Originally Posted by iamhereandthere
Thought I read in one of the DO threads a sentence that the NWA system had something that prevented this from happening and DL is using that now(so to speak, the idea, not the system necessarily). On my op-ups or VDB to J or F I haven't seen any errors in my favor.
NWA was very good at tracking the original fare paid. Very rarely did you get the bonus unless you were rebooked under a new PNR.