Earlier quoted context omitted.
No it does not.if it is faster to fly most people will choose to fly.
Not if the speed comes with a price tag that properly accounts for externalities. Cheap flights are a market failure, plain and simple. Besides, on short flights the relative overhead of getting to/from the airport, and spending time on the airport waiting, is especially high, whereas with trains the overhead is minimal.
Could you explain this? I'm struggling to understand how something becoming very cheap can be considered an (economic) failure? Isn't that something the market optimizes for?
EDIT: Perhaps you mean expensive rail is a market failure?