India-based low-cost carrier IndiGo has ordered 300 A320neo family aircraft from Airbus, increasing its total number of orders to 730.

The new order includes A320neo, A321neo and A321XLR aircraft.

Although the engine manufacturer for this order has not been finalised yet, IndiGo chief aircraft acquisition and financing officer Riyaz Peermohamed noted that the selection will be made later.

The airline took delivery of its first A320neo aircraft in March 2016. It currently operates a fleet of 97 A320neo aircraft and 128 A320ceos.

Airbus chief executive officer Guillaume Faury said: “We are delighted that IndiGo, one of our early launch customers for the A320neo, continues to build its future with Airbus, making IndiGo the world’s biggest customer for the A320neo family.

“We are grateful for this strong vote of confidence as this order confirms the A320neo family as the aircraft of choice in the most dynamic aviation growth markets.”

As of last month, Airbus has received more than 6,650 firm orders for the A320neo from 110 customers worldwide.

The A320neo is designed to offer fuel efficiency and help reduce operating costs for the carrier.

Launched in June, the A321XLR is an enhancement of A321LR and features a range of up to 4,700nm and increased payload.

The aircraft is also eco-friendly and offers a reduced 30% fuel consumption per seat.

IndiGo chief executive officer Ronojoy Dutta said: “India is expected to continue with its strong aviation growth and we are well on our way to build the world’s best air transportation system, to serve more customers and deliver on our promise of providing low fares and a courteous, hassle free experience to them.”

Earlier this year, CDB Aviation delivered the first of nine Airbus A321neo aircraft to IndiGo as a part of the purchase and leaseback deal.