Tim Brown was kind enough to make these WLS airchecks available to us.
Airchecks are alphabetical by WLS personality last names.

WLS Chuck Buell Aircheck - September 6, 1971
The Big 89 WLS - Mike McCormick Program Director
WLS News: Bud Miller
PAMS Jingle Singers

WLS Yvonne Daniels Aircheck - May, 1976
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Jeff Davis Aircheck - October, 1980
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Jeff Davis Aircheck - March, 1984
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Tommy Edwards Aircheck - July 1978
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Tommy Edwards Aircheck - May 18, 1982
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Don Geronimo Aircheck - March 9, 1983
Musicradio WLS - John Gehron Program Director
WLS News: Bud Miller
JAM Jingle Singers

WLS Don Geronimo Aircheck - September 1, 1982
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Bob Hale Aircheck - July 8, 1960
WLS - Ralph Blank Program Director
Anita Kerr Jingle Singers

WLS JJ Jeffrey Aircheck - November 8, 1975
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS JJ Jeffrey Aircheck - August 1975
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Tom Kent Aircheck - May 3, 1980
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Tom Kent Aircheck - August, 1980
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Steve King Aircheck - March 26, 1974
Musicradio WLS - John Gehron Program Director
PAMS Jingle Singers

WLS Steve King Aircheck - November 27, 1977
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS John Records Landecker Aircheck - September 4, 1974
Musicradio WLS - Tommy Edwards Program Director
PAMS Jingle Singers

WLS John Records Landecker Aircheck - August 1975
Musicradio WLS - Tommy Edwards Program Director
PAMS Jingle Singers

WLS Larry Lujack Aircheck - June 29, 1977
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Larry Lujack Aircheck - September 15, 1978
Musicradio WLS - John Gehron Program Director
WLS News - Jeffrey Hendrix, Kathy McFarland
ABC Sports - Howard Cosell
JAM Jingle Singers

WLS Brant Miller Aircheck - April, 1981
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Brant Miller Aircheck - January 15, 1985
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Susan Platt Aircheck - May 26, 1982
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS-FM Susan Platt Aircheck - June 21, 1985
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Turi Ryder Aircheck - December 20, 1985
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Dick Sainte Aircheck - July 27, 1972
The Rock Of Chicago WLS - Mike McCormick Program Director
ABC News: Paul Harvey
PAMS Studio C Singers

WLS Chris Shebel Aircheck - May 24, 1982
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Bob Sirott Aircheck - December, 1974
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Bob Sirott Aircheck - January, 1975
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Bob Sirott Aircheck - January 1976
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Bob Sirott Aircheck - November 2, 1977
Musicradio WLS - John Gehron Program Director
JAM Jingle Singers

WLS Kris Erik Stevens Aircheck - June 10, 1969
The Big 89 WLS - John Rook Program Director
PAMS Jingle Singers

WLS Kris Erik Stevens Aircheck - 1971
The Big 89 WLS / 
The Rock Of Chicago - Mike McCormick Program Director
WLS News - Roy Wood
PAMS Jingle Singers / PAMS Studio C Singers

WLS Charlie Van Dyke Aircheck - May 11, 1973
Musicradio WLS - Tommy Edwards Program Director
JAM Jingle Singers

WLS Fred Winston Aircheck - December, 1974
Musicradio WLS - Tommy Edwards Program Director
WLS News: Lyle Dean
ABC News: Don Gardiner
JAM Jingle Singers

WLS Fred Winston Airheck - June 28, 1971 (filling in for Larry Lujack)
The Big 89 WLS - Mike McCormick Program Director
WLS News - Lyle Dean
PAMS Jingle Singers

WLS Jingle Cart Montage
The Rock Of Chicago / Musicradio WLS
PAMS / JAM Jingle Singers