The EUROCONTROL 2022 report, presents long-term projections for flights and CO₂ emissions under three different scenarios: low, base, and high. In the base scenario, the European aviation sector is anticipated to experience significant growth, with flight numbers rising 44% above with respect to 2019 levels. It is expected to reach approximately 16 million flights annually by 2050. This increase in air traffic will drive a substantial rise in fossil fuel consumption, resulting in millions of gigatons of CO₂ emissions from the aviation industry. Among available mitigation strategies, sustainable aviation fuels (SAF) present the most promising solution for reducing aviation-related emissions. Notably, biomass-based fuels stand out as the only renewable energy source capable of actively capturing CO₂ during their lifecycle. This study estimates the production capacity of SAF for each EU member state and the EU-27 as a whole while assessing the extent to which conventional Jet A-1 fuel could be replaced. The analysis aims to underscore the role of SAF in achieving the ReFuelEU Aviation targets by 2050. In this study, four different feedstocks from agriculture and forestry were used for SAF estimation, which is derived from an innovative solar-assisted thermal fast pyrolysis process, which converts waste biomass feedstocks into bio-oil. Bio-oil further needs intermediate upgrading processes to refine it before it can be used as aviation fuel. To enhance its stability and energy content, the pyrolysis oil undergoes slurry hydrotreatment and hydrodeoxygenation (HDO), upgrading it into renewable crude, which is subsequently refined into SAF and other valuable co-products. By evaluating SAF production potential across the EU-27, this study provides key insights into the feasibility of replacing fossil-based Jet A-1 fuel with sustainable alternatives. The findings support the broader goal of carbon-neutral aviation, reducing dependency on fossil fuels, and advancing the EU's commitment to a sustainable energy transition in the aviation sector.