| Sintra to Somersworth (New Hampshire) | 3,147.53 mi (5,065.46 km) |
| Sintra to Somerton (Arizona) | 5,565.31 mi (8,956.50 km) |
| Sintra to Somerville (Massachusetts) | 3,175.27 mi (5,110.11 km) |
| Sintra to Somerville (New Jersey) | 3,387.77 mi (5,452.09 km) |
| Sintra to Sonoma (California) | 5,628.12 mi (9,057.59 km) |
| Sintra to Soquel (California) | 5,669.23 mi (9,123.75 km) |
| Sintra to South Bend (Indiana) | 3,918.85 mi (6,306.78 km) |
| Sintra to South Bradenton (Florida) | 4,196.17 mi (6,753.08 km) |
| Sintra to South Burlington (Vermont) | 3,235.50 mi (5,207.04 km) |
| Sintra to South Charleston (West Virginia) | 3,796.73 mi (6,110.25 km) |
| Sintra to South Daytona (Florida) | 4,053.65 mi (6,523.71 km) |
| Sintra to South El Monte (California) | 5,645.43 mi (9,085.44 km) |
| Sintra to South Elgin (Illinois) | 4,004.86 mi (6,445.20 km) |
| Sintra to South Euclid (Ohio) | 3,698.70 mi (5,952.48 km) |
| Sintra to South Farmingdale (New York) | 3,327.06 mi (5,354.39 km) |
