Kuala Lumpur International Airport's Aerotrain resumes 24-hour operations

24-hour operations of the Aerotrain service at the Kuala Lumpur International Airport Terminal 1 (KLIA 1) has resumed.

Following the completion of a comprehensive action plan implemented by airport operator Malaysia Airports Holdings Berhad (MAHB) and Malaysia’s Land Public Transport Agency (Apad), passengers departing from KLIA will be able to travel between the main KLIA 1 building and the satellite terminal anytime during the day from midnight on June 1. 

The completion of the action plan was also verified by independent railway assessors.

In a statement, Malaysia’s Transport Minister Anthony Loke added that daily engineering work will take place between 12 midnight to 5AM as part of ongoing sustainable maintenance and engineering oversight. Endurance testing was conducted over 24-hour and 48-hour periods under both passenger and non-passenger conditions, to which Loke said the Aerotrain recorded 100% operations service availability since January 2026.

“During this period, a single train will continue serving passengers while routine inspection and maintenance activities are carried out,” he said in a statement.

While the Transport Ministry and Apad will exercise regulatory oversight of the Aerotrain’s operations, MAHB remains accountable for maintaining the service standards established under the action plan.

The action plan was launched in November 15, 2025 following 19 recorded incidents involving the Aerotrain between July 2 and September 30. The incidents were attributed to issues such as signaling problems and human-related incidents such as passengers forcing the doors open.

First opened in 1998, the Aerotrain between the main terminal building of KLIA 1 and the satellite terminal was suspended in March 2023 following a breakdown. Operating at 3-5 minute intervals, the trip between the terminal buildings takes around 2-3 minutes.