Chicago is 6% cheaper than St. Petersburg.
When comparing Chicago, IL and St. Petersburg, FL, the overall cost of living indices are 100 and 106 respectively (national median = 100). Rent is $162/month cheaper in Chicago, saving renters about $1,944/year.
Median household income is $2,016/year higher in Chicago. Home values also differ significantly — the median in Chicago is $315,200 compared to $331,500 in St. Petersburg.
Florida has no state income tax, giving St. Petersburg residents a significant tax advantage over Illinois's 4.95% rate.
Chicago vs St. Petersburg — common questions
Other cost of living comparisons for Chicago and St. Petersburg