Airbus SE said this week it had completed a record-setting order for 430 jets from four airlines.  These four airlines are linked to a U.S. private-equity firm.  This one announcement narrows the gap opened up by rival Boeing Co. on new plane deals in 2017.

The European plane maker booked the order first outlined at last month’s Dubai Airshow for A320neo family jets.  These 430 jets are destined for carriers linked to Indigo Partners LLC: Frontier Airlines in the U.S., Hungary’sWizz Air Holdings WIZZ PLC, Mexico’s Volaris and JetSmart, a new Chile-based carrier.

The sale is the biggest-ever bulk buy of planes in terms of aircraft number, with the jets carrying a list price of $49.5 billion before discounts that analysts estimate could run as high as 60%. Airbus and Indigo didn’t disclose the actual terms.