| Markham to Ickenham | 3,948.96 mi (6,355.23 km) |
| Markham to Ifield | 3,972.03 mi (6,392.37 km) |
| Markham to Ilford | 3,969.35 mi (6,388.04 km) |
| Markham to Ilfracombe | 3,817.66 mi (6,143.93 km) |
| Markham to Ilkeston | 3,872.74 mi (6,232.58 km) |
| Markham to Ilkley | 3,825.37 mi (6,156.35 km) |
| Markham to Immingham | 3,893.72 mi (6,266.34 km) |
| Markham to Ince-in-Makerfield | 3,807.73 mi (6,127.95 km) |
| Markham to Inverness | 3,643.34 mi (5,863.38 km) |
| Markham to Inverurie | 3,712.23 mi (5,974.25 km) |
| Markham to Ipswich | 3,993.65 mi (6,427.16 km) |
| Markham to Irlam | 3,817.09 mi (6,143.02 km) |
| Markham to Irthlingborough | 3,918.67 mi (6,306.48 km) |
| Markham to Irvine | 3,674.92 mi (5,914.21 km) |
| Markham to Islington | 3,962.59 mi (6,377.18 km) |
