| Milford Haven to Nottingham | 185.28 mi (298.18 km) |
| Milford Haven to Nuneaton | 161.60 mi (260.08 km) |
| Milford Haven to Oadby | 178.87 mi (287.86 km) |
| Milford Haven to Oakengates | 128.97 mi (207.55 km) |
| Milford Haven to Oakham | 194.08 mi (312.34 km) |
| Milford Haven to Oldbury | 139.56 mi (224.61 km) |
| Milford Haven to Oldham | 176.17 mi (283.52 km) |
| Milford Haven to Ollerton | 198.01 mi (318.66 km) |
| Milford Haven to Olton | 146.25 mi (235.37 km) |
| Milford Haven to Omagh | 219.41 mi (353.10 km) |
| Milford Haven to Ormesby | 252.88 mi (406.97 km) |
| Milford Haven to Ormskirk | 156.67 mi (252.13 km) |
| Milford Haven to Orpington | 222.12 mi (357.47 km) |
| Milford Haven to Ossett | 198.63 mi (319.66 km) |
| Milford Haven to Oswaldtwistle | 178.70 mi (287.58 km) |
