Originally Posted by
SenSCL
Yes, coupons only work on LA operated flghts and under LA flight number.
Upgrades on partner airllines must be purchased with miles, but personally, I have no experience if and how this works. I doubt that the prices are attractive though, especially since LA is not a member of any alliance for the time being.
The flight I'm talking about (LIM-AEP) is an LA flight number, operated by LA. But the ticket has been issued by BA (with Avios).
If I could upgrade it with the coupons from Black status, I might think about doing the LATAM Status Match. But not sure if it's possible with Award tickets