This is a list of aircraft in alphabetical order beginning with 'So'.
(Sturgis, Michigan, United States)
(Stichting voor Ontwikkeling en Bouw van Experimenteel Hefschroefvligtuig)
(SOciété de Construction d'Avions de Tourisme et d'Affaires)
(Edwin Sochen)
(Södertelge Verkstäde)
(A. Soigneux)
(Innsbruck, Austria)
(Solar Aircraft Co (fdr: Edmund T Price), 1212 Juniper Ave, San Diego, CA)
(a division of P&M Aviation)
(Solaris Aviation)
(Alexander Soldenhoff)
(Solid Air UL-Bau Franz GmbH, Rheinland-Pfalz, Germany)
(Solo Wings CC, Gillitts, KwaZulu-Natal, South Africa)
( Soloy Aviation Solutions)
(Jaraguá do Sul, Brazil)
(William E Somerville, Coal City, IL)
(Deutsche Sommer-Werke)
(Sonaca Aircraft)
(Sondag-Pavia-Domecq)
(Takehiko Sonoda)
(John A Sons, Humble, TX)
(Keith Sorenson, Van Nuys, CA)
(Otto Sorrell, Rochester, WA)
(Hobart C Sorrell & Sons (John, Mark, Tim), Tenino, Washington, United States )
(Stryke-Air, Noillac, France)
(Southern Aeronautical Corporation, Miami Lakes, Florida, United States)
(Southern Aircraft Co. / Glenn E. Messer / Messer Aeronautical Industries Inc.)
(Southern Commercial Aircraft Co (founders: Walter & Merle Krouse), Hialeah, FL)
(Southern Aircraft Company)
(Southern Commercial Airmotive Corp, Dothan, AL)
(Southern Aircraft Div, Portable Products Corp (pres: Willis C Brown), Garland and Greenville, TX)
(Fleet Southern Aircraft Inc, Travis Field, Savannah, GA)
(Manncraft Airplane Co (pres: H W Mann), Collierville (Memphis), TN)
(Southern Eagles Avn Club, Baltimore, MD)
(Southern Pacific Aircraft corp, Santa Monica, CA)
(Nicholson, GA), (formerly called Condor Powered Parachutes)
(Southern Skies, LLC, Taylorsville, North Carolina, United States)
(Marcellus Sowers & C Haugsted, Nevada, IA)