| Estoril to Indianola (Iowa) | 4,269.11 mi (6,870.47 km) |
| Estoril to Indio (California) | 5,585.12 mi (8,988.38 km) |
| Estoril to Inglewood (California) | 5,665.92 mi (9,118.41 km) |
| Estoril to Inkster (Michigan) | 3,765.58 mi (6,060.11 km) |
| Estoril to Inver Grove Heights (Minnesota) | 4,136.87 mi (6,657.65 km) |
| Estoril to Inwood (New York) | 3,346.41 mi (5,385.53 km) |
| Estoril to Iona (Florida) | 4,198.30 mi (6,756.51 km) |
| Estoril to Ionia (Michigan) | 3,829.22 mi (6,162.53 km) |
| Estoril to Iowa City (Iowa) | 4,166.48 mi (6,705.30 km) |
| Estoril to Irmo (South Carolina) | 3,901.38 mi (6,278.66 km) |
| Estoril to Irondale (Alabama) | 4,195.99 mi (6,752.80 km) |
| Estoril to Ironton (Ohio) | 3,840.64 mi (6,180.91 km) |
| Estoril to Irvine (California) | 5,654.30 mi (9,099.71 km) |
| Estoril to Irving (Texas) | 4,730.61 mi (7,613.18 km) |
| Estoril to Isabela (Puerto Rico) | 3,697.16 mi (5,950.00 km) |
