Answer:
habremos llegado
Step-by-step explanation:
Para las ocho, nosotros habremos llegado al Departamento Chocó.
Translation :
By eight o'clock, we will have arrived at the Chocó Department.
The verb "to arrive" is conjugated in time: "perfect future" (from Spanish) because it speaks of a possible future and belongs to the 1st person of the plural: "we" .
In Spanish, the perfect future is used, on the one hand, to express an action completed in the future and prior to an action also future (example: Next week I will have already started my Japanese course); and, on the other, to express probability, doubt or hypothesis in a recent past (Example: Simon has not come to work. He will have become ill).