E
- E & K, E & K Sp z oo – Poland
- EAA, Experimental Aircraft Association Inc – United States
- EAC, Etudes Aéronautiques & Commerciales SARL – France
- EADS, European Aeronautic Defence and Space Company – France/Germany/Spain, (2000–present) (EADS)
- EADS 3 Sigma (formerly 3 Sigma) – Greece
- Eagle, Eagle Aircraft Company – United States
- Eagle Aircraft, Eagle Aircraft Australia Ltd – Australia
- Eagle Aircraft, Eagle Aircraft International – Australia
- Eagle Aircraft, Eagle Aircraft Pty Ltd – Australia
- Eagles Wing Corporation, Normandy, Tennessee, United States
- Early Bird, Early Bird Aircraft Company – United States
- EasyUp, Medford, Oregon, United States
- EAY – Empresa Aeronáutica Ypiranga – Brazil
- Eberhart, Eberhart – United States
- Eclipse, Eclipse Aviation Corporation – United States
- Ector, Ector Aircraft Company – United States
- Edel Paragliders, Gwangju, South Korea
- Edgar Percival, Edgar Percival Aircraft Ltd. (defunct) – United Kingdom
- Edgley, Edgley Aircraft Ltd – United Kingdom
- EDRA, EDRA Aeronáutica – Brazil
- EDRA, EDRA Helicentro Peças e Manutençao – Brazil
- EEL (Entwicklung und Erprobung von Leichtflugzeugen), Putzbrunn, Germany
- EHI, EH Industries Ltd – United Kingdom/Italy
- Eich, James P. Eich – United States
- EIRI, Eiriavion OY – Finland
- EIS, EIS Aircraft GmbH – Germany
- Ekolot, PPHU Ekolot – Poland
- EFW, Eidgenössische Flugzeugwerke Emmen – Switzerland, (Federal Aircraft Factory)
- ELA Aviación, ELA Aviación SL – Spain
- Elbit, Elbit Systems Ltd – Israel
- Elicotteri Meridionali, Elicotteri Meridionali – Italy, (1967–?)
- Elitar, Ehlitar OOO – Russia
- Ellison-Mahon Aircraft, – US (Seattle, Washington)
- Elmwood, Elmwood Aviation – Canada
- Emair, Emair Inc – United States
- Emair, Emair, Division of Emroth Company – United States
- EMBRAER, Empresa Brasileira de Aeronáutica SA – Brazil
- EMBRAER-FMA, see EMBRAER and FMA – Brazil/Argentina
- Emroth, Emroth Company – United States
- ENAER, Empresa Nacional de Aeronáutica – Chile
- English Electric, English Electric Aviation Ltd – United Kingdom, (?-1959) > British Aircraft Corporation
- English Electric, English Electric Company Ltd – United Kingdom
- Enstrom, R. J. Enstrom Corporation – United States
- Enstrom, The Enstrom Helicopter Corporation – United States
- Epervier, Epervier Aviation SA – Belgium
- Epps, Ben T. Epps – United States
- ERCO, Engineering and Research Corporation – United States
- ERPALS, Erpals Industrie, Etudes et Réalisations de Prototypes pour l'Aviation Légère et Sportive – France
- Esnault-Pelterie, Robert Esnault-Pelterie – France
- Ethiopian Airlines, Ethiopian Airlines Enterprise – Ethiopia
- Ethiopian Airlines, Ethiopian Airlines SC – Ethiopia
- Etrich, Etrich – Austria
- Euler, Euler – Germany
- Eurocopter, Eurocopter Canada Ltd – Canada, (1992–present)
- Eurocopter, Eurocopter GIE – France/Germany
- Eurocopter, Eurocopter SA – France/Germany
- Eurocopter, Eurocopter SAS – France/Germany
- Eurocopter-Kawasaki, see Eurocopter and Kawasaki – France/Germany/Japan
- Euro-Enaer, Euro-Enaer Holding BV – Netherlands
- Eurofighter, Eurofighter Jagdflugzeug GmbH – Germany/UK/Italy/Spain
- Euronef, Euronef SA – Belgium
- Europa, Europa Aviation Ltd – United Kingdom
- Eurospace, Eurospace Costruzioni Srl – Italy
- Evangel, Evangel Aircraft Corporation – United States
- Evans, Evans Aircraft – United States
- Evans, W. Samuel Evans – United States
- Evektor-Aerotechnik, Evektor-Aerotechnik AS – Czech Republic
- Evolution Aircraft, Redmond, Oregon, United States
- EWR, Entwicklungsring-Süd – Germany
- Excalibur, Excalibur Aviation Company – United States
- Exclusive, Exclusive Aviation – United States
- Experimental Aviation, Experimental Aviation Inc – United States
- Explorair, Ebringen, Breisgau-Hochschwarzwald, Baden-Württemberg, Germany
- Explorer (1), Explorer Aviation – United States
- Explorer (2), Explorer Aircraft Inc – United States
- Express, Express Aircraft Company LLC – United States
- Express, Express Design Inc – United States
- Extra, Extra Flugzeugbau GmbH – Germany
- Extra, Extra Flugzeugproduktions- und Vertriebs- GmbH – Germany