This is a long parade, so it might be an idea to book a seat

It starts at 6pm and ends in time for everyone to walk to the seafront to see the burning of ‘Don Carnal’ and the firework display.

https://www.carnavaldeaguilas.org/sillas-palcos.php

If you want to buy your ticket in Aguilas, they will be for sale from Monday to Friday, from 5 to 9pm at Calle Rey Carlos III. 17 .