The airport said on Monday that its annual cargo volumes also fell 28% as fewer passenger planes meant there was less space available for goods.
For December, Heathrow said that passenger numbers plunged 83% as the new strain of COVID-19 led to countries restricting travellers from Britain and millions of passengers were forced to cancel plans.
The numbers capped off a dismal year for the UK hub, which in October lost its title as the busiest airport in Europe to Paris-Charles de Gaulle.
(Reporting by Sarah Young, Editing by Paul Sandle)
