| Penafiel to Indianola (Iowa) | 4,228.37 mi (6,804.91 km) |
| Penafiel to Indio (California) | 5,530.00 mi (8,899.68 km) |
| Penafiel to Inglewood (California) | 5,606.67 mi (9,023.06 km) |
| Penafiel to Inkster (Michigan) | 3,734.63 mi (6,010.30 km) |
| Penafiel to Inver Grove Heights (Minnesota) | 4,086.00 mi (6,575.78 km) |
| Penafiel to Inwood (New York) | 3,333.06 mi (5,364.03 km) |
| Penafiel to Iona (Florida) | 4,221.42 mi (6,793.72 km) |
| Penafiel to Ionia (Michigan) | 3,793.80 mi (6,105.53 km) |
| Penafiel to Iowa City (Iowa) | 4,127.47 mi (6,642.53 km) |
| Penafiel to Irmo (South Carolina) | 3,901.54 mi (6,278.92 km) |
| Penafiel to Irondale (Alabama) | 4,189.54 mi (6,742.41 km) |
| Penafiel to Ironton (Ohio) | 3,823.60 mi (6,153.49 km) |
| Penafiel to Irvine (California) | 5,596.66 mi (9,006.95 km) |
| Penafiel to Irving (Texas) | 4,709.84 mi (7,579.75 km) |
| Penafiel to Isabela (Puerto Rico) | 3,772.51 mi (6,071.27 km) |
