| Llantwit Major to Port Chester (New York) | 3,299.38 mi (5,309.84 km) |
| Llantwit Major to Port Hueneme (California) | 5,361.31 mi (8,628.20 km) |
| Llantwit Major to Port Huron (Michigan) | 3,569.89 mi (5,745.19 km) |
| Llantwit Major to Port Lavaca (Texas) | 4,827.18 mi (7,768.59 km) |
| Llantwit Major to Port Neches (Texas) | 4,649.25 mi (7,482.25 km) |
| Llantwit Major to Port Orange (Florida) | 4,155.57 mi (6,687.74 km) |
| Llantwit Major to Port Orchard (Washington) | 4,713.93 mi (7,586.34 km) |
| Llantwit Major to Port Royal (South Carolina) | 3,984.68 mi (6,412.73 km) |
| Llantwit Major to Port Salerno (Florida) | 4,217.59 mi (6,787.56 km) |
| Llantwit Major to Port St. John (Florida) | 4,178.13 mi (6,724.04 km) |
| Llantwit Major to Port St. Lucie (Florida) | 4,219.44 mi (6,790.53 km) |
| Llantwit Major to Port Washington (New York) | 3,307.25 mi (5,322.50 km) |
| Llantwit Major to Port Washington (Wisconsin) | 3,764.03 mi (6,057.62 km) |
| Llantwit Major to Port Wentworth (Georgia) | 4,013.24 mi (6,458.68 km) |
| Llantwit Major to Portage (Indiana) | 3,817.72 mi (6,144.03 km) |
