Exact procedures vary by jurisdiction, but jails generally use a bus or a van accompanied by cars to transport inmates. Rendition aircraft are used on occasion, but only for extremely dangerous prisoners.
Inmates need transportation between facilities to appear in court, for medical appointments, to attend funerals and in cases of extradition from one jurisdiction to another. Transport between facilities is often done with a bus that makes regular runs. In cases of transportation to and from court dates or other locations other than a correctional facility, prisoners are often transported in the back of a patrol car or van. The car or van may also be accompanied by one or more marked or unmarked police vehicles in case of emergency.
Extradition is often done by plane if a long distance has to be covered, but prisoners are usually placed on regular commercial flights and accompanied by officers. They generally travel in handcuffs and leg shackles. Private jets are only used when prisoners are considered extremely dangerous. The Justice Prisoner and Alien Transportation System maintains a fleet of 10 planes for this purpose. The planes can carry from six to 140 prisoners, and they generally have multiple guards on board.