| Llantwit Major to Romeoville (Illinois) | 3,851.41 mi (6,198.24 km) |
| Llantwit Major to Romulus (Michigan) | 3,639.53 mi (5,857.25 km) |
| Llantwit Major to Ronkonkoma (New York) | 3,285.36 mi (5,287.28 km) |
| Llantwit Major to Roosevelt (New York) | 3,309.62 mi (5,326.33 km) |
| Llantwit Major to Rosamond (California) | 5,289.09 mi (8,511.96 km) |
| Llantwit Major to Rosaryville (Maryland) | 3,526.71 mi (5,675.69 km) |
| Llantwit Major to Roscoe (Illinois) | 3,850.33 mi (6,196.50 km) |
| Llantwit Major to Rose Hill (Virginia) | 3,537.49 mi (5,693.04 km) |
| Llantwit Major to Roseburg (Oregon) | 4,975.49 mi (8,007.28 km) |
| Llantwit Major to Rosedale (California) | 5,292.13 mi (8,516.86 km) |
| Llantwit Major to Rosedale (Maryland) | 3,488.93 mi (5,614.88 km) |
| Llantwit Major to Roselle (Illinois) | 3,835.00 mi (6,171.83 km) |
| Llantwit Major to Roselle (New Jersey) | 3,338.75 mi (5,373.20 km) |
| Llantwit Major to Roselle Park (New Jersey) | 3,338.49 mi (5,372.79 km) |
| Llantwit Major to Rosemead (California) | 5,329.44 mi (8,576.90 km) |
