making a list of Durontos that were Cancelled Permanently/Extended/Short Terminated/, if anyone knows more durontos, kindly put them in the replies and ill update it
1)12259 Sealdah New Delhi AC Duronto Express
Extended to Bikaner On 24th February 2020
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2) 12239 Mumbai Central Jaipur AC Duronto Express
Extended to Hisar on 17th August 2021
3) 22205 Chennai Central - Madurai AC Duronto Express
Permanently Cancelled from 08th June 2020
and Replaced with 20601/02 Chennai Madurai AC Express
4) 12267 Mumbai Central - Ahmedabad AC Duronto Express
First Extended to Rajkot on 27th May 2018
Later Extended to Hapa on ????
5) 12275 Allahabad - New Delhi Duronto Express
Later Converted to
Prayagraj - New Delhi Humsafar Express on 14th September 2019
6)12243 Chennai Central - Coimbatore Duronto Express
Converted to Shatabdi Express on 22 November 2013
7) 12847 Howrah - Digha AC Duronto Express
Converted into Shatabdi on February on ???
later converted into Super AC on 1 December 2015.
(Note: Currently Stands Cancelled.)