This would be the first time that the leading carrier would be acquiring ATR 72-600 planes, which generally have a seating capacity for 70 people.
While announcing the quarterly results today, IndiGo said it has signed a term sheet with Avions de Transport Regional GIE (ATR) for purchasing 50 ATR 72-600 aircraft with the "flexibility to reduce the number of aircraft deliveries based on certain conditions".
The term sheet is subject to reaching a mutually satisfactory final purchase agreement with ATR and the engine manufacturer, it said in a release.
IndiGo President and Whole Time Director Aditya Ghosh said that in support of UDAN mission, "we are embarking on a journey to build a nation-wide regional network and connect cities that have not benefitted from the growth in Indian aviation".
The government's UDAN (Ude Desh ka Aam Naagrik) scheme seek to connect un-served and under-served airport as well as make flying more affordable to the masses.