The announcement comes five months after the airline made public its intent to buy 50 ATR turbo-prop planes worth USD 1.3 billion to tap the regional aviation market and signed a term-sheet with Avions de Transport Regional GIE (ATR) for the purchase.
The airline has also launched introductory fares starting Rs 999 on these new routes and bookings open from midnight tonight.
"First ATR flight will commence from Hyderabad, starting December 21st, 2017," IndiGo said in a statement.
The airline will also begin ATR operations in its existing network of Chennai, Bengaluru, Mangalore, Madurai and Nagpur.
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The 74-seater aircraft will also operate to two new tier-2 cities of Tirupati and Rajahmundry, IndiGo added.
The airline will be deploying its fleet of ATR 72-600 aircraft "in a phased manner" in order to connect these cities.
The bidding for the second phase started in August and will conclude by October 26.
IndiGo is expecting to induct up to seven ATR aircraft by March 2018 and 20 planes by December 2018.
IndiGo currently has a fleet of 140 Airbus A320 aircraft.
IndiGo is only the third scheduled carrier after Air India and Jet Airways to have ATR planes in its fleet.
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