| Rhondda to Worthington (Ohio) | 3,717.38 mi (5,982.55 km) |
| Rhondda to Wright (Florida) | 4,324.59 mi (6,959.76 km) |
| Rhondda to Wyandanch (New York) | 3,295.95 mi (5,304.32 km) |
| Rhondda to Wyandotte (Michigan) | 3,628.29 mi (5,839.17 km) |
| Rhondda to Wylie (Texas) | 4,592.75 mi (7,391.32 km) |
| Rhondda to Wyndham (Virginia) | 3,605.71 mi (5,802.82 km) |
| Rhondda to Wyoming (Michigan) | 3,697.88 mi (5,951.16 km) |
| Rhondda to Wyomissing (Pennsylvania) | 3,421.16 mi (5,505.83 km) |
| Rhondda to Xenia (Ohio) | 3,772.88 mi (6,071.86 km) |
| Rhondda to Yakima (Washington) | 4,697.20 mi (7,559.42 km) |
| Rhondda to Yankton (South Dakota) | 4,136.65 mi (6,657.29 km) |
| Rhondda to Yauco (Puerto Rico) | 4,115.19 mi (6,622.75 km) |
| Rhondda to Yazoo City (Mississippi) | 4,358.49 mi (7,014.32 km) |
| Rhondda to Yeadon (Pennsylvania) | 3,408.98 mi (5,486.22 km) |
| Rhondda to Yelm (Washington) | 4,735.72 mi (7,621.40 km) |
