Delta BrandDelta Logo Timeline Delta's most distinctive trademarks! Dates indicate years when they regularly appeared in advertising and internal communication. Note: Variations existed of many logos (especially 1970s-1990s) which are not shown. 1929 Delta Air Service founded in 1928; started passenger service on June 17, 1929. Logo featured Mercury, the Roman god of travel and commerce. The triangle represented the "D" of the Greek alphabet, which is "delta." 1930Delta crop-dusting logo (originally created for predecessor Huff Daland Dustersin 1925). Thor, the Norse god of thunder, war and agriculture, symbolizes the fight against the boll weevil insect destroying the cotton field of the southern United States in the 1920s. 1934-1951 Winged triangle represents the Greek letter "delta." From 1934-1939, the inscription "AM 24" (Air Mail Route 24) was often included inside the triangle. 1935 Logo promoted flying Delta for "Speed, Comfort, and Convenience." 1945-1953 Flying D logo. Many v...
