Lufthansa Group has converted options on 24 Airbus A320neos and three A321neos into firm orders for delivery in 2023-4.
Disclosing the deal, the group says it is "reacting to the positive market and earnings development".
The options' conversion brings to 149 the total number of A320neo-family jets to which the group has firmly committed. Lufthansa already has 13 A320neos in service, Flight Fleets Analyzer shows.
Ten of the 27 newly firmed aircraft are intended for Swiss, says Lufthansa. It does not specify how the remainder will be shared among group's other operators.
Some of the aircraft will be powered by Pratt & Whitney PW1100G engines and some with CFM International Leap-1As, says Lufthansa, without giving a split. But it does indicate that the two engine types will equip "roughly equal proportions" of its Neo fleet.