There is no rule in 2026 that prohibits you from wearing slippers at the airport, and they have actually become a popular choice for "airport style" due to their comfort on long flights. However, there are practical reasons to be cautious. First, as of July 8, 2025, the TSA has officially ended the requirement for most passengers to remove their shoes at U.S. checkpoints, but they may still ask you to remove "thick-soled" or "bulky" footwear—which includes many types of slippers—for additional screening. Second, slippers often lack the durability and grip needed for the miles of walking required in modern terminals. Third, airport floors and airplane lavatories are notoriously unhygienic, and many slippers have thin, porous soles that can absorb liquids. If you do wear them, look for "outdoor-sole" slippers or simply pack them in your carry-on to change into once you are safely in your seat.