Korean Air Lines and Asiana Airlines, the country's two largest and full-service operators, have already focused on expanding their cargo businesses to compensate revenue losses in the past two years.
Jeju Air also plans to add 50 B737-8 MAX jets to its fleet between 2023 and 2027 to prepare for the post-covid era.
Jeju Air currently operates 39 B737-800NG passenger jets and conducts flights on 10 domestic routes and one flight a week on six international routes to Bangkok, Guam, Saipan, Harbin, Weihai, and Tokyo.