Yes, Spirit Airlines allows passengers to carry a pillow on board their flights. Pillows are considered personal items and can be brought on the plane as long as they meet the airline's size requirements for personal items.

On Spirit Airlines in 2026, a standard neck or travel pillow is generally not counted as your one free personal item, provided it is being carried or worn around your neck. However, if you are bringing a full-sized bed pillow, the rules become stricter. A large pillow that does not fit inside your personal item bag (which must be 18 x 14 x 8 inches or smaller) may be classified as an additional carry-on, which incurs a significant fee. To avoid charges, it is recommended to use a compressible travel pillow or a "stuffable" pillowcase that can be filled with clothing. Spirit’s policy prioritizes the "sizer box" dimensions; as long as your pillow can be stowed under the seat with your bag or worn during boarding without appearing to be a separate piece of luggage, you likely won't be charged. However, gate agents have the discretion to flag oversized pillows as a second item, so tucking it into your backpack during the boarding process is the "gold standard" strategy for a fee-free flight.