| Sintra to Hutchinson (Minnesota) | 4,189.26 mi (6,741.96 km) |
| Sintra to Hutto (Texas) | 4,845.06 mi (7,797.36 km) |
| Sintra to Hyattsville (Maryland) | 3,544.43 mi (5,704.21 km) |
| Sintra to Hybla Valley (Virginia) | 3,556.43 mi (5,723.52 km) |
| Sintra to Idaho Falls (Idaho) | 4,981.41 mi (8,016.81 km) |
| Sintra to Idylwood (Virginia) | 3,558.78 mi (5,727.30 km) |
| Sintra to Ilchester (Maryland) | 3,528.39 mi (5,678.39 km) |
| Sintra to Immokalee (Florida) | 4,172.54 mi (6,715.05 km) |
| Sintra to Imperial (California) | 5,593.16 mi (9,001.32 km) |
| Sintra to Imperial Beach (California) | 5,673.15 mi (9,130.05 km) |
| Sintra to Independence (Kentucky) | 3,917.07 mi (6,303.91 km) |
| Sintra to Independence (Missouri) | 4,378.60 mi (7,046.68 km) |
| Sintra to Indian Trail (North Carolina) | 3,841.50 mi (6,182.30 km) |
| Sintra to Indiana (Pennsylvania) | 3,608.55 mi (5,807.40 km) |
| Sintra to Indianapolis (Indiana) | 3,969.10 mi (6,387.65 km) |
