| Cabeceiras de Basto to Ifield | 759.19 mi (1,221.80 km) |
| Cabeceiras de Basto to Ilford | 791.32 mi (1,273.50 km) |
| Cabeceiras de Basto to Ilfracombe | 693.53 mi (1,116.13 km) |
| Cabeceiras de Basto to Ilkeston | 849.67 mi (1,367.41 km) |
| Cabeceiras de Basto to Ilkley | 902.44 mi (1,452.33 km) |
| Cabeceiras de Basto to Immingham | 909.11 mi (1,463.07 km) |
| Cabeceiras de Basto to Ince-in-Makerfield | 866.60 mi (1,394.66 km) |
| Cabeceiras de Basto to Inverness | 1,114.28 mi (1,793.27 km) |
| Cabeceiras de Basto to Inverurie | 1,116.18 mi (1,796.31 km) |
| Cabeceiras de Basto to Ipswich | 845.35 mi (1,360.47 km) |
| Cabeceiras de Basto to Irlam | 862.81 mi (1,388.55 km) |
| Cabeceiras de Basto to Irthlingborough | 822.30 mi (1,323.37 km) |
| Cabeceiras de Basto to Irvine | 985.02 mi (1,585.24 km) |
| Cabeceiras de Basto to Islington | 786.26 mi (1,265.36 km) |
| Cabeceiras de Basto to Iver | 775.99 mi (1,248.83 km) |
