On most long-haul flights the only praying that goes on is in a last ditch effort to prevent the plane crashing into something.
This could all become much more organised, however, as Israeli airline El Al is planning to introduce synagogues into several new planes.
Orthodox Jews are required to pray three times a day, standing up. This has led to groups congregating at the back of planes during flights to fulfil their religious obligations.
The design of the new Airbus A340 range of aircrafts will have space under the deck for a shop, bar or beds. However, El Al plans to put an Ark there, no, not a re-enactment of that biblical menagerie, but a chest forming the centrepiece of a synagogue.