United is about the only airline that hasn't melted down this year. Unless there's a storm that is hitting two hubs at the same time your hold time will be short. They were very proactive about bringing staff back and your articles were from a few months ago.

As others have said, this is a quick fix that can be done over the phone. The safe approach to air travel is if you notice something wrong with your ticket or reservation, try to get it fixed before getting to the airport. Something like this only needs a TSA agent having a bad day to cause you serious annoyance. Nothing like waiting in line 30m for your ID check, only to be sent back to the ticket counter to correct the issue, then spend another 30m in line for security. Probably not the way you wanted to start your trip.

Not to be a pain here, but this isn’t about a TSA agent having a bad day. If the dates don’t match, then the system has not properly vetted the passenger against watchlists, security concerns, etc. The TSA agent absolutely should not allow the passenger through, or at a minimum they should be subjected to additional more thorough screening. That is the whole point of doing these ID checks in the first place. Also of note, this is an adult passenger we are talking about, not a minor.

Just want to highlight that it’s not fair to discount this as a “bad day” for a TSA agent who would absolutely be doing their job.

To the OP - this was your error, and it’s your obligation to get it fixed, which is not difficult to do. Let’s stop making this about United’s hold times, insufficient IT options or moody TSA agents. Goodness, the time in this thread has already dwarfed the time it would have taken to correct this in the first place many times over.

I've personally been booked on a domestic ticket with incorrect DOB (company travel assistant error) and even though my TSA KTN was correct on the reservation, my ticket did not have Pre-Check attached to it due to the DOB error.

If you can't correct it online then call and they'll correct it for you on the itinerary. Never risk a travel issue due to a ticketing error you're already aware of in advance...

Just put your call on speaker phone and go about your business while waiting.