Heathrow marked two years of consecutive record monthly volumes in October.
The school half-term bolstered growth of 4.4% to almost seven million passengers over the same month last year. This gave a an annul rolling total up 2.7% to 79.7 million.
The increases in passenger numbers last month were helped by airlines using larger and fuller aircraft, according to the London hub.
North America flights led the growth, up by 9.1%, as October saw various NFL American football, teams travel to Heathrow to play for match fixtures at Wembley stadium.
October marked the first anniversary of Heathrow’s Living Wage accreditation.
CEO John Holland-Kaye said: “We are proud to have been Living Wage accredited for the last 12 months and would encourage other businesses to do the same.
“When colleagues earn enough to support their families, they provide better customer service and this has contributed to record numbers of passengers choosing to travel through Heathrow this year.”