| Watertown Town to Ickenham | 3,261.25 mi (5,248.47 km) |
| Watertown Town to Ifield | 3,280.59 mi (5,279.59 km) |
| Watertown Town to Ilford | 3,283.05 mi (5,283.56 km) |
| Watertown Town to Ilfracombe | 3,117.10 mi (5,016.49 km) |
| Watertown Town to Ilkeston | 3,197.61 mi (5,146.05 km) |
| Watertown Town to Ilkley | 3,159.46 mi (5,084.65 km) |
| Watertown Town to Immingham | 3,228.32 mi (5,195.48 km) |
| Watertown Town to Ince-in-Makerfield | 3,135.67 mi (5,046.37 km) |
| Watertown Town to Inverness | 3,014.97 mi (4,852.13 km) |
| Watertown Town to Inverurie | 3,085.02 mi (4,964.86 km) |
| Watertown Town to Ipswich | 3,315.36 mi (5,335.55 km) |
| Watertown Town to Irlam | 3,144.40 mi (5,060.42 km) |
| Watertown Town to Irthlingborough | 3,238.42 mi (5,211.74 km) |
| Watertown Town to Irvine | 3,022.41 mi (4,864.10 km) |
| Watertown Town to Islington | 3,275.66 mi (5,271.66 km) |
