| Holyhead to Hutchinson (Minnesota) | 3,828.14 mi (6,160.80 km) |
| Holyhead to Hutto (Texas) | 4,669.63 mi (7,515.04 km) |
| Holyhead to Hyattsville (Maryland) | 3,441.68 mi (5,538.85 km) |
| Holyhead to Hybla Valley (Virginia) | 3,456.60 mi (5,562.87 km) |
| Holyhead to Idaho Falls (Idaho) | 4,492.97 mi (7,230.74 km) |
| Holyhead to Idylwood (Virginia) | 3,455.03 mi (5,560.33 km) |
| Holyhead to Ilchester (Maryland) | 3,422.38 mi (5,507.79 km) |
| Holyhead to Immokalee (Florida) | 4,240.43 mi (6,824.32 km) |
| Holyhead to Imperial (California) | 5,195.88 mi (8,361.96 km) |
| Holyhead to Imperial Beach (California) | 5,262.65 mi (8,469.41 km) |
| Holyhead to Independence (Kentucky) | 3,742.42 mi (6,022.84 km) |
| Holyhead to Independence (Missouri) | 4,109.53 mi (6,613.65 km) |
| Holyhead to Indian Trail (North Carolina) | 3,774.16 mi (6,073.92 km) |
| Holyhead to Indiana (Pennsylvania) | 3,453.07 mi (5,557.17 km) |
| Holyhead to Indianapolis (Indiana) | 3,765.06 mi (6,059.28 km) |
