Opened as Hounslow Barracks) by the District line, renamed 1 December 1925; first served by the Piccadilly line 13 March 1933, resited 19 July 1975map 35
Opened as Heathrow Central; renamed Heathrow Central Terminals 1, 2, 3 on 3 September 1983; renamed Heathrow Terminals 1, 2, & 3 on 12 April 1986; renamed Heathrow Terminals 2 & 3 in January 2016map 38
Just beyond Heathrow Terminals 2 & 3 tube station, the line goes into a new section to serve ایستگاه ترمینال ۵ هیترو, which opened in March 2008. Half of all Heathrow trains use the loop and serve Terminal 4 and the other half omit Terminal 4 and serve Terminal 5.[۲]
Originally the District line; first served by the Piccadilly line 23 October 1933 (from here to Uxbridge trains share track with خط متروپولیتن، and some trains terminate here)map 47
Originally the District line; first served by the Piccadilly line 23 October 1933; renamed Hillingdon (Swakeleys) April 1934; the suffix was later dropped; closed when re-located 5 December 1992; re-opened 6 December 1992map 52
Terminus. Originally the District line; first served by the Piccadilly line 23 October 1933; closed when re-located 3 December 1938; re-opened 4 December 1938map 53
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Croome, Desmond F. (1998). The Piccadilly Line – An Illustrated History. London: Capital Transport Publishing. ISBN1-85414-192-9.
Horne, Mike (2007). The Piccadilly Tube – A History of the First Hundred Years. London: Capital Transport. ISBN978-1-85414-305-1.
Lee, Charles E. (1966). Sixty Years of the Piccadilly. London: London Transport.
Lee, Charles E. (1973). The Piccadilly Line: a brief history. London: London Transport. ISBN0-85329-042-3.
"Piccadilly line facts". London Underground — Key Facts. Transport for London. Archived from the original on 10 February 2014. Retrieved 12 April 2011.