Annobón is connected with scheduled air service by CEIBA Intercontinental, an Equatoguinean airline, to Malabo, Equatorial Guinea and Bata, Equatorial Guinea. These routes use various ATR multi-engine turboprops.
CEIBA Intercontinental has an operating agreement with a Portuguese charter airline, White Airways, to provide scheduled air service between Malabo and Madrid, Spain. This route uses a Boeing 777-200ER multi-engine turbofan.
Therefore, you can travel on CEIBA Intercontinental (operated by White Airways) from Madrid, Spain to Malabo, Equatorial Guinea, and from Malabo you can travel on CEIBA Intercontinental to Annobón.