Depends on how you define better. I don't mind planes but I hate the process of getting off and on a plane. There is no single best mode of transport. There are so many variables involved. Price, time, proximity, personal preferences,..

Trains are as close as you can get to frictionless travel. (Getting to space and back still means traveling through all that atmosphere at insanely high velocities.) That alone determines huge energy, and, by extension, carbon emissions, savings.

When flying accross europe, you spend so much more time in the terminals and going in and out of the airports you need to sometimes double or triple the time of the actual flight to get to your destination. This + the usual extorsion to buy drinks and a meal in and off the plane + potential need for a uber/taxi. It soon becomes less appealing, even more so when you can't get a direct flight.