Czech Airlines has cancelled more than half of the Airbus A320neos it originally ordered more than three years ago, while Norwegian has also trimmed its A320neo commitment.
The Czech flag-carrier has cut four of the seven twinjets it ordered in March 2016, the airframer's latest backlog revision indicates.
Its A320neo order had, in turn, replaced seven A320s which were still outstanding from a previous agreement.
Czech Airlines still has three of the re-engined type on order. No engine selection has been disclosed.
Norwegian has cut five A320neos from its own backlog, the Airbus figures reveal. They had been part of the original order for 100 A320neo-family aircraft placed in mid-2012.
It takes the number of A320neos for the airline down from 63 to 58 – all of which have yet to be delivered – while its A321neo total remains at 30.