Can I combine Saver rewards and Flex rewards?

You can book a return ticket using a combination of Saver and Flex reward fares, depending on your travel requirements and what allocated seats are available at the time of booking. If you choose this type of ticket, please remember that Saver reward conditions will apply to the entire ticket.

Related questions

What are the differences between a Skywards Saver flight reward and a Skywards Flex flight reward?
Why should I buy a Skywards Flex fare when a cheaper Skywards Saver fare is available?
What if I have difficulty redeeming my Skywards Miles for a Saver Reward on a high-demand flight?