According to the Presidential Decree, effective from effective from July 27, 2018 foreign citizens of 74 countries can enter Belarus for up to 30 days and exit from the territory of Belarus only through the State border checkpoint of the Republic of Belarus “Minsk National Airport”. .
The term of visa-free stay is calculated in calendar days; the first day corresponds to the date of arrival, the last day coincides with the date of departure (regardless of the time of arrival and/or departure).
The given order of visa-free movement through the airport does not extend to persons coming to Belarus by plane from the Russian Federation, as well as to those who intend to fly to the airports of the Russian Federation (such flights are considered as internal ones and do not have border control).
The detailed information and the list of countries can be found here.