Imperial Airways was created on 1924-03-31.
Imperial Japanese Airways was created in 1938.
Hellenic Imperial Airways was created in 2006-05.
Imperial Airways ended in 1939.
There is some Imperial Airways stuff at the Croydon Airport Society archive (http://www.croydonairport.org.uk/)
British Airways Ltd. ended in 1939.
Discovery Airways was created in 1989.
ArGo Airways was created in 2009.
Schreiner Airways was created in 1945.
Georgian Airways was created in 2004.
Slick Airways was created in 1946.
Cascade Airways was created in 1969.
Angkor Airways was created in 2004.