| Cities | Distance |
|---|---|
| Watford to Norwich | 98.24 mi (158.10 km) |
| Watford to Nottingham | 95.19 mi (153.20 km) |
| Watford to Nuneaton | 75.29 mi (121.17 km) |
| Watford to Oadby | 71.31 mi (114.76 km) |
| Watford to Oakengates | 112.90 mi (181.69 km) |
| Watford to Oakham | 71.61 mi (115.24 km) |
| Watford to Oldbury | 90.45 mi (145.57 km) |
| Watford to Oldham | 149.19 mi (240.09 km) |
| Watford to Ollerton | 109.94 mi (176.93 km) |
| Watford to Olton | 80.71 mi (129.90 km) |
| Watford to Omagh | 350.23 mi (563.65 km) |
| Watford to Ormesby | 202.61 mi (326.06 km) |
| Watford to Ormskirk | 168.40 mi (271.02 km) |
| Watford to Orpington | 28.78 mi (46.32 km) |
| Watford to Ossett | 148.45 mi (238.90 km) |