In a first quarter trading update, Heathrow revealed Q1 passenger numbers fell 18.3% to 14.6 million, while April passenger numbers are expected to come in 97% down on last year.
"We expect passenger demand will remain weak until governments around the world deem it safe to lift travel restrictions," said the airport, adding daily passenger numbers "have shrunk to the thousands".
Heathrow chief executive John Holland-Kaye has meanwhile called on the UK government to lead talks over a set of "international standards" for safe air travel fit for the post-coronavirus world.
