Originally Posted by
Bozzie4
I have a UA flight on LH metal from Europe to the US next week. It is a Y fare. What would be the best way to upgrade this flight using Mileageplus miles?
Bad news -- a UA codeshare on LH is not eligble for upgrading with miles. Only a natively booked LH is upgradeable with miles (and a very high fare class).
Star Alliance Upgrade Awards are valid on participating carriers only, and only on flights marketed and operated by the same airline
This true for all *A flights and for all *A programs (that participate in the cross program mileage upgrades).
See
Star Alliance Upgrade Awards
or
http://www.flyertalk.com/forum/unite...-carriers.html