Fly by Night and Day
3 Decades of Experience working for United Airlines!
Foturnately, if you are not changing the date and only the time, there is a lesser fee of $75. Here is the link:
I'll try to make it easy.
You can appeal to the reservation agent on the phone or web support and admit you made an error, request a waiver for the change fee, or if you are changing within 24 hrs of the booking all the changes are free of change fees, you are only responsible for the fare difference. Call as soon as you can.
Global resources for your trip. Currently Position- United Club; Main customer contact at the airport...
Same Day Change
Customers holding restricted* tickets can make same-day flight changes for a discounted fee. MileagePlus Premier Gold, MileagePlus Premier Platinum and United 1K members may request a same-day change at no charge. The following fees and conditions apply: