| S & S Aviation | Nottingham | MD |
| S&J Enterprises, Inc | Jacksonville | FL |
| Sabrina Fisheries Corp | Hanscom AFB | MA |
| Sabris Aircraft Sales | Wichita | KS |
| Sacramento Aviation Management Co. | Sacramento | CA |
| Samaritan Air | Charlotte | NC |
| San Francisco Aircraft Sales | Napa | CA |
| Sandford Company, Inc | Wichita | KS |
| Santee Cooper Aviation | Fort Motte | SC |
| Sarasota Jet Services | Sarasota | FL |
| Saunders Aircraft Sales, LLC | Groton | CT |
| Savannah Aviation | Savannah | GA |
| Scat Aircraft Sales | Tulsa | OK |
| Schomer Aircraft Center, Inc. | New Smyrna Beach | FL |
| Scott Macdonald Aircraft Sales | Stuart | FL |
| Screaming Eagle | Santa Paula | CA |
| Sean O'Mahony | | CA |
| SEKO Enterprises, Inc. | Loganville | GA |
| Select Aviation | Omaha | NE |
| Sentient Flight Group, Inc. | Burlingame | CA |
| Sepello Aviation | Waterville | NY |
| Serendipity Air LLC | | VA |
| Serenity Aire, LLC | Broken Arrow | OK |
| Sharp Aviation, Inc. | Jonesboro | AR |
| Shoreline Aviation, Inc. | Marshfield | MA |
| Showalter Flying Service | Orlanda | FL |
| Shreveport Aircraft Sales, LLC | Shreveport | LA |
| Sierra Mountain Aviation | Grass Valley | CA |
| Silcott Aviation Sales & Solutions | St. Joseph | MO |
| Simmons Aviation Services | Pawcatuck | CT |
| Single Pilot Jet Management | Chesterfield | MO |
| Sipes Aircraft | Tulsa | OK |
| Six G Aviation LLC | Lakeland | FL |
| SJ & K Aviation LLC | Ankeny | IA |
| Skill Aviation | Waukegan | IL |
| Skinner Aviation | Ashland | OR |
| Sky King Corporation | Tulsa | OK |
| Sky Machines | Taos | NM |
| Sky Manor Aircraft Sales LLC. | Pittstown | NJ |
| Sky Shares | Denver | CO |
| Sky Sport Aviation | Broomfield | CO |
| SkyKnight Air Services, Inc. | Ft. Lauderdale | FL |
| Skymaster Center, Inc | Spartanburg | SC |
| SkysEdge, Incorporated | Roanoke | IN |
| SkyTech, Inc. | Baltimore | MD |
| SkyView Helicopters | | TX |
| Skyward Air Service | Seymour | IN |
| Skywater Jets | Pompano Beach | FL |
| Skyway Aircraft Inc. | St. Petersburg | FL |
| SMG Aircraft | Norfolk | VA |
| Smith & Sons Aircraft, LLC | Mena | AR |
| Smyrna Air Center | Smyrna | TN |
| SOASS, LLC | Ann Arbor | MI |
| Solidaire | Sacramento | CA |
| Soloy LLC | Olympia | WA |
| Sombra Aircraft Sales | Uvalde | TX |
| Soule' Enterprises, Inc | Miami | FL |
| Soundview Aviation | Norwalk | CT |
| South Delta Aviation Inc. | West Helena | AR |
| South Plains Implement | Seminole | TX |
| Southaire, Inc. | Memphis | TN |
| Southeast Aero Sales Inc. | St. Augustine | FL |
| Southeast Michigan Aircraft | Blissfield | MI |
| Southern Cross Aviation | Ft. Lauderdale | FL |
| Southern Wings Aircraft Sales | Bethany | OK |
| Southland Metals | Maumelle | AR |
| Southwest Aircraft Sales | El Paso | TX |
| Southwest Aircraft Sales | North Las Vegas | NV |
| Southwest Aviation | Tulsa | OK |
| Spitfire Aviation | Concord | NC |
| Spradling Oil Management | Borger | TX |
| Spring City Aviation | Waukesha | WI |
| St Louis Aircraft Sales | Chesterfield | MO |
| St. Charles Flying Service, Inc. | St. Charles | MO |
| Stallion Aircraft, Inc. | Huntley | IL |
| Stancil Aviation | Placerville | CA |
| Star Aircraft | Orlando | FL |
| Star Aviation | Austin | TX |
| Starbase Aviation | Houston | TX |
| Starfire LLC | Fayetteville | AR |
| Starks Twin Oaks Airpark Inc | Hillsboro | OR |
| StarPort USA | Sanford | FL |
| Stef Air LLC | Tuscumbia | AL |
| Steins Aircraft Services, LLC | Waukesha | WI |
| Stephens Aviation | Mishawaka | IN |
| Sterling Air, Ltd. | Carson City | NV |
| Sterling Airplanes & Parts, L.L.C | San Antonio | TX |
| Stetson Aircraft Sales Inc. | Kenedy | TX |
| Steve Weaver Aircraft Sales | Phillipi | WV |
| Stone Aviation, Inc. | Columbia | SC |
| Strasbaugh Development | San Luis Obispo | CA |
| Sugar Land Jet Sales | Sugarland | TX |
| Summit Aviation Sales | Belgrade | MT |
| Sun Desert Enterprises | Farmington | NM |
| Sun Valley Aviation | Hailey | ID |
| SunCountry Flight Services, LLC | Mesa | AZ |
| Sundance Aviation Inc. | Oklahoma City | OK |
| Sunset Vacations Corporation | | FL |
| Sunwest Aircraft Sales & Service | Addison | TX |
| Sunwest Aviation Ltd. | Calgary | AB |
| Symbolic Aviation | Carlsbad | CA |
