Originally Posted by Concordia
But who wears suits just to get on an airplane today?
I wear a sports jacket just to get on an airplane -- I can put all my metallics in its pockets (change, wallet, phone, keys) and it's easier to manage than a sweater for a plane that's too hot or too cold.
To answer the question, I think light tan cotton is undeniably summer and light tan wool is summer or spring (like light gray, it just doesn't transition very well to autumn). That being said, a tan/brown tweed suit looks great in autumn and all the way through most of winter.