Originally Posted by
MSPeconomist
It sounds like part of the OP's tradeoff is some chance of domestic upgrades when flying UA as a UA elite
That's the absolute last thing OP should be basing this decision on.
I think the two most relevant considerations are:
1. *G on UA at 50K Premier Qualifying Miles.
2. Much better award redemptions via UA, with
no fuel surcharges on any airline.
Unless you're going to qualify for SEN on LX, UA is the clear choice here.