If you want to go to Benguela by airplane, take Air26.
Air26 takes only about 45 min to one hour to and from Luanda.
TAAG takes about 4 hours because it stops in several cities.
Ticket fare is $150 USD
The airplane it's a Embraer 135, very confortable, fast bagadge delivery.
Free seats. Who gets first in to the airplane gets the best seat or the seat he wants.
But don't forget to take your passport with you.
Domestic flights also requires passport control.
Rain watter collecting pipe system doesn't collect only watter from the rain.During the years several houses were conected to this system. The result it's that you have all kind of domestic swedge infiltrated in the sand and reaching the sea water without any treatment. Kids around there use to pick up water from the broken pipes and use it to wash the cars near by.
On the same beach, about half km away you may see another swedge point, and this one you may see it from Google Earth!!