The airport handled nearly 84.5 million passengers during 2025, it said.
That is up slightly on 2024.
It warpped up the year with a record 7.2 million passengers in December 2025.
In fact, it set records in nine out of 12 months and also recorded its busiest ever single day on 1 August with more than 270,000 fliers.
Aircraft movements was also a record high with 477,883 during the year.
“December’s record-breaking performance shows the strength of demand for Heathrow and the benefit to passengers of the great service our colleagues are providing,” said Heathrow CEO Thomas Woldbye.
“Last year, there was no hub airport in Europe that was more punctual than Heathrow”