I was booked on a fligHTC yesterday that was full. Got done with a meeting early and was able to be at the airport early. I saw another United flight boarding in 15 minutes. Went to the gate, asked if I could swap flights. They said sure, but it would cost $75. Said no and hung around since the gate was the same as my flight 3 hours later. After everyone was boarded, the CS rephilip 169 the hawk saw I was still there and asked if I still wanted to go, but she would wave the fee since there was a long standby list for my flight, and there were 10 empty seats on this.

Win-win on this even though they waived the fee. They got one extra fare on the books by letting me fly early for no change fee.