| Castelo Branco to Indianola (Iowa) | 4,314.05 mi (6,942.79 km) |
| Castelo Branco to Indio (California) | 5,620.55 mi (9,045.40 km) |
| Castelo Branco to Inglewood (California) | 5,698.44 mi (9,170.76 km) |
| Castelo Branco to Inkster (Michigan) | 3,816.75 mi (6,142.47 km) |
| Castelo Branco to Inver Grove Heights (Minnesota) | 4,174.90 mi (6,718.86 km) |
| Castelo Branco to Inwood (New York) | 3,408.40 mi (5,485.30 km) |
| Castelo Branco to Iona (Florida) | 4,281.37 mi (6,890.20 km) |
| Castelo Branco to Ionia (Michigan) | 3,877.52 mi (6,240.26 km) |
| Castelo Branco to Iowa City (Iowa) | 4,212.53 mi (6,779.42 km) |
| Castelo Branco to Irmo (South Carolina) | 3,971.60 mi (6,391.68 km) |
| Castelo Branco to Irondale (Alabama) | 4,262.45 mi (6,859.75 km) |
| Castelo Branco to Ironton (Ohio) | 3,900.59 mi (6,277.39 km) |
| Castelo Branco to Irvine (California) | 5,687.96 mi (9,153.89 km) |
| Castelo Branco to Irving (Texas) | 4,788.54 mi (7,706.40 km) |
| Castelo Branco to Isabela (Puerto Rico) | 3,804.73 mi (6,123.11 km) |
