| Cities | Distance |
|---|---|
| Holyhead to Nottingham | 146.45 mi (235.69 km) |
| Holyhead to Nuneaton | 142.59 mi (229.48 km) |
| Holyhead to Oadby | 155.95 mi (250.98 km) |
| Holyhead to Oakengates | 100.15 mi (161.17 km) |
| Holyhead to Oakham | 168.06 mi (270.47 km) |
| Holyhead to Oldbury | 122.38 mi (196.95 km) |
| Holyhead to Oldham | 104.85 mi (168.74 km) |
| Holyhead to Ollerton | 149.52 mi (240.63 km) |
| Holyhead to Olton | 132.37 mi (213.03 km) |
| Holyhead to Omagh | 139.65 mi (224.74 km) |
| Holyhead to Ormesby | 164.46 mi (264.67 km) |
| Holyhead to Ormskirk | 74.03 mi (119.15 km) |
| Holyhead to Orpington | 240.27 mi (386.68 km) |
| Holyhead to Ossett | 128.07 mi (206.11 km) |
| Holyhead to Oswaldtwistle | 96.76 mi (155.72 km) |