How to find the confirmation number on a domestic ticket in the United States

Email, text message or printed itinerary.

According to the official website of China Eastern Airlines and United Airlines, we learned that the confirmation number is a code composed of letters and numbers used to identify your ticket reservation and itinerary. You can find the confirmation number in the email, text message or printed itinerary you receive when booking or later. The confirmation number can help you view or manage your reservation on the airline's website or app, such as changing flights, selecting seats, checking in, printing boarding passes, etc.