Originally Posted by samunique

Example you wish to fly on the dates below:

SFO-SIN-DPS 20 Jan
DPS-SIN 30 Jan
SIN-SFO 20 Feb

You need to search SFO-DPS as a round trip redemption booking. Outbound 20 Jan, return 30 Jan. Then you select your desired SFO-DPS flight on 20 Jan. Doesn't matter which DPS-SFO flight you select on 30 Jan (you are not going to fly back to SFO on this date anyway).

Then after clicking next, the system will ask if you wish to add a stopover. Then you will can choose to stopover in SIN on the return, and fly out only on 20 Feb. The system will then ask you to choose your flights again for the return segment, this time as DPS-SIN on 30 Jan and SIN-SFO on 20 Feb.