Originally Posted by
NoStressHere
If it is TWO tickets, and if the ticket is refundable, then yes.
If that is one ticket and you skip the 2nd leg, probably not. The ticket would be repriced as a one way and might even be more expensive. Again, the refundable, non refundable question comes into play.
Bottom line - with the information provided, nobody can say for sure.
OP said Flex Plus which is fully refundable with no penalty. Not sure about repricing for cancellation after departure, fare rules would be required.