Originally Posted by
emcampbe
reports are that 24 hours after you book, the flights should be cancelable via UA (some say 3 days, though). If it hasn’t been that long, try waiting. If it has, maybe something has changed?
That was my recollection. I have done this before for prior UA bookings. In any case, the fare I was looking to book (to replace the one I want cancelled) has gone up. Few months away. I'll wait and retry later.