More than 80,000 respondents to a poll carried out by low-cost carrier Ryanair said they would stand on short-haul flights if it meant their fare was free.
The Irish airline regularly runs polls on its website asking people for their views on issues relating to air travel.
Of the 120,000 people who responded to the most recent survey, 66 per cent indicated they would be happy to stand on flights of up to one hour, provided their fare was free.
People were also polled on two other questions, with 42 per cent saying they would be happy to stand if their fare was half that of a seated person, and 60 per cent saying passengers should have the option to stand on short-haul flights, as they currently do on other forms of public transport.
Ryanair's spokesman Stephen McNamara told marketwatch.com that the airline envisaged "vertical" seats, where passengers could be supported and restrained by seatbelts during takeoff and landing.