| Penarth to Reidsville (North Carolina) | 3,766.58 mi (6,061.72 km) |
| Penarth to Reisterstown (Maryland) | 3,508.02 mi (5,645.61 km) |
| Penarth to Rendon (Texas) | 4,659.22 mi (7,498.28 km) |
| Penarth to Reno (Nevada) | 5,086.69 mi (8,186.24 km) |
| Penarth to Renton (Washington) | 4,710.29 mi (7,580.47 km) |
| Penarth to Republic (Missouri) | 4,282.64 mi (6,892.25 km) |
| Penarth to Reston (Virginia) | 3,552.23 mi (5,716.77 km) |
| Penarth to Revere (Massachusetts) | 3,142.99 mi (5,058.15 km) |
| Penarth to Rexburg (Idaho) | 4,599.09 mi (7,401.52 km) |
| Penarth to Reynoldsburg (Ohio) | 3,729.01 mi (6,001.26 km) |
| Penarth to Rialto (California) | 5,312.73 mi (8,550.01 km) |
| Penarth to Richardson (Texas) | 4,618.59 mi (7,432.90 km) |
| Penarth to Richfield (Minnesota) | 3,909.24 mi (6,291.32 km) |
| Penarth to Richfield (Wisconsin) | 3,795.16 mi (6,107.72 km) |
| Penarth to Richland (Washington) | 4,695.13 mi (7,556.08 km) |
