The longest train journey in the EU

Anyone who has been following my work for a while knows I have long had a rather abstract discussion about the definition of the World's Longest Train Journey. I started calculating this back in 2021, after an incorrect map on Reddit went viral, and have updated my thoughts about it since in this post.But both the world's longest, and even Europe's (as a continent) longest rail trips go through Russia, and you should not go there, here is an alternative and slightly easier challenge: the longest train journey in the EU. And importantly this is new for 2026.Definitions of the longest train journey in the EUThere are only two definitions that sort of make sense.The simple and boring one is the most route-km on one single train - that is for the moment 1444.9km on the SJ EuroNight Stockholm - Berlin, although this could be surpassed were night trains to be extended to Riksgränsen in northern Sweden some time again in the future.The more interesting one that concerns me here is the two…