhondda to Yorba Linda (California) | 5,321.95 mi (8,564.85 km) |
| Rhondda to York (Pennsylvania) | 3,468.34 mi (5,581.75 km) |
| Rhondda to Yorktown (Indiana) | 3,812.48 mi (6,135.59 km) |
| Rhondda to Yorkville (Illinois) | 3,859.77 mi (6,211.70 km) |
| Rhondda to Youngstown (Ohio) | 3,577.45 mi (5,757.34 km) |
| Rhondda to Youngsville (Louisiana) | 4,561.65 mi (7,341.26 km) |
| Rhondda to Ypsilanti (Michigan) | 3,645.15 mi (5,866.30 km) |
| Rhondda to Yuba City (California) | 5,148.44 mi (8,285.62 km) |
| Rhondda to Yucaipa (California) | 5,289.50 mi (8,512.63 km) |
| Rhondda to Yucca Valley (California) | 5,263.61 mi (8,470.97 km) |
| Rhondda to Yukon (Oklahoma) | 4,515.06 mi (7,266.29 km) |
| Rhondda to Yulee (Florida) | 4,103.68 mi (6,604.24 km) |
| Rhondda to Yuma (Arizona) | 5,284.47 mi (8,504.53 km) |
| Rhondda to Zachary (Louisiana) | 4,499.07 mi (7,240.56 km) |
