Yes, you are absolutely allowed to carry a pillow on a plane in 2026, but how it is treated depends on the airline's bag policy and the pillow's size. Most major airlines allow a small travel or neck pillow to be carried in addition to your personal item and carry-on bag at no extra charge. However, if you bring a standard full-sized bed pillow, many budget carriers like Spirit or Frontier may consider it your "personal item" or even an additional carry-on bag if it does not fit inside your existing luggage. To avoid fees, many travelers use the "pillowcase hack"—stuffing a pillowcase with extra clothes to save space—though some gate agents have become wise to this trick and may require you to cram the pillow into the "sizing bin." For international long-haul flights, airlines like United and Delta still provide complimentary pillows in most cabins, but for domestic hops, bringing your own is often the only way to ensure comfort. If your pillow is particularly large, it is best to secure it to the outside of your backpack or carry-on to ensure it doesn't count as a separate "loose" item during the boarding process.