Airline connectivity services offered to passengers and crew are of great importance to the air transport sector. Aircraft terminal antennas can assist, but this increases total costs. Electronically steered antennas (ESAs) have emerged as a viable solution because they can track two or more satellites simultaneously. Also, they have a reduced size compared to traditional mechanical ones as well as improved reliability. The EU-funded LESAF project proposes an ESA solution of reduced size and great efficiency for the next generation of in-flight connectivity services. This will be managed through the requirements definition, system analysis, technology assessment, prototyping and validation of ESAs. The project intends to demonstrate that ESAs represent the best technological solution for the needs of the aviation sector.