Teams led by national firms Odebrecht and CCR have won the concessions for Galeão and Confins respectively, which are based in Rio de Janeiro city and Minas Gerais state capital Belo Horizonte.
The Odebrecht-led team will include Odebrecht TransPort and Singapore's airport operator Changi, which beat off proposals from four other bidders and will now invest around $2.7bn throughout the concession period.
During this time, the consortium will be responsible for the expansion of the current facility, including the construction of 26 loading bridges and a new car park for 1,850 vehicles.
As part of the bidding process for the Confins deal, the CCR-led team, which also includes airport operators Flughafen Zurich and Flughafen München, beat off proposals from two rival bidders to secure the deal.
A total of around $2bn is expected to be invested throughout the concession period, which will see the construction of a new passenger terminal with at least 14 loading bridges and airport apron expansion works by 2016.