American Airlines provides a convenient option for passengers to select their flight seats based on personal preferences and comfort. To upgrade to Business Class, log in to your booking on the official website, explore upgrade choices in the "Manage My Booking" section, and follow instructions for bidding or using miles/points. Confirm the upgrade and receive details via email. For assistance, reach American's customer service at 1 (800) 433-7300 or +1-888-609-1015 (OTA Skip-Waiting). Upgrade availability and procedures may vary. For inquiries about American Business Class, contact American's customer support or visit Airlines Group Travel for additional information and assistance.