Short answers, pulled from the story.
Porco Rosso was released theatrically in Japan on the 18th of July 1992 by Toho. The film became the number-one movie on the Japanese market that same year with gross receipts equivalent to millions of dollars.
Studio Ghibli produced the feature-length version while Toshio Suzuki served as producer. Telecom Animation Film Co., Ltd. assisted with animation duties during production.
The fictional Piccolo aircraft company draws inspiration from real Italian manufacturers Caproni and Piaggio. Carlo Ferrarin designed the Caproni C-22J jet shown in the final scene of the movie.
The outbreak of war in Yugoslavia cast a shadow over production and prompted a more serious tone for the film. Miyazaki reflected that conflicts breaking out during production made Porco Rosso much more complicated than originally planned.
Japan Airlines commissioned an English dub produced in Japan in 1992 for viewing on international flights. Disney released the film on DVD on the 22nd of February 2005 featuring voices from Michael Keaton and Cary Elwes.