| Mexborough to Ickenham | 138.63 mi (223.11 km) |
| Mexborough to Ifield | 170.32 mi (274.10 km) |
| Mexborough to Ilford | 145.97 mi (234.91 km) |
| Mexborough to Ilfracombe | 198.45 mi (319.37 km) |
| Mexborough to Ilkeston | 36.51 mi (58.76 km) |
| Mexborough to Ilkley | 36.76 mi (59.16 km) |
| Mexborough to Immingham | 44.41 mi (71.47 km) |
| Mexborough to Ince-in-Makerfield | 54.13 mi (87.12 km) |
| Mexborough to Inverness | 297.97 mi (479.54 km) |
| Mexborough to Inverurie | 264.74 mi (426.06 km) |
| Mexborough to Ipswich | 142.41 mi (229.18 km) |
| Mexborough to Irlam | 46.99 mi (75.62 km) |
| Mexborough to Irthlingborough | 85.85 mi (138.16 km) |
| Mexborough to Irvine | 199.44 mi (320.97 km) |
| Mexborough to Islington | 143.91 mi (231.60 km) |
