Originally Posted by
Oxymore
That's not true. I have split payment for AF/KL tickets bought through Expedia, for example. You can do it online, you only need to have the charge appear as an airline ticket with a 057- or 074- stock (too bad it doesn't work for 006- as well!).
AMEX in NL refused to split KL tickets bought from eBookers and did not apply the extra point/mile for that purchase.
However, when I complained, they awarded me the missing miles (as a one time courtesy).