A range of methods is being trialled at the West Sussex airport to discover whether they make the boarding process faster and more relaxing.
One sequence involves seating people from the back row to the front row with window seats first, followed by middle seats and then aisle seats.
Gatwick believes it is possible to reduce the time it takes to board a typical short-haul flight by between three and 14 minutes.
The two-month pilot is being carried out in the North Terminal on Airbus A320 aircraft with six seats across.
Passengers who have booked priority boarding or those who require special assistance will continue to board planes first.
The UK's second busiest airport will consider the impact of the new methods and feedback from passengers before deciding whether to continue with the concept after the pilot scheme ends.
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