CONSENT OF INDEPENDENT AUDITORS


We consent to the  incorporation  by  reference in the  Registration  Statements
(Form S-8 No. 33-27894) pertaining to the Aon Savings Plan of Aon Corporation of
our report dated June 4, 2003,  with  respect to the  financial  statements  and
schedule of the Aon Savings Plan  included in this annual report (Form 11-K) for
the year ended December 31, 2002.






June 24, 2003                                             Ernst & Young LLP
Chicago, Illinois