Due to the current Covid-19 pandemic, all regular services and hours may be subject to change. Thus, if the idea is to spend the night in the public area, consider a plan B in case the stay inside the airport is only allowed for those who are close to boarding.
Spending the night at the airport
Kuala Lumpur airport operates with many flights and connections, so movement is usually constant, even during the night. Earplugs are necessary for a good rest. The place can get pretty cold, so have something warm at hand.
Where to rest: Although it is possible to find many seats throughout the enclosure, the main terminal has the most comfortable options. The food court of the second floor is a particularly quiet place, as well as level 4. There are several VIP lounges inside the airport, some of them open around the clock. However, keep in mind that they generally have a maximum stay. On the other hand, there are transit hotels in both terminals and several options connected to the enclosure.
Baggage: 24-hour left-luggage service in KLIA1.
Eating and drinking: There are options open during the night inside both terminals.
Restrooms: Besides the VIP lounges, free showers are available on the fourth floor of the main terminal.
Wi-Fi: Free for 3 hours.
Other services available around the clock: ATMs, convenience and duty-free stores, baby changing facilities, children's playgrounds.
On the mezzanine level of the satellite building is situated the Sama-Sama Express, with another facility inside the satellite building of KLIA2. The CapsuleTransit AIR is found on level 2 of the satellite building. On the other hand, there are hotels that are connected to the enclosure through covered walkways:
Sama-Sama Hotel (0.4 km/0.2 miles)
Aerotel (2.4 km/1.5 miles)
Tune Hotel (2.6 km/1.6 miles)
GLG KLIA Transit House (4 km/2.5 miles)
Movenpick Hotel & Convention Centre KLIA (4.9 km/3 miles)