STP Airways

STP Airways is the national airline of São Tomé, São Tomé and Príncipe. It is currently on the list of carriers banned from operating into the European Union, so its flights are operated by the Portuguese airline EuroAtlantic Airways.
STP Airways commenced operations in 2008 with flights between Lisbon, Portugal, and São Tomé with an aircraft leased from parent company, EuroAtlantic Airways.
Source: Wikipdia December 2019