It's not "el casa", "casa" is a feminine noun in spanish, therefore it has to use "la" and not "el"
To answer this, it will have to say: "para llegar a la casa de el aeropuerto, toma una izquierda de una calle, y caminas derecho otra calle; caminas derecho y haces una vuelta y caminas a la derecha".
This is about right, i think.....
