Am currently a DL GM, and was researching the UA program. From the UA website and the forums here, it's still not clear to me if UA offers a similar program to DL's same-day change program, so hoping someone here can clarify for me. I did see a sticky from 2005 that suggested a similar program is $75 but did not seem to be a FF benefit, just a general program on UA.

On DL, as a GM and above, I can switch to an earlier flight with no fee, either with a confirmed seat if one is open or as a standby if the flight is full. The restriction is that I cannot switch until 3 hours before the departure of the intended flight. Once confirmed on the flight, I would remain upgrade eligible as per the usual DL rules.

Does the UA program work similarly for frequent fliers, and if not, how is it different? At what level does it become available?

Thanks in advance