To cancel a flight for only one person on a multi-passenger booking with American Airlines in 2026, you must first "Divide" or "Split" the record. This cannot always be done through the basic "Cancel" button on the website. You should log into the "Manage Trips" section, select the reservation, and look for an option to "Split Reservation." You then select the specific passenger you wish to remove and confirm the split, which generates a new, separate 6-digit confirmation code (PNR) for that individual. Once the reservation is divided, you can proceed to cancel the new, single-passenger booking without affecting the other travelers. If the "Split" button is grayed out—which often happens with certain "Basic Economy" tickets or those involving pets—you will need to call American Airlines Customer Service or use the "Chat" feature in the mobile app. After cancellation, you will typically receive a Flight Credit for the value of the ticket (minus any applicable fees), which is valid for one year from the original date of issue. Always ensure the split is completed before clicking any final "Cancel All" buttons to prevent inadvertently canceling the entire group's trip.