I was thinking of AC as well- as it is I tend to fly SFO-YYZ with AC at least twice a month (vs via Denver other times).
Do I get UC access with AC *Gold?
I have been stuck at DEN twice this winter with delays of several hrs and always spend time there.

The main reason to look at LH was to help with travel with the EU, including lounge access for the family (LH offers paid access to kids vs having only the one guest). But a good restaurant at FRA probably beats sinking miles from scratch into it.

I do like the accrual and redemption with United for sure - already booked R/T tix for the family from West US via CDG for 60k miles leaving july returning August.
I don't care for the upgrades but about being able to get the family to other places (4 pax total)
Maybe maximizing the accrual on UA while getting EXP on AA on the side is the way to go in this case.

Thx!