Originally Posted by
alphaod
I'm curious what's the likelihood of being bumped down after using both mileage (and small price difference) to upgrade to F? My fare was booked on Z/P, hence the requirement to pay for small price difference (still cheaper than paying for actual F).
It's not a common occurrence, usually happening only when there's an irregular operation, such as weather/mechanical/plane swap. or some other more important passenger misses a flight.