| Porthcawl to Rockville (Maryland) | 3,516.01 mi (5,658.47 km) |
| Porthcawl to Rockville Centre (New York) | 3,302.23 mi (5,314.43 km) |
| Porthcawl to Rockwall (Texas) | 4,588.83 mi (7,385.01 km) |
| Porthcawl to Rocky Mount (North Carolina) | 3,683.29 mi (5,927.69 km) |
| Porthcawl to Rocky Point (New York) | 3,261.71 mi (5,249.22 km) |
| Porthcawl to Rocky River (Ohio) | 3,601.94 mi (5,796.76 km) |
| Porthcawl to Roessleville (New York) | 3,224.01 mi (5,188.54 km) |
| Porthcawl to Rogers (Arkansas) | 4,329.18 mi (6,967.14 km) |
| Porthcawl to Rogers (Minnesota) | 3,884.99 mi (6,252.28 km) |
| Porthcawl to Rohnert Park (California) | 5,223.90 mi (8,407.06 km) |
| Porthcawl to Rolla (Missouri) | 4,156.38 mi (6,689.04 km) |
| Porthcawl to Rolling Meadows (Illinois) | 3,817.82 mi (6,144.19 km) |
| Porthcawl to Roma (Texas) | 5,027.10 mi (8,090.34 km) |
| Porthcawl to Rome (Georgia) | 4,069.17 mi (6,548.70 km) |
| Porthcawl to Rome (New York) | 3,271.27 mi (5,264.61 km) |
