"Why are flights in the UK so often cheaper than taking the train?"

Some of the reasons are nonsensical:
for trains:

"The fuel is subject to VAT at 5% on diesel and 20% on electricity.".

this should be the reverse?!?

for planes:

"Fuel accounts for a much bigger part of airlines’ costs, but they do not have to pay VAT or duty on it.".

whyyyy??
https://www.theguardian.com/lifeandstyle/2025/nov/19/why-are-flights-in-the-uk-so-often-cheaper-than-taking-the-train

#SaveThePlanet and tax planes in proportion of the damage they do to their environment!

Why are flights in the UK so often cheaper than taking the train?

The environmental costs of flying are much higher, and the government subsidises rail travel, so what explains the baffling price difference when travelling domestically?

The Guardian

@elduvelle @albertcardona Moreoever, why is it that there are direct flights between cities in the UK that I need eight changes on the train and a dozen little bus trips for?

With each change likely to fail at a rate of 10% that gives me a less than 50% change of reaching my destination…

Airplane it is.

@jonmsterling @elduvelle

This summer I have to go from Barcelona to Berlin. The non-flight options are ... insane. I wouldn't mind a 24-hour trip by train, but it's not even that*. Many legs, no coordination between providers, subways and buses included. I am not a XIX century naturalist crossing uncharted territory, I am crossing the European Union from South to somewhat North. It's embarrassing.

* I was hoping for a 2-leg train, i.e., Barcelona-Paris and Paris-Berlin in the same day, but no, that would require me sleeping in Paris! The lack of coordination is as astonishing as it is appalling.

@albertcardona @jonmsterling @elduvelle how many people do need to depart from Barcelona to go to Berlin? I guess not that many, even if the trains are direct. Train needs mass to be efficient compared to car or plane.
@erwaks Cheap planes also need masses, otherwise they are subsidized. @albertcardona @jonmsterling @elduvelle
@NatureMC @albertcardona @jonmsterling @elduvelle the critical mass for a plane is 100 people per day, you can allocate the plane to another trip if needed
The critical mass for train is 600 people per train, with no choice but to run a lot of train to pay for the investments on the tracks