While purchasing the first ticket, you can mark the Return button, or after purchasing one-way, you can re-enter the system and purchase the return tickets by examining the reverse route sign with the reverse route sign.
When you search for flights between Kuala Lumpur and Singapur, all active companies and flight times on the date you entered are listed. You can find the cheapest flight tickets by sorting this list by price.
The most frequently used airline companies from Kuala Lumpur to Singapur are generally
Malaysia Airlines,
Malindo Airways,
Qatar Airways,
Airasia,
United Airlines,
Ethiopian Airlines,
FireFly,
Swiss,
Qantas Airways,
Air France,
Emirates,
Singapore Airlines,
Oman Air,
KLM,
Tiger Airways,
Air New Zealand,
Jetstar Asia,
Scandinavian Airlines,
Finnair,
Srilankan Airlines,
Etihad Airways
are companies.