Uniform
The QEA ( Qantas Empire Airways ) uniform that John Travolta is wearing is one of the type that the Captains wore ( and hence of the airline's B707-138B era ) until the late sixties. The white hat with QEA crest, and double breasted jacket, were then replaced by the blue hat and single breasted jacket.
Although the airline's fleet started wearing the QANTAS titles from 1952 ( on the L749s ), the airline's name did not officially change from QEA to Qantas Airways Ltd. until August 1967, hence the uniform.