Originally Posted by
Kristen68
I've been keeping an eye on the availability of upgrading my WTP booking to CW. This morning I see I can upgrade one leg for 10K avios plus $185. Is there always cash involved, or can this (possibly) further change to me being able to upgrade with avios only?
As noted by The Banking Scot with the upgrade you must pay in cash any additional taxes and surcharges that are due for travel in the upgraded cabin.