Heathrow Terminal 1 will handle its final flight tonight, closing the doors on 47 years of aviation history.
The final departure from the terminal will be British Airways flight BA0970 to Hannover, which is scheduled to take-off at 2115.
Opened by Queen Elizabeth II in May 1968, the terminal is closing as airlines complete their move to the newly revamped Terminal 2, which will be extended to boost capacity.
Heathrow said if the government supports a third runway then T2 will be extended further.
Heathrow chief executive John Holland-Kaye said: "The closure of Terminal 1 marks another important milestone in the transformation of Heathrow.
"Terminal 1 has served Britain well for nearly 50 years, but will soon make way for the expansion of Terminal 2, giving Britain a world class airport that we can all be proud of."