Originally Posted by
7Continents
From my experience, just to FRA. You need a separate upgrade cert for any continuing flights. Alliance upgrades are much more difficult to use then they used to be. Good luck!
Uh?
You can only upgrade on AC-operated flights, period.
No certs for other airlines, and as far as I can remember, it always was like that. No harder or easier than it used to be.
Only opups. Which may be getting harder to get, but still occasionally occur. Mostly status-based and unrelated to upgrade status of the first leg.