| Holyhead to Hoyo de Manzanares | 876.51 mi (1,410.60 km) |
| Holyhead to Huelva | 1,115.12 mi (1,794.61 km) |
| Holyhead to Huercal de Almeria | 1,139.83 mi (1,834.37 km) |
| Holyhead to Huercal-Overa | 1,107.94 mi (1,783.05 km) |
| Holyhead to Huesca | 796.29 mi (1,281.50 km) |
| Holyhead to Huetor Vega | 1,117.65 mi (1,798.69 km) |
| Holyhead to Huetor-Tajar | 1,113.75 mi (1,792.40 km) |
| Holyhead to Humanes de Madrid | 902.81 mi (1,452.93 km) |
| Holyhead to Ibi | 1,032.53 mi (1,661.70 km) |
| Holyhead to Ibiza | 1,035.58 mi (1,666.60 km) |
| Holyhead to Icod de los Vinos | 1,830.47 mi (2,945.86 km) |
| Holyhead to Igualada | 860.56 mi (1,384.94 km) |
| Holyhead to Illescas | 912.27 mi (1,468.16 km) |
| Holyhead to Inca | 1,004.05 mi (1,615.87 km) |
| Holyhead to Ingenio | 1,838.56 mi (2,958.87 km) |
