I booked a DONE4 online ex-AMM for $7,203.00 + $610.38 taxes using the oneworld online tool last month.

Granted, I had a lot of trouble with finding an itinerary it was happy with (15012 error on many, many attempts), but managed to get it through. I ended up having to drop some flights towards the end of the itinerary, and will end up just paying the re-ticketing fee to re-do it later, but that's no big deal. Certainly better than paying the far higher fare that doing it over the phone would've required.

Just a few data points for anyone getting the 15012 errors from the online tool. I had a 100% valid-by-the-rules itinerary, but had to play around with simplifying to make it accept it:

- It hated any BA/AA codeshare; I had to finish the itinerary with DFW-CDG-AMM and cut out the BA flight within Europe I had initially
- I had to change DFW-SYD to the AA codeshare from the QF flight
- I had to remove "extraneous" North America flights (I had a DFW-LGA-DFW in between SYD-DFW and DFW-CDG)

I don't honestly know which of those actually was they key, having tried so many permutations. It was frustrating having to click through so many pages and re-enter the CC info every time, but persistence paid off eventually.