Heathrow is set to consolidate its operations into Terminals 2 and 5 over the coming weeks.
The airport said March passenger numbers were down 52% year-on-year, as the UK entered lockdown.
Many of the three million journeys made were repatriations.
Heathrow Airport said that the situation is expected to continue as initial forecasts show passenger demand in April down 90%, with ‘lasting and significant industry-wide effects’ predicted.
CEO John Holland-Kaye said: “Heathrow continues to serve the nation by keeping vital supply lines open, and helping people get home. Now is the time to agree a common international standard for healthcare screening in airports so that when this crisis recedes, people can travel with confidence and we can get the British economy moving again.”
