Using any of the American Airlines offline and online options, you can proceed with the American Airlines Seat Upgrade procedure. But it's crucial for you to know the terms and conditions rather than continuing with its procedure. 

• American Seat Upgrade to first and business class can be covered in several ways such as miles redemption, Complimentary upgrades, small-business program and Systemwide upgrades, or SWUs.
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• Basic economy flyers won’t upgrade  their seat as per the American Airlines Policy.
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• Further, seat upgrade is possible only when the American Airlines business and first class Seats are accessible at the moment.
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• When miles are not enough to cover the upgrade value, the customers are supposed to pay the difference value in cash. 

How Much Miles Do I Need to Upgrade to American Airlines First Class/Business?

If your concern is about leveraging miles to upgrade to American Airlines First class or Business class. Then, ensure that you would have at least 15000 miles to redeem for upgrading American Airlines Seats to first class/ business class. However, depending on recent seat, the American Airlines Miles have decided to upgrade the seats to American First class or business class. 

Steps to Upgrade to American Airlines First/ Business Class

When it's your first attempt to upgrade the seat from economy to first/ business class, it is crucial for you to follow the below explained steps in a queue. 

1. Switch to any global browser and type American Airlines in the search bar.
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3. The very next thing that you need to do is, access “www.bookaflightdeals.com
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5. With this, you should login to the AAdvantage Account.
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7. After that, you should click on the Manage Trips/Check-in tab.
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9. Meanwhile, you need to provide your booking details such as Passenger last name and confirmation code.
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11. Further, your booking will be retrieved.
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13. Now, choose the Manage booking option as well as the change term.
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15. With this, you can look for the seat accessibility on your favourable class.
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17. Next, you can upgrade you recent flight seat to the business class or first class. 
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19. Continue ahead as per the instructions visible on the screen.
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21. Lastly, validate your Upgrade on American Airlines by paying the valuable amount either in cash or miles. 

The same procedure you could apply while completing the American seat upgrade process via mobile application. Besides this, you can even talk to American Airlines experts over a call to ease your way while switching genuine to premium.