Originally Posted by
sbm12
Without knowing the OP's base fare and what the cheapest F fare is on the route I'm not all that surprised. Until the day of departure the cash-only upgrade price should be based on the difference in fare between the original purchase and the currently available best price which will confirm into biz, be it M-up, P fare, F fare or something else. If the fare differential is too high they don't always show it. ...
when R>0, I've seen this on about any fare but it may make sense to not to show if the offer is too outrageous.
Originally Posted by
sbm12
...The discounted offers don't show up until day of departure AFAIK.
alluded to that in post #2.