Heathrow has consolidated all passenger flights at Terminals 2 and 5 from Sunday 3 May 2020.
Over the past few weeks airlines have been progressively transferring flights from Terminals 3 and 4 to Terminal 2. American Airlines has since moved to Terminal 5. Qatar Airways and Japan Airlines will move to Terminal 5 from 27 & 29 July.
Terminal 3 has closed. Terminal 4 closed to passenger flights on Sunday 3 May.
The last airlines to transfer flights from Terminal 4 to Terminal 2 did so on Sunday 3 May. These are Air France, Air Malta, Alitalia, El Al, Etihad Airways, Kenya Airways, KLM, Kuwait Airways, Korean Air and Malaysia Airlines.
This means that all airlines other than American Airlines, BA and Iberia now operate from Terminal 2.
Rail services to Terminal 4 are suspended from Sunday 8 May.
No date has been given for the reopening of Terminals 3 and 4. Heathrow airport says Terminal 3 may reopen later in 2020 depending on how demand recovers in the autumn. Some airlines such as Virgin Atlantic will be keen to move back to Terminal 3 due to the infrastructure they have in place there.
It’s plausible that this may prompt a reorganisation of airlines at Heathrow. Some airlines may leave Heathrow permanently. Heathrow airport say Terminal 4 will not reopen until 2021 at the earliest. It is not an easy terminal to operate from due to its location, and could be mothballed for some time, if not permanently closed.
For completeness, here is a list of all the confirmed airline moves from Terminals 3 and 4 to Terminal 2:
Beijing Capital Airlines
China Eastern Airlines
China Southern Airlines
Finnair (moves to Terminal 5 on 15 August)
Japan Airlines (moves to Terminal 5 on 29 July)
Middle East Airlines (MEA)
Pakistan International Airlines
Qatar Airways (moves to Terminal 5 on 27 July)