I learned that lesson the hard way when AZ lost my luggage for a few days. The only lingerie stores near where I was staying in Milan were Victoria's Secret type places. Couldn't come near finding anything in a large enough size with any support (TMI?). Just teeny, tiny bits of nylon for women with teeny, tiny boobs, I guess. Nothing for me.

Now I never fly without a few bras in my carry-on bag, as well as anything else of value (jewelry, electronics, documents, etc.), which I would never put in checked luggage, anyway.