An Indian low-cost airline has placed an order with European aircraft maker Airbus for 300 planes.
This marks one of its largest ever orders with a single airline operator.
The IndiGo order is made up a mix of A320neo, A321neo and A321XLR aircraft.
This will take the airline's total number of A320neo aircraft orders to 730.
IndiGo is among the fastest growing carriers in the world.
The company says it is India's largest passenger airline, with a market share of 48.2% as of September 2019.
It primarily operates in India's domestic air travel market as a low-cost carrier.
It flies to 60 domestic airports and has 23 international destinations.
Fourteen of these are codeshare destinations through Istanbul with Turkish Airlines.
Since its first aircraft was delivered in March 2016, its fleet has grown into 97 A320neo aircraft, operating alongside 128 A320ceos.
Ronojoy Dutta, chief executive officer of IndiGo, says: "This order is an important milestone, as it reiterates our mission of strengthening air connectivity in India, which will in turn boost economic growth and mobility.
"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".
Guillaume Faury, Airbus chief executive officer, adds: "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."
The cost of the order has been put at more than €29.8bn at catalogue prices.
Airbus says at the end of September, the A320neo had received more than 6,650 firm orders from nearly 110 customers worldwide.
The company has operations in France, Germany, Spain, the UK, Russia, Turkey, Finland and Romania.