* Half an hour to go to the airport
* Half an hour passing security and waiting for boarding
* 20 minutes between boarding and stable flight when you can start working on your laptop
* One hour and 40 minutes when you can work cramped in a noisy environment with terrible air quality
* 15 minutes descent and landing
* 15 minutes deboarding and getting out of the airport
* Half an hour to get where you need to be
Same trip by train:
* Half an hour till you are on the train
* 3 hours working comfortably in a usually bigger space with ground level air pressure and very little noise
* Half an hour to get where you need to be.
Travel in reasonably modern trains is by far the best kind of business travel you can have today, IMO.