Rail is very expensive to build, operate, and maintain. Rail is far more heavily subsidised in Europe than air travel and it’s still more expensive. It also doesn’t respond well to changes in demand. Tracks can’t be easily moved. Flights can easily be redirected. As technology and efficiency improves, flights become cheaper every year. Not rail, however, because most of the cost of operation and maintenance has nothing to do with energy efficiency. This gap will continue to widen. Further, rail has an inherent logistical limitation: all cars share limited lines. They are all limited by the slowest car. They are all stopped when an issue occurs with another car (or tracks). Planes can fly around damage to the network.
Hell, it’s cheaper and faster to fly from Zurich or Munich to Hamburg via Barcelona, London or Dublin.
You can actually read the study. Hamburg-Munich was in nearly all cases cheaper by train. Zurich-Hamburg they did not look at, but Zurich-Berlin was mostly cheaper as well.
But why though?
Rail is very expensive to build, operate, and maintain. Rail is far more heavily subsidised in Europe than air travel and it’s still more expensive. It also doesn’t respond well to changes in demand. Tracks can’t be easily moved. Flights can easily be redirected. As technology and efficiency improves, flights become cheaper every year. Not rail, however, because most of the cost of operation and maintenance has nothing to do with energy efficiency. This gap will continue to widen. Further, rail has an inherent logistical limitation: all cars share limited lines. They are all limited by the slowest car. They are all stopped when an issue occurs with another car (or tracks). Planes can fly around damage to the network.
Air travel is heavily subsidised, especially through very very very favourable tax rates on aviation fuel
I’m not sure it’s like this everywhere, but many airlines are more focused on financial products (like credit cards) for profit than flights. Here’s something about it, no guarantee of quality, but it’s enough to get the general idea: https://www.theatlantic.com/ideas/archive/2023/09/airlines-banks-mileage-programs/675374/