When I travel out of state for work I always like to travel by train.
I am not a fan of having to take planes because let’s face it, it just gets way too cramped and half the time their heating and a/c does not work well, then on a train, or at least the ones I have been on the heating and a/c is good just like a hotel.
I always get a sleeper van if I am actually going a long distance to make a mini holiday out of it. and always experiencing good heating and a/c on trains I can also say that the air quality has been great too considering what you usually would expect from traveling by train. I always will spend the money to travel this way even if the company I work for is paying for airline tickets. I simply tell them how I know about airplanes and will not travel on them, so yeah, I have to spend money extra money traveling this way, however but it is all actually worth it just to like full indoor comfort from perfect a/c or heating along with the top notch air quality that I always acquire on a train. I would never want to trade this in for anything in the whole wide world. However if there ever came a time where the heating and a/c stopped being superb and the air quality got bad I would really just travel by plane.