I had a quick question regarding United's Systemwide Upgrades. I have a sponsor who is willing to give me one of his upgrades for an upcoming trip from MCO to LHR via IAD. The flights are as follows:
MCO-IAD UA 444
IAD-LHR BD4464 operated by UA924
As you can see, the IAD-LHR segment is a codeshare with BMI, but still being flown by a UA aircraft. Will United still honor the upgrade since it is indeed their flight?