In September of last year, I booked two business class tickets for my June 2020 Tauck tour of Ireland at a cost of $6000. When I saw that the tour wasn't likely to go, I postponed it to August (wishful thinking). United allowed me to change the tickets without a change fee, as was their policy at the time. What they didn't tell me on the phone, was that the new flights had a value of $4400 (it was on the new tickets that they later e-mailed me, but unfortunately I didn't notice that at the time). When my August flights got cancelled, they only refunded the $4400. I put in a refund request for the other $1600, but it was denied. Their justification is that when they waived change fee they also stopped issuing any refund or credit for lower priced tickets. So I'm out $1600 and have nothing to show for it.
FAA regulations require a full refund for cancelled flights. So I will be filing a consumer complaint with them. I'm not holding out much hope.
The moral of this story is to be very careful when rescheduling flights. Ask if they are changing the value of the ticket. If I had known that they were devaluing my tickets, I would have waited for them to cancel the flight and gotten a full refund for the original tickets.
The flight attendants always end their deplaning speech with, "We know you have a choice and we thank you for choosing United." You can bet I won't be choosing United in the future if there is another option.