| Flughafenkürzel |
Stadt / Flughafen |
| SGY |
Skagway, AK - Skagway Airport |
| SKW |
Skwentna, AK - Skwentna Airport |
| SLQ |
Sleetmute, AK - Sleetmute Airport |
| SCJ |
Smith Cove, AK |
| MQY |
Smyrna, TN - Smyrna Airport |
| SNK |
Snyder, TX - Winston Field |
| ONM |
Socorro, NM - Socorro Municipal Airport |
| SXQ |
Soldotna, AK - Soldotna Airport |
| SOL |
Solomon, AK - Solomon State Field |
| OLG |
Solon Springs, WI - Solon Springs Municipal Airport |
| SME |
Somerset, KY - Somerset-Pulaski County Airport-J. T. Wilson Field |
| FYE |
Somerville, TN - Fayette County Airport |
| SBN |
South Bend, IN - Michiana Regional Transportation Center Airport |
| AVC |
South Hill, VA - Mecklenburg-Brunswick Regional Airport |
| WSN |
South Naknek, AK - South Naknek nr. 2 Airport |
| NZW |
South Weymouth, MA - South Weymouth Naval Air Station (Shea Field) |
| SHQ |
Southport, NC - Brunswick County Airport |
| SVW |
Sparrevohn, AK - Sparrevohn LRRS |
| SAR |
Sparta, IL - Sparta Community Airport-Hunter Field |
| CMY |
Sparta, WI - Sparta/Fort McCoy Airport |
| SPA |
Spartanburg, SC - Spartanburg Downtown Memorial Airport |
| SPF |
Spearfish, SD - Black Hills Airport-Clyde Ice Field |
| SPW |
Spencer, IA - Spencer Municipal Airport |
| SKA |
Spokane, WA - Fairchild Air Force Base |
| SFF |
Spokane, WA - Felts Field |
| GEG |
Spokane, WA - Spokane International Airport |
| SPZ |
Springdale, AR - Springdale Municipal Airport |
| SPI |
Springfield, IL - Capital Airport |
| SFY |
Springfield, MA |
| SGF |
Springfield, MO - Springfield Regional Airport |
| SGH |
Springfield, OH - Springfield-Beckley Municipal Airport |
| VSF |
Springfield, VT - Hartness State (Springfield) Airport |
| CEF |
Springfield/Chicopee, MA - Westover Air Reserve Base/Metropolitan Airport |
| UST |
St. Augustine, FL - St. Augustine Airport |
| JSK |
St. Cloud, MN - St. Cloud Hospital Heliport |
| STC |
St. Cloud, MN - St. Cloud Municipal Airport |
| SYF |
St. Francis, KS - Cheyenne County Municipal Airport |
| STG |
St. George Island, AK - St. George Airport |
| SGU |
St. George, UT - St. George Municipal Airport |
| SJN |
St. Johns, AZ - St. Johns Industrial Air Park |
| STJ |
St. Joseph, MO - Rosecrans Memorial Airport |
| STL |
St. Louis, MO - Lambert-St. Louis International Airport |
| SUS |
St. Louis, MO - Spirit of St. Louis Airport |
| KSM |
St. Mary's, AK - St. Mary's Airport |
| XSM |
St. Mary's, MD |
| STQ |
St. Marys, PA - St. Marys Municipal Airport |
| SMK |
St. Michael, AK - St. Michael Airport |
| SNP |
St. Paul Island, AK - St. Paul Island Airport |
| STP |
St. Paul, MN - St. Paul Downtown Holman Field |
| SPG |
St. Petersburg, FL - Albert Whitted Airport |