| Watford to Ross on Wye | 95.35 mi (153.45 km) |
| Watford to Rossington | 128.88 mi (207.41 km) |
| Watford to Rosyth | 326.82 mi (525.96 km) |
| Watford to Rotherham | 129.12 mi (207.80 km) |
| Watford to Rothwell | 151.57 mi (243.93 km) |
| Watford to Rottingdean | 59.78 mi (96.20 km) |
| Watford to Rowley Regis | 90.82 mi (146.16 km) |
| Watford to Royal Leamington Spa | 65.55 mi (105.49 km) |
| Watford to Royal Tunbridge Wells | 45.96 mi (73.96 km) |
| Watford to Royal Wootton Bassett | 65.12 mi (104.79 km) |
| Watford to Royston | 142.12 mi (228.73 km) |
| Watford to Royston | 31.48 mi (50.66 km) |
| Watford to Royton | 150.57 mi (242.31 km) |
| Watford to Rugby | 61.57 mi (99.09 km) |
| Watford to Rugeley | 100.48 mi (161.70 km) |
