Originally Posted by
neelcor
On the desktop website, a workaround used to be to first select "Book a ticket" (cash fare), choose "Multi-city" and set up your itinerary, then as a last step before selecting "Search flights" choose the "Book with miles" option. The search would then return the price of the multi-city segment in miles. I used this workaround as recently as 6 months ago.
However, it seems they've patched this in their backend system – and the workaround no longer works. Does anyone have experience with calling FB and getting an agent to price up a multi-city itinerary?

It actually still works from desktop, you just choose multi destination on the cash option, then switch to Miles option and
you will be allowed to search for your desired itinerary!