| Hertford to Ifield | 46.85 mi (75.40 km) |
| Hertford to Ilford | 17.94 mi (28.87 km) |
| Hertford to Ilfracombe | 178.54 mi (287.33 km) |
| Hertford to Ilkeston | 96.34 mi (155.04 km) |
| Hertford to Ilkley | 164.07 mi (264.04 km) |
| Hertford to Immingham | 125.70 mi (202.30 km) |
| Hertford to Ince-in-Makerfield | 160.22 mi (257.85 km) |
| Hertford to Inverness | 425.94 mi (685.48 km) |
| Hertford to Inverurie | 389.89 mi (627.47 km) |
| Hertford to Ipswich | 55.58 mi (89.45 km) |
| Hertford to Irlam | 150.46 mi (242.14 km) |
| Hertford to Irthlingborough | 42.98 mi (69.17 km) |
| Hertford to Irvine | 323.78 mi (521.08 km) |
| Hertford to Islington | 17.49 mi (28.14 km) |
| Hertford to Iver | 26.49 mi (42.63 km) |
