| Llantwit Major to Red Bank (New Jersey) | 3,343.74 mi (5,381.24 km) |
| Llantwit Major to Red Bank (Tennessee) | 4,043.61 mi (6,507.57 km) |
| Llantwit Major to Red Bluff (California) | 5,116.23 mi (8,233.78 km) |
| Llantwit Major to Red Hill (South Carolina) | 3,846.00 mi (6,189.54 km) |
| Llantwit Major to Red Oak (Texas) | 4,633.22 mi (7,456.45 km) |
| Llantwit Major to Red Wing (Minnesota) | 3,887.43 mi (6,256.22 km) |
| Llantwit Major to Redan (Georgia) | 4,062.67 mi (6,538.24 km) |
| Llantwit Major to Redding (California) | 5,097.41 mi (8,203.50 km) |
| Llantwit Major to Redland (Maryland) | 3,523.75 mi (5,670.92 km) |
| Llantwit Major to Redlands (California) | 5,299.96 mi (8,529.45 km) |
| Llantwit Major to Redmond (Oregon) | 4,854.34 mi (7,812.31 km) |
| Llantwit Major to Redmond (Washington) | 4,690.07 mi (7,547.94 km) |
| Llantwit Major to Redondo Beach (California) | 5,351.11 mi (8,611.78 km) |
| Llantwit Major to Redwood City (California) | 5,267.91 mi (8,477.89 km) |
| Llantwit Major to Reedley (California) | 5,231.70 mi (8,419.61 km) |
