| Santarem to Silver Firs (Washington) | 5,168.50 mi (8,317.90 km) |
| Santarem to Silver Spring (Maryland) | 3,569.57 mi (5,744.67 km) |
| Santarem to Silver Springs Shores (Florida) | 4,137.10 mi (6,658.02 km) |
| Santarem to Silverdale (Washington) | 5,195.93 mi (8,362.04 km) |
| Santarem to Silverton (Oregon) | 5,325.37 mi (8,570.36 km) |
| Santarem to Simi Valley (California) | 5,676.26 mi (9,135.06 km) |
| Santarem to Simpsonville (South Carolina) | 3,958.44 mi (6,370.50 km) |
| Santarem to Sioux City (Iowa) | 4,369.93 mi (7,032.72 km) |
| Santarem to Sioux Falls (South Dakota) | 4,349.07 mi (6,999.15 km) |
| Santarem to Skokie (Illinois) | 3,994.18 mi (6,428.00 km) |
| Santarem to Sleepy Hollow (New York) | 3,361.11 mi (5,409.18 km) |
| Santarem to Slidell (Louisiana) | 4,491.52 mi (7,228.40 km) |
| Santarem to Smithfield (North Carolina) | 3,737.21 mi (6,014.46 km) |
| Santarem to Smithfield (Utah) | 5,050.89 mi (8,128.62 km) |
| Santarem to Smithville (Missouri) | 4,395.78 mi (7,074.33 km) |
