A sporran is a useful place to put things as a kilt has no pocket. Also sporrans are worn decoratively and they also help the kilt from blowing up in the wind.
Scottish Gaelic for purse
Scotland. The sporran is a small leather bag worn at the front of the kilt.
I imagine you can, no reason why you can't wear formal scottish attire on any plane I can think of. But I could be wrong.
One can find out more information about Kilt Sporran on the Kilt Sporran website. One can find many kinds whether one's looking for leather, dress, semi dress or piper sporrans.
A sporran
sporran
Sporran!
I personally would wear something red.
A Sporran (Scottish Gaelic for purse), is a pouch that is worn with a Kilt. It takes the place of pockets because a Kilt doesn't have pockets. Sporrans also prevent the kilt blowing upward.
scotland
I presume you mean the Sporran which is worn with the kilt. And let me take this opportunity to clarify that kilts are worn only on special occasions, mostly weddings and the occasional funeral. It is NOT casual wear, I assure you.