Originally Posted by
hillta1
If I book a flight on US that is operated by UA (code share) and use my UA FF number -- does the flight count as UA BIS (butt in seat) ... that is, do those miles count towards the 10,000 miles needed for complimentary E-upgrades and lifetime UA miles?
Thanks,
To expand on lucky's response, it's always the operating carrier that matters for Mileage Plus, regardless of which carrier you book the ticket through.