Paris-Zurich is 4H, without any transfer, 5 times a day. (plus quite a few more of options under 5H with 1 ou 2 transfers) You are making better time by train,

Paris-Zurich is 4H, without any transfer, 5 times a day. (plus quite a few more of options under 5H with 1 ou 2 transfers) You are making better time by train, unless your actual destination was Zurich's airport instead of Zurich.