Power-to-Liquid (PtL) technology converts renewable electricity into liquid fuels and offers a sustainable alternative to fossil fuels. In the first step, water is split into hydrogen (H₂) and oxygen (O₂) through electrolysis using exclusively renewable electricity. The resulting hydrogen is then combined with carbon dioxide (CO₂), which is either captured from industrial emissions or directly removed from the atmosphere using Direct Air Capture technologies. Through catalytic synthesis processes such as Fischer–Tropsch synthesis or methanol synthesis, a synthetic intermediate is produced that can subsequently be refined into fuels such as kerosene. These fuels are considered nearly carbon-neutral because their combustion releases only the CO₂ that was previously captured. PtL technology therefore contributes to replacing fossil energy carriers and reducing dependence on crude oil. Current challenges include high production costs and the substantial energy demand of electrolysis. Nevertheless, PtL is regarded as one of the most promising solutions for drastically reducing greenhouse gas emissions in aviation. With increasing scale and supportive policy frameworks, these synthetic fuels could play a key role in the global energy transition.