Austria and France have successfully reduced domestic aviation emissions by promoting train travel as an alternative to short-haul flights, with Austria seeing a 22% decrease and France experiencing a 16% decline in emissions. Studies show that replacing short-haul flights with rail alternatives in Europe could lead to a reduction of up to 97% in emissions. Implementing broader policies to substitute rail for domestic flights under 500 miles could slash 40% of Europe's domestic aviation emissions and potentially reduce over 91 million tonnes of annual emissions globally. While some airlines are competing with rail lines, the transition to a lower-carbon aviation future is still in progress.