| Rhondda to Romeoville (Illinois) | 3,847.34 mi (6,191.70 km) |
| Rhondda to Romulus (Michigan) | 3,636.02 mi (5,851.61 km) |
| Rhondda to Ronkonkoma (New York) | 3,283.80 mi (5,284.76 km) |
| Rhondda to Roosevelt (New York) | 3,308.02 mi (5,323.74 km) |
| Rhondda to Rosamond (California) | 5,281.67 mi (8,500.03 km) |
| Rhondda to Rosaryville (Maryland) | 3,525.07 mi (5,673.06 km) |
| Rhondda to Roscoe (Illinois) | 3,845.95 mi (6,189.46 km) |
| Rhondda to Rose Hill (Virginia) | 3,535.80 mi (5,690.33 km) |
| Rhondda to Roseburg (Oregon) | 4,966.30 mi (7,992.49 km) |
| Rhondda to Rosedale (California) | 5,284.49 mi (8,504.57 km) |
| Rhondda to Rosedale (Maryland) | 3,487.20 mi (5,612.11 km) |
| Rhondda to Roselle (Illinois) | 3,830.85 mi (6,165.16 km) |
| Rhondda to Roselle (New Jersey) | 3,337.04 mi (5,370.45 km) |
| Rhondda to Roselle Park (New Jersey) | 3,336.78 mi (5,370.03 km) |
| Rhondda to Rosemead (California) | 5,322.15 mi (8,565.17 km) |
