| Sintra to Superior (Colorado) | 4,836.07 mi (7,782.91 km) |
| Sintra to Superior (Wisconsin) | 4,035.21 mi (6,494.05 km) |
| Sintra to Surprise (Arizona) | 5,417.59 mi (8,718.77 km) |
| Sintra to Susanville (California) | 5,455.67 mi (8,780.05 km) |
| Sintra to Sussex (Wisconsin) | 3,967.02 mi (6,384.31 km) |
| Sintra to Suwanee (Georgia) | 4,046.83 mi (6,512.74 km) |
| Sintra to Swansea (Illinois) | 4,190.84 mi (6,744.51 km) |
| Sintra to Sweetwater (Florida) | 4,140.46 mi (6,663.43 km) |
| Sintra to Sweetwater (Texas) | 4,909.39 mi (7,900.90 km) |
| Sintra to Sycamore (Illinois) | 4,021.78 mi (6,472.42 km) |
| Sintra to Sylacauga (Alabama) | 4,186.39 mi (6,737.35 km) |
| Sintra to Sylvania (Ohio) | 3,797.40 mi (6,111.33 km) |
| Sintra to Syosset (New York) | 3,327.46 mi (5,355.02 km) |
| Sintra to Syracuse (New York) | 3,404.42 mi (5,478.89 km) |
| Sintra to Syracuse (Utah) | 5,083.23 mi (8,180.67 km) |
