I would imagine prices will change since this is a newly posted route, but I will never understand airline pricing. For reference, CLT and ATL are about the same driving distance for us:

June 1 from the AA website;

ATL - MIA - EIS - Main $2,291, Business $3,565

CLT - MIA - EIS - Main $2,215, Business $3,815

MIA - EIS - Main $2,213, Business $3,742