| Belfast to Ifield | 338.28 mi (544.41 km) |
| Belfast to Ilford | 326.05 mi (524.72 km) |
| Belfast to Ilfracombe | 245.95 mi (395.81 km) |
| Belfast to Ilkeston | 219.48 mi (353.21 km) |
| Belfast to Ilkley | 172.13 mi (277.01 km) |
| Belfast to Immingham | 241.05 mi (387.93 km) |
| Belfast to Ince-in-Makerfield | 153.49 mi (247.02 km) |
| Belfast to Inverness | 209.67 mi (337.43 km) |
| Belfast to Inverurie | 230.70 mi (371.28 km) |
| Belfast to Ipswich | 340.67 mi (548.26 km) |
| Belfast to Irlam | 163.09 mi (262.46 km) |
| Belfast to Irthlingborough | 269.09 mi (433.06 km) |
| Belfast to Irvine | 86.70 mi (139.52 km) |
| Belfast to Islington | 320.75 mi (516.20 km) |
| Belfast to Iver | 309.45 mi (498.02 km) |
