| Kirkwood to Silver Firs (Washington) | 1,706.57 mi (2,746.47 km) |
| Kirkwood to Silver Spring (Maryland) | 721.56 mi (1,161.25 km) |
| Kirkwood to Silver Springs Shores (Florida) | 811.83 mi (1,306.51 km) |
| Kirkwood to Silverdale (Washington) | 1,728.65 mi (2,781.99 km) |
| Kirkwood to Silverton (Oregon) | 1,712.58 mi (2,756.13 km) |
| Kirkwood to Simi Valley (California) | 1,596.31 mi (2,569.01 km) |
| Kirkwood to Simpsonville (South Carolina) | 524.59 mi (844.25 km) |
| Kirkwood to Sioux City (Iowa) | 413.95 mi (666.19 km) |
| Kirkwood to Sioux Falls (South Dakota) | 474.67 mi (763.91 km) |
| Kirkwood to Skokie (Illinois) | 277.46 mi (446.52 km) |
| Kirkwood to Sleepy Hollow (New York) | 893.55 mi (1,438.02 km) |
| Kirkwood to Slidell (Louisiana) | 573.94 mi (923.66 km) |
| Kirkwood to Smithfield (North Carolina) | 697.92 mi (1,123.19 km) |
| Kirkwood to Smithfield (Utah) | 1,148.57 mi (1,848.45 km) |
| Kirkwood to Smithville (Missouri) | 230.06 mi (370.24 km) |
