| Middlesbrough to Ickenham | 211.11 mi (339.75 km) |
| Middlesbrough to Ifield | 242.42 mi (390.14 km) |
| Middlesbrough to Ilford | 215.69 mi (347.12 km) |
| Middlesbrough to Ilfracombe | 261.92 mi (421.53 km) |
| Middlesbrough to Ilkeston | 110.98 mi (178.61 km) |
| Middlesbrough to Ilkley | 50.87 mi (81.87 km) |
| Middlesbrough to Immingham | 78.25 mi (125.94 km) |
| Middlesbrough to Ince-in-Makerfield | 90.48 mi (145.61 km) |
| Middlesbrough to Inverness | 231.25 mi (372.15 km) |
| Middlesbrough to Inverurie | 191.95 mi (308.92 km) |
| Middlesbrough to Ipswich | 199.95 mi (321.79 km) |
| Middlesbrough to Irlam | 91.84 mi (147.80 km) |
| Middlesbrough to Irthlingborough | 157.73 mi (253.84 km) |
| Middlesbrough to Irvine | 153.40 mi (246.88 km) |
| Middlesbrough to Islington | 214.75 mi (345.60 km) |
