IndiGo has placed a firm order for 300 Airbus A320neo family aircraft, making it one of the largest orders Airbus has received from a single customer.

At list prices, the deal is worth at least $33 billion; however, being a long-time Airbus customer and a sufferer from A320neo engine issues, discounts were likely included.

Included in the order is the A320neo, A321neo and A321XLR, bringing IndiGo’s total order for the A320neo family to 730.

FlightGlobal, via Cirium, shows IndiGo has seven A321neos and 90 A320neos in service, with another 143 A321neos and 190 A320neos on order.

“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.”

Ronojoy Dutta, Chief Executive Officer of IndiGo

The order comes days after IndiGo announced its largest quarterly loss, following ongoing Pratt and Whitney Geared Turbofan engine issues. IndiGo elected to switch from Pratt and Whitney to CFM International in June with a $20 billion order for 600 CFM LEAP engines.

Despite this, no engine selection for the new order will be made until a later date.

IndiGo was one of the first set of airlines to purchase the A320neo in 2011, with an order for 180 aircraft. In 2017, Airbus secured a record order for unrelated Indigo Parnters for 430 A320neo Family aircraft.

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.”

Guillaume Faury, Airbus Chief Executive Officer

As of the end of September 2016, Airbus has secured 6,650 firm orders for the A320neo family for nearly 110 customers worldwide. This figure will be adjusted accordingly at the end of October.

Just days ago Spirit Airlines signed a memorandum of understanding for 100 A320neo family aircraft with purchase rights for an additional 50.