American Airlines permits passengers to upgrade their seats to the first class cabins. Travelers can upgrade using several methods, such as using AAdvantage miles, paying in cash during check-in (if available), or placing a bid to the airline. The American Airlines First Class Upgrade depends on the ticket type of the passengers, or it can also be complimentary from the airline, as per your loyalty status. If you need help with upgrades, you can contact the AA customer service or go through the blog on the Airlines Group Travel website.