You can change your United Flight Change (time, date or destination) by phone (1-866-399-0587) or online. Online changes can be made if you purchase your ticket directly from United.
To make changes to your flight date, time, and/or destination online, follow the steps listed below.
Go to United.com
In the upper pane of the booking box, select My trips
Access your trip by entering your confirmation number and name
Choose the route you want to manage
Select the Edit Flight option, then Edit to:
Change your travel date or time
Change your destination
Add a flight
Remove a flight
Click Continue to select a new flight
Continue with your booking to confirm your new itinerary
(even if the change fee is shown as waived, any fare difference will apply)
You will receive an e-mail confirming the flight change.