Air Macau is to lease three more Airbus A321neos from late next year, under a fleet-modernisation plan.
The airline is to take the aircraft from AerCap, the Irish-based lessor states, with the first arriving in November 2020.
Air Macau will receive the other two aircraft by October 2021.
The Asia-Pacific carrier already operates the smaller A320neo and has previously signed for a pair of A321neos from Air Lease.
Air Macau increased its commitment to the re-engined aircraft family during a ceremony to mark the airline's 25th anniversary.
No engine selection has been disclosed but the A320neo fleet is powered by Pratt & Whitney PW1100Gs and Air Macau's other Airbus single-aisle jets are fitted with International Aero Engines V2500s.