Advertising

ADS/LOGOS
Since the experimental years of aviation involved mostly U.S. military and postal service operations, no advertisements or commercial logos relating to United Airlines' predecessor companies existed at the time.

Era 2 (1926-1933)

Era 7 (1970-1989)

Era 3 (1934-1940)

Era 8 (1990-1993)

Era 4 (1941-1945)

Era 9 (1994-1999)

Era 5 (1946-1958)

Era 10 (2000-...)

Era 6 (1959-1969)