Originally Posted by
Stranger
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.
Hi Stranger, back in the 90s, the upgrade certs were also good for LH and UA...
I believe that AC is also the ONLY carrier left in STAR not offering upgrades... hence the op is probably confused as if he was with any other STAR carrier he would be eligible to do this.