FlyerTalk Forums - Booking two seats / extra seat for person or object (EXST, XTRASEAT)

Booking an extra seat on for POS (Persons Of Size) or other reasons
American Airlines sells adjacent seats for various reasons; the most common one is for persons of size who can't comfortably occupy a single "Main Cabin" (Economy) seat, though others might consider purchasing an extra seat for comfort or to protect items of exceptionally high value. This seat was referred to by AA as "XTRASEAT" or “EXST”, and this JOHN BROWN
EXST BROWN
is how it will reflect in some documentation. There is no discount for the second seat, which must be purchased in advance; walk up purchases of extra seats will incur full "walk up" fares, if available.

As these can not be booked online, calling will work best; no telephone service charge will be made.

The extra seat does not earn Elite Qualifying or Redeemable miles or earn extra baggage allowances, etc. EQ instruments can only be earned by the individual person occupying a seat on AA (not an empty seat, a "proxy passenger" or animal or inanimate object). In the example above, EXST BROWN will have no AAdvantage earnings.

Quote:

Extra space during travel Link

For the safety and comfort of all customers, if a customer’s body extends more than 1 inch beyond the outermost edge of the armrest and a seat belt extension is needed, another seat is required. We encourage customers to address all seating needs when booking.

When you call to book, Reservations will make sure you get 2 adjacent seats at the same rate.
If you didn’t book an extra seat in advance, ask an airport agent to find out if 2 adjacent seats are available.
You may be offered a seat in a higher class of service that may provide more space; in this case, you’ll be responsible for the fare difference.
If accommodations can’t be made on your original flight, you can buy seats on a different flight at the same price as your original seats.

For the safety and comfort of all customers, if a customer’s body extends more than 1 inch beyond the outermost edge of the armrest and a seat belt extension is needed, another seat is required. We encourage customers to address all seating needs when booking.

Other reasons for purchasing extra seats would be for allowed musical instruments, objects of high value such as art works, or materials for human transplantation.