Retrieve your reservation by logging into the United Airlines website. You can use any of the following information: confirmation number and last name, e-ticket number and last name, or credit card number and last name.
Make the changes to the itinerary. Note that you can only make changes online if you have any of the following: an e-ticket issued in American or Canadian dollars, an e-ticket for travel on marketed United or United Express flights, have an e-ticket that has a published fare, have an e-ticket issued for one-way or round trip flight.
Check your credit card statement over the next few days. After the changes are complete, any difference in fares -- including taxes and service charges -- will be assessed. The price difference will either be refunded to the original credit card or charged to the provided form of payment. If neither has occurred, or you have any questions, contact United Airlines Customer Service.
