The transport ministry instructed nine low-cost carriers to improve safety standards and avoid prioritising cost-cutting.

South Korea will extend runway safety areas and redesign infrastructure after the crash of a Jeju Air Co. flight last month that killed almost everyone on board, sparking criticism that the design of the airport might have exacerbated the accident.

South Korea’s transport ministry has announced measures to increase scrutiny of the country’s LCCs in the wake of the fatal Jeju Air crash in December. The Ministry of Land, Infrastructure and Transport (MOLIT) held a meeting with the CEOs of nine LCCs in Seoul to discuss the changes and airline...