| Iona to Benavente | 4,226.01 mi (6,801.10 km) |
| Iona to Bombarral | 4,203.06 mi (6,764.17 km) |
| Iona to Bougado | 4,205.67 mi (6,768.37 km) |
| Iona to Braga | 4,209.93 mi (6,775.23 km) |
| Iona to Braganca | 4,290.48 mi (6,904.87 km) |
| Iona to Cabeceiras de Basto | 4,230.63 mi (6,808.54 km) |
| Iona to Cacem | 4,202.11 mi (6,762.64 km) |
| Iona to Cadaval | 4,206.45 mi (6,769.63 km) |
| Iona to Caldas da Rainha | 4,202.13 mi (6,762.67 km) |
| Iona to Calheta | 3,856.08 mi (6,205.77 km) |
| Iona to Camara de Lobos | 3,867.20 mi (6,223.65 km) |
| Iona to Canico | 3,875.24 mi (6,236.59 km) |
| Iona to Cantanhede | 4,217.21 mi (6,786.95 km) |
| Iona to Carregal do Sal | 4,246.62 mi (6,834.27 km) |
| Iona to Cartaxo | 4,224.23 mi (6,798.25 km) |
