A jump seat on an airplane is an auxiliary seat for individuals who are not normal passengers and are not operating the aircraft. In general, the term "jump seat" can also refer to a seat in other vehicles, such as pickup trucks, that is mounted against the side or rear wall of the cab interior and can fold up when not in use to create more interior storage space. In airplanes, jump seats are officially termed auxiliary crew stations and can be located in the flight deck or the passenger cabin.

• Cockpit Jumpseat: In the cockpit, jump seats are provided for individuals who are not operating the aircraft, such as trainee pilots, off-duty crew members in transition to another airport (see deadheading), government officials (such as Federal Aviation Administration staff), or airline staff.

• Passenger Cabin Jump Seat: In the passenger cabin, jump seats are used by the cabin crew, especially during takeoff and landing. These jump seats are normally located near emergency exits so that flight attendants can quickly open the exit door for an emergency evacuation. The passenger cabin jump seats usually fold out of the way when not in use to keep aisles, workspaces, and emergency exits clear.

Jumpseating is a procedure in which an additional crew member, such as another flight attendant or a pilot, occupies the jump seat of an aircraft during flight. The additional crew member must be certified to use the jump seat and has to be properly briefed on the rules and regulations governing its use. Jumpseating is typically done when there is an imbalance in the number of flight attendants.