Originally Posted by
shackleton
I'm looking at two different itineraries booked through AC - one with all AC metal, one with a long leg on AC and a short leg on UA. Knowing that the UA flight can earn such arbitrary credit, safer to just go with the guaranteed earnings on the all-AC itinerary?
Welcome to FlyerTalk!
It depends upon a number of factors. Assuming a non-016 ticket, the earnings would be fixed, based upon fare class and distance, for the AC-operated legs. The UA-operated leg can be anything but will most likely be a distance-based proration of the fare. Calculate the number of guaranteed miles / PQP on each routing, and then see how much you'd need UA to credit for its leg in order to come out ahead, compare it to your fare, and you can get a pretty good idea how likely it is.
