Originally Posted by
dkc192
Oh yeah, I would only do it via an agent who assured me I'd be keeping my upgrade. I guess I should've asked more specifically if agents can do this and/or if anyone has successfully done it with an agent.
As has been discussed, UA will not allow change to a lower re-fare if staying on the same flight / cabin except in the first 24 hours or in the first 30 days for a $50 fee. Otherwise you have to change to a different flight and change back. An agent is unlikely to help with the latter.