| Thatcham to Ickenham | 36.65 mi (58.99 km) |
| Thatcham to Ifield | 49.66 mi (79.91 km) |
| Thatcham to Ilford | 59.03 mi (95.00 km) |
| Thatcham to Ilfracombe | 124.10 mi (199.72 km) |
| Thatcham to Ilkeston | 108.22 mi (174.16 km) |
| Thatcham to Ilkley | 175.68 mi (282.72 km) |
| Thatcham to Immingham | 158.82 mi (255.60 km) |
| Thatcham to Ince-in-Makerfield | 157.86 mi (254.05 km) |
| Thatcham to Inverness | 436.02 mi (701.71 km) |
| Thatcham to Inverurie | 408.39 mi (657.24 km) |
| Thatcham to Ipswich | 112.97 mi (181.81 km) |
| Thatcham to Irlam | 149.15 mi (240.03 km) |
| Thatcham to Irthlingborough | 69.29 mi (111.51 km) |
| Thatcham to Irvine | 322.86 mi (519.60 km) |
| Thatcham to Islington | 50.89 mi (81.90 km) |
