Thailand trip – Fly into Singapore and out of Chennai – companion voucher?

[mulv2222]

Basically, can i do this using my 2 4 1 companion voucher?? Bo flight to BKK and seeing at we want to go to Koh Samui, we can fly there from SIN saving an extra flight, and visit BKK on way home to then fly to Chennai and then london… No return flight from SIN for my dates. Closest is Chennai unless I’m missing a trick??

Any help or advice once again much appreciated!

[BBbetter]

Yes, open jaw is allowed and we have done similar a few times.
Is KUL route not available for your dates?
HKG is similar distance away from that region, but it becomes a longer route. On the flip side, you can get better sleep on a longer route.