| Llantwit Major to Hutchinson (Minnesota) | 3,938.48 mi (6,338.37 km) |
| Llantwit Major to Hutto (Texas) | 4,764.64 mi (7,667.94 km) |
| Llantwit Major to Hyattsville (Maryland) | 3,523.44 mi (5,670.43 km) |
| Llantwit Major to Hybla Valley (Virginia) | 3,538.11 mi (5,694.04 km) |
| Llantwit Major to Idaho Falls (Idaho) | 4,615.97 mi (7,428.68 km) |
| Llantwit Major to Idylwood (Virginia) | 3,536.97 mi (5,692.21 km) |
| Llantwit Major to Ilchester (Maryland) | 3,504.40 mi (5,639.79 km) |
| Llantwit Major to Immokalee (Florida) | 4,306.27 mi (6,930.27 km) |
| Llantwit Major to Imperial (California) | 5,313.15 mi (8,550.69 km) |
| Llantwit Major to Imperial Beach (California) | 5,381.15 mi (8,660.12 km) |
| Llantwit Major to Independence (Kentucky) | 3,833.66 mi (6,169.68 km) |
| Llantwit Major to Independence (Missouri) | 4,212.03 mi (6,778.61 km) |
| Llantwit Major to Indian Trail (North Carolina) | 3,853.65 mi (6,201.85 km) |
| Llantwit Major to Indiana (Pennsylvania) | 3,540.79 mi (5,698.35 km) |
| Llantwit Major to Indianapolis (Indiana) | 3,859.53 mi (6,211.32 km) |
