I've been kilted when flying only on two trips and had two vastly different experiences.

The first time I was wearing a traditional kilt and flying Edinburgh to Spain, 20 minutes being "patted down" and nearly missing my flight. I actually ran into the plane carrying my boots I was that late! Flying home the Spanish guys didn't bother me in the least.

The second journey Inverness to Luton I was wearing a Utilikilt Mocker, guy looked at me and said "nice kilt" and that was me, flying home in a traditional kilt the lady at the metal detector asked if I could take off the little straps at the sides, once I explained they were holding my kilt up she went pink and let me go.

I have my kilt looked out for tomorrow and I'll let you know how customs treat me in Aberdeen and Amsterdam for my connection to Chicago