I’m looking to fly to Paris /Frankfurt business class family of 4 in 2021 via krisflyer.
I expect to have around 500k points by time I need to book. Ie not quite enough.
What’s cheapest cash/points combo to secure seats?
Eg. Buy 4 x economy with cash then upgrade? 4 x business using cash and points? (not sure if these end up the same?)
Any other considerations?