Originally Posted by
EQDsSUCK
If I use 15,000 miles to upgrade a UA coach ticket in the Y fare class between US and Europe and I change the date of my ticket, will the upgrade just apply to my new ticket? And will UA deposit the miles back into my account if there are no upgrades available for my new travel date?
If you cancel/ change a flight that had a waitlisted or cleared mileage upgrade --- the miles (and, if any, copay) will be refunded with no penalty. This should be automatic but occasionally you may need to call the MileagePlus Service Center if not done.
If you want to place a new request on the new flight, you will have to do that separately. If using an agent, they can do both at the same time.