Originally Posted by
xliioper
No, don't think there is anything that inhibits upgrades if seats are not together. If you are on same PNR and check-in together, you will either both be upgraded or neither (if there is only one seat open). Believe if you check-in separately, it can upgrade one without the other without splitting PNR, but not positive on this.
take the speculative “I don’t think” out, make this reply a declarative, and put the answer somewhere as a sticky,
viz.:
There is nothing that inhibits upgrades if seats are not together. If you are on the same PNR and check in together, you will both be upgraded (or neither, if there is only one seat open).