In 2026, sleeping on the floor of a plane is strictly prohibited by nearly all commercial airlines for safety and hygiene reasons. Even if you have an empty row or a bulkhead seat with extra floor space, flight attendants will promptly ask you to return to your seat. The primary concern is turbulence; if the plane hits an unexpected air pocket, a person on the floor can be tossed against the ceiling or seats, causing severe injury to themselves or others. Furthermore, in the event of an emergency evacuation, a body on the floor becomes a lethal tripping hazard that could block the aisle for dozens of other passengers. From a hygiene perspective, airplane carpets are notoriously unsanitary, often harboring bacteria and residue that you wouldn't want to lie in. For 2026 travelers seeking a "lie-flat" experience on a budget, look for airlines like Air New Zealand that offer "Skycouch" options, as the floor is a non-starter for the flight crew.