There are currently 6 luggage stores in the Frankfurt Airport that carry Longchamp, duty free. This…read morelisting is for the store in the Z concourse, which has signage stating "Samsonite" on its right half, and "Longchamp" on its left half (both pay at a common register). This store is named "TheCollection@Frankfurt" on the airport directory website, however, my receipt states "ROLLING LUGGAGE," so there are varying names for this place. I have started a Yelp listing with the name "Samsonite Longchamp Store" because this is what the actual storefront states.
Before our trip, I researched the best places in Europe to buy Longchamp. That is, the best places in general, not necessarily duty free. Serendipitously, the Frankfurt airport was named many times on handbag forums, for the best deals on Longchamp. Sure enough, prices on the little bag I wanted, at this location in the airport, were cheaper than even discount stores at home. I bought one bag when I arrived, and loved it so much throughout my trip, I got another on my way home (stopped at the same store).
The selection was pretty good. They didn't appear to have every item possible, but had quite a lot just the same. They had more in the back too, so always speak up if you see something but prefer it in another color or size. You never know. Lots of sale items at the time I was there, mostly up front. Decent deals. Made it worth buying two bags instead of just one, in my case.
The first visit, Melanie helped me. I confirmed with her that the small size of the Le Pliage bags, are the only ones to have goldtone zipper pulls that match the goldtone snap on the leather flap. She was totally shocked to discover this. I was surprised that I knew this detail and the associate didn't. She was super-informed about everything else in the store, but did not know that the larger-than-small sized bags all have gray-black toned zipper pulls that clash with the goldtone snaps. For some odd reason, only the smallest size have goldtone pulls to match the snap. It was funny to watch Melanie go through all the bags. She kept wanting to see if the larger version in this color or that had goldtone pulls, and none of them did. She could not believe it. (Wish they made their bags match better.) Anyway, Melanie was really sweet and helpful.
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They normally offer, but if not, ask at the register (before you pay) about duty free paperwork. I was told my receipt had to be for €50 or more, to get 10% back on purchases, but I recommend researching this to be sure. It was not worth the time, in my case, to worry about the hassle.