The west London airport says the flight cancellations and disruptions are to support ceremonial aspects for Queen Elizabeth II’s state funeral at Westminster Abbey and the committal service at Windsor Castle.

"As a mark of respect, operations to and from the airport will be subject to appropriate changes in order to avoid noise disruption at certain locations at specific times on Monday," Heathrow said in a statement on its website.

Sky News reported that 180 flights will be affected, with more than 100 of those being cancelled.

There would be no aircraft movements between 11:40am and 12:10pm Monday, around the two-minute silence at the end of the funeral, no arrivals at Heathrow between 1:45pm and 2:40pm, no departures between 3:05pm and 4:45pm, as well as a reduced number of flight departures between 4:45pm and 9pm during the committal service, it said.

Heathrow tweeted that affected passengers would be contacted directly by their airlines.

Reuters quoted British Airways as saying it is cancelling 50 round-trip short-haul flights from Heathrow on Monday while its flights from Gatwick and London City airports would operate as planned. 

Up to a million mourners are expected to descend on London for the Queen's funeral, with queues to see the monarch lying in state in Westminster Hall reportedly reaching 14 hours on Friday.

Transport for London is closing Westminster, St James's Park and Hyde Park Corner Underground stations for much of Monday morning, according to the Daily Mail, while buses would pull over if possible to observe the two-minute silence.