Dubai - On November 15 at the Dubai Air Show Airbus announced the signing of a Memorandum of Understanding with Indigo Partners on 430 A320neo and A321neo. The aircraft are destined for four low-cost US investment airline operators: Frontier Airlines (USA), JetSMART (Chile), Volaris (Mexico) and Wizz Air (Hungary).

This is the largest order that Airbus has received in its history.

With the new agreement, Indigo Partners Group becomes one of the main customers of the Airbus family of single-aisle aircraft.

This purchase commitment, which remains to be finalized, includes 273 A320neo and 157 A321neo. The value of the agreement is estimated $ 49.5 billion at list prices.

Indigo Partners' airlines have already placed orders for 427 A320 family aircraft. With the new agreement, the group becomes one of the main customers of the Airbus family of single-aisle aircraft.

"This significant commitment to 430 additional aircraft underscores our optimism about the growth potential of our family of low-cost airlines, as well as our confidence in the A320neo family as a platform for this growth," said Bill Franke, the chief executive officer at Indigo Partners.

The distribution of aircraft between the four airlines is already planned. Wizz Air will receive 72 A320neo and 74 A321neo; Frontier Airlines, 100 A320neo and 34 A321neo; JetSMART, 56 A320neo and 14 A321neo; and Volaris, 46 A320neo and 34 A321neo.

Bill Franke said the engine selections will be announced at a later date.

"An order for 430 aircraft is outstanding, but it is particularly rewarding for Airbus when it comes from a group of aviation professionals who know our products," said John Leahy, Chief Operating Officer of Airbus Commercial Aircraft Sales Manager, who signs his and Airbus' biggest contract a few weeks before his retirement.

Airbus has already won more than 5,200 firm orders for the A320neo family, from 95 customers. Of this total, 180 aircraft, including 167 A320neo and 13 A321neo were delivered at the end of October 2017.