Open skies is an international policy concept that calls for the liberalization of the rules and regulations of the international aviation industry—especially commercial aviation—in order to create a free-market environment for the airline industry. Its primary objectives are:
to liberalize the rules for international aviation markets and minimize government intervention as it applies to passenger, all-cargo, and combination air transportation as well as scheduled and charter services; and
to adjust the regime under which military and other state-based flights may be permitted.
For open skies to become effective, a bilateral (and sometimes multilateral) Air Transport Agreement must be concluded between two or more nations.