This literature review revealed a total absence of research on the sleep of economy class passengers, although there was some research relating to their general health or well-being, for example, the impact of air quality on passenger well-being. (All sleep research focused on flight crew.) Therefore, to be able to make suggestions about the possible impact of factors on the sleep of passengers, literature from other environments was often considered.

It was concluded that it is reasonable to expect that the sleep of economy class passengers could be improved by lowering cabin altitudes, ensuring that temperatures remain within the range of thermal comfort throughout the flight, minimising noise events, and improving seat design.