In its second major announcement at the Paris Air Show, Airbus has announced that Virgin Atlantic is to acquire 14 A330-900 aircraft.

Virgin Atlantic Chief Executive Shai Weiss said at a press conference Monday it was the airline’s “biggest ever fleet transformation,” and that by 2025 the Virgin fleet would have halved its average age.

The list price for the contract was $4 .1 billion dollars, although it is estimated that Virgin negotiated a much cheaper deal. The commitment from Virgin was for eight aircraft from Airbus and six additionally leased from Air Lease Firm.

U.S. organization Delta Airlines owns 49% of Virgin Atlantic and Weiss stated the firm had input into the purchase decision.

Weiss added that the order of the A330neo airplane will replace Virgin’s A330ceos from 2021 and was a portion of an approach to double its fleet size flying out of Heathrow.

Earlier on Monday, Airbus announced the launch of a long-range, single-aisle airliner. The firm also announced that it decided to sell 100 planes to the U.S. plane lessor Air Lease Corporation.