| Peniche to Silver Firs (Washington) | 5,139.05 mi (8,270.50 km) |
| Peniche to Silver Spring (Maryland) | 3,532.91 mi (5,685.67 km) |
| Peniche to Silver Springs Shores (Florida) | 4,099.85 mi (6,598.08 km) |
| Peniche to Silverdale (Washington) | 5,166.52 mi (8,314.70 km) |
| Peniche to Silverton (Oregon) | 5,295.19 mi (8,521.79 km) |
| Peniche to Simi Valley (California) | 5,642.70 mi (9,081.05 km) |
| Peniche to Simpsonville (South Carolina) | 3,921.52 mi (6,311.08 km) |
| Peniche to Sioux City (Iowa) | 4,335.33 mi (6,977.04 km) |
| Peniche to Sioux Falls (South Dakota) | 4,314.76 mi (6,943.93 km) |
| Peniche to Skokie (Illinois) | 3,958.71 mi (6,370.93 km) |
| Peniche to Sleepy Hollow (New York) | 3,324.62 mi (5,350.46 km) |
| Peniche to Slidell (Louisiana) | 4,454.54 mi (7,168.89 km) |
| Peniche to Smithfield (North Carolina) | 3,700.22 mi (5,954.93 km) |
| Peniche to Smithfield (Utah) | 5,018.01 mi (8,075.70 km) |
| Peniche to Smithville (Missouri) | 4,360.34 mi (7,017.30 km) |
