First introduced in 2017, the British Airways boarding process involves ranking passengers based on status and cabin class. Those with higher status or those travelling in premium classes board first; those with lower status or travelling in economy board later.

British Airways utilizes a strictly managed boarding group system consisting of nine numbered groups to ensure an orderly process. Boarding begins with "Pre-boarding," reserved for families traveling with infants under two, young children in strollers, and customers requiring disability or mobility assistance. Following this, Priority Group 1 includes First Class passengers and top-tier elite members (Executive Club Gold and Oneworld Emerald). Groups 2 and 3 follow for Business Class, Premium Economy, and mid-tier elite members. Groups 4 through 9 are for Economy (World Traveller) passengers, often organized from the back of the plane forward or by seat type. In 2026, passengers on "Basic" or "Hand Baggage Only" fares are typically assigned to the very last groups, meaning overhead bin space may be limited by the time they board. It is crucial to check your digital or paper boarding pass for your specific group number and wait for it to be called by the gate agents to avoid being turned back.