Indonesian flag carrier Garuda will add 50 Boeing 737 Max 8 narrowbodies to its fleet between 2017 and 2023.
The aircraft will replace 737-800s as leases expire, says the airline.
Flightglobal's Ascend Fleets database lists 75 in-service 737-800s within Garuda's fleet.
A deal for the Max jets was signed with Boeing last month, the carrier indicates.
"The fleet revitalisation programme is in line with the airline's effort to keep pace with the industry's rapid growth in both the domestic and regional market, as well as helping to sustain Garuda's core business and market share as a full-service carrier," it adds. "In relation to the current increasing demand for the 737 Max 8, Garuda feels impelled to promptly execute its long-term fleet plan."