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-present) which are not shown.

		1928-1966 Delta crop-dusting logo (originally created for the Huff Daland Dusting Company in 1925). Thor, the Norse god of thunder, war and agriculture, symbolizes the fight against the boll weevil insect in the 1920s.
		1929-1930 First passenger service logo featured Mercury, the Roman god of travel and commerce. The triangle represents the "D" of the Greek alphabet, which is "Delta."
		1934 Logo introduced when Delta began flying mail over Air Mail Route 24, from Ft. Worth, Texas to Charleston, South Carolina.
		1934-1951 Winged triangle represents the Greek letter "delta." From 1934-1939, often see the inscription "AM 24" (Air Mail Route 24) inside triangle.
		1945-1953 "Flying D" logo. Many variations of logo appeared up to 1959.
		1953-1955 Delta-C&S logo. Chicago & Southern (C&S) Airlines merged with Delta on May 1, 1953.
		1955-1959 Return to the "Flying D" logo used before C&S Airlines merger.
		1959 Jet "widget" logo. Introduced during Delta's "Royal JET Service" promotion for the DC-8, the first jet in 1959.
		1959-mid 1960s Sideways widget logo represents the speed of jets.
		1962-mid 1960s Widget in oval logo.
		1960s-1970s Small widget logo. Small widget over or on left side of the company name.
		ca. 1963-1993 Large widget logo. Large widget extends over the top of the word DELTA. "AIR LINES" may be included in smaller letters.
		1976 U.S. Bicentennial logo.
		April 1, 1985 Signature Service logo.
		Late 1980s-1990s Widget + Delta logo.
		Early 1990s-1995 Full corporate name logo.
		March 1995-March 2000 Full corporate name logo updated.
		March 2000-July 2004 Soft widget logo.
		July 2004-April 30, 2007 Based on employee feedback and nostalgia associated with Delta's 75th anniversary, the Heritage Widget replaced the softer widget logo.
		April 30, 2007-Present 3-dimensional red widget logo reflects Delta's successful transformation into a highly-differentiated, customer-focused airline.