| Sintra to Southern Pines (North Carolina) | 3,774.87 mi (6,075.07 km) |
| Sintra to Southfield (Michigan) | 3,755.37 mi (6,043.68 km) |
| Sintra to Southgate (Michigan) | 3,760.12 mi (6,051.32 km) |
| Sintra to Southlake (Texas) | 4,733.38 mi (7,617.64 km) |
| Sintra to Spanaway (Washington) | 5,212.40 mi (8,388.54 km) |
| Sintra to Spanish Fork (Utah) | 5,106.48 mi (8,218.09 km) |
| Sintra to Spanish Lake (Missouri) | 4,193.67 mi (6,749.06 km) |
| Sintra to Spanish Springs (Nevada) | 5,453.94 mi (8,777.27 km) |
| Sintra to Sparks (Nevada) | 5,459.63 mi (8,786.43 km) |
| Sintra to Spartanburg (South Carolina) | 3,910.07 mi (6,292.65 km) |
| Sintra to Spearfish (South Dakota) | 4,605.71 mi (7,412.17 km) |
| Sintra to Speedway (Indiana) | 3,973.49 mi (6,394.71 km) |
| Sintra to Spencer (Iowa) | 4,279.18 mi (6,886.68 km) |
| Sintra to Spokane (Washington) | 5,009.57 mi (8,062.13 km) |
| Sintra to Spokane Valley (Washington) | 5,002.59 mi (8,050.89 km) |
