From @Airlineroute:
D7 672 KUL0800 – 0905SIN
D7 673 SIN1005 – 1110KUL
D7 678 KUL1240 – 1340SIN
D7 679 SIN1440 – 1545KUL
AirAsia X to operate 2 daily Kuala Lumpur – Singapore service from 10NOV19
D7 673 SIN1005 – 1110KUL
D7 678 KUL1240 – 1340SIN
D7 679 SIN1440 – 1545KUL