| Sintra to Stephenville (Texas) | 4,813.54 mi (7,746.65 km) |
| Sintra to Sterling (Colorado) | 4,723.56 mi (7,601.84 km) |
| Sintra to Sterling (Illinois) | 4,074.56 mi (6,557.37 km) |
| Sintra to Sterling (Virginia) | 3,565.57 mi (5,738.22 km) |
| Sintra to Sterling Heights (Michigan) | 3,741.78 mi (6,021.81 km) |
| Sintra to Steubenville (Ohio) | 3,687.94 mi (5,935.16 km) |
| Sintra to Stevens Point (Wisconsin) | 3,986.90 mi (6,416.29 km) |
| Sintra to Stevenson Ranch (California) | 5,652.73 mi (9,097.19 km) |
| Sintra to Stillwater (Minnesota) | 4,116.39 mi (6,624.68 km) |
| Sintra to Stillwater (Oklahoma) | 4,611.38 mi (7,421.30 km) |
| Sintra to Stockbridge (Georgia) | 4,072.23 mi (6,553.62 km) |
| Sintra to Stockton (California) | 5,597.48 mi (9,008.28 km) |
| Sintra to Stone Ridge (Virginia) | 3,575.06 mi (5,753.50 km) |
| Sintra to Stonecrest (Georgia) | 4,062.32 mi (6,537.68 km) |
| Sintra to Stony Brook (New York) | 3,306.94 mi (5,322.01 km) |
