Attached is the schedule for KLIA train service for your easy reference :
KLIA Ekspres Train Times
Journey time: 28 minutes
Every 15 minutes – peak hours
(Mon to Fri 06:00-09:00 hrs and 16:00-22:00 hrs)
Every 20 minutes – off-peak hours
(Mon to Fri 05:00-06:00 hrs, 09:00-16:00 hrs and 22:00-00:00 hrs; Sat and Sun all day)
Every 30 minutes – after midnight
KLIA Transit Train Times
Schedules are subject to change.
Seat reservation is not required. Boarding is on a first-come first-served basis. You are advised to allow ample time to reach your destination.
Till then, see ya ~